593 lines
23 KiB
VB.net
593 lines
23 KiB
VB.net
Imports System.Data
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''' <summary>
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'''
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''' </summary>
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Namespace Data
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''' <summary>
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''' This is a DataReader that 'fixes' any null values before
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''' they are returned to our business code.
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''' </summary>
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<Serializable()> _
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Public Class SafeDataReader
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Implements IDataReader
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Private mDataReader As IDataReader
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Private mIndex As Integer = -1
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''' <summary>
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''' Initializes the SafeDataReader object to use data from
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''' the provided DataReader object.
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''' </summary>
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''' <param name="DataReader">The source DataReader object containing the data.</param>
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Public Sub New(ByVal DataReader As IDataReader)
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mDataReader = DataReader
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End Sub
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''' <summary>
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''' Gets a string value from the datareader.
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''' </summary>
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''' <remarks>
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''' Returns empty string for null.
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''' </remarks>
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Public Function GetString(ByVal i As Integer) As String Implements IDataReader.GetString
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If mDataReader.IsDBNull(i) Then
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Return ""
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Else
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Return mDataReader.GetString(i)
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End If
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End Function
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''' <summary>
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''' Gets a string value from the datareader.
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''' </summary>
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''' <remarks>
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''' Returns "" for null.
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''' </remarks>
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Public Function GetString(ByVal Name As String) As String
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'Changed: 21-March-2006 added toupper to all Me.GetOrdinal in this file
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'to fix problem with norwegian aA combination as in AACTIVE etc
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetString(mIndex)
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End Function
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''' <summary>
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''' Gets a value of type <see cref="System.Object" /> from the datareader.
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''' </summary>
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''' <remarks>
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''' Returns Nothing for null.
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''' </remarks>
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Public Function GetValue(ByVal i As Integer) As Object Implements IDataReader.GetValue
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If mDataReader.IsDBNull(i) Then
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Return Nothing
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Else
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Return mDataReader.GetValue(i)
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End If
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End Function
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''' <summary>
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''' Gets a value of type <see cref="System.Object" /> from the datareader.
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''' </summary>
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''' <remarks>
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''' Returns Nothing for null.
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''' </remarks>
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Public Function GetValue(ByVal Name As String) As Object
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetValue(mIndex)
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End Function
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''' <summary>
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''' Gets an integer from the datareader.
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''' </summary>
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''' <remarks>
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''' Returns 0 for null.
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''' </remarks>
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Public Function GetInt32(ByVal i As Integer) As Integer Implements IDataReader.GetInt32
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If mDataReader.IsDBNull(i) Then
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Return 0
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Else
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Return mDataReader.GetInt32(i)
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End If
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End Function
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''' <summary>
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''' Gets an integer from the datareader.
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''' </summary>
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''' <remarks>
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''' Returns 0 for null.
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''' </remarks>
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Public Function GetInt32(ByVal Name As String) As Integer
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetInt32(mIndex)
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End Function
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''' <summary>
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''' Gets a double from the datareader.
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''' </summary>
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''' <remarks>
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''' Returns 0 for null.
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''' </remarks>
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Public Function GetDouble(ByVal i As Integer) As Double Implements IDataReader.GetDouble
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If mDataReader.IsDBNull(i) Then
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Return 0
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Else
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Return mDataReader.GetDouble(i)
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End If
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End Function
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''' <summary>
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''' Gets a double from the datareader.
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''' </summary>
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''' <remarks>
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''' Returns 0 for null.
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''' </remarks>
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Public Function GetDouble(ByVal Name As String) As Double
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetDouble(mIndex)
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End Function
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''' <summary>
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''' Gets a <see cref="T:CSLA.SmartDate" /> from the datareader.
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''' </summary>
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''' <remarks>
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''' A null is converted into the min possible date
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''' See Chapter 5 for more details on the SmartDate class.
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''' </remarks>
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''' <param name="i">The column number within the datareader.</param>
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Public Function GetSmartDate(ByVal i As Integer) As SmartDate
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If mDataReader.IsDBNull(i) Then
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Return New SmartDate(True)
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Else
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Return New SmartDate(mDataReader.GetDateTime(i), True)
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End If
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End Function
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''' <summary>
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''' Gets a <see cref="T:CSLA.SmartDate" /> from the datareader.
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''' </summary>
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''' <remarks>
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''' A null is converted into either the min or max possible date
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''' depending on the MinIsEmpty parameter. See Chapter 5 for more
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''' details on the SmartDate class.
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''' </remarks>
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''' <param name="i">The column number within the datareader.</param>
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''' <param name="MinIsEmpty">A flag indicating whether the min or max value of a data means an empty date.</param>
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Public Function GetSmartDate(ByVal i As Integer, ByVal MinIsEmpty As Boolean) As SmartDate
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If mDataReader.IsDBNull(i) Then
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Return New SmartDate(MinIsEmpty)
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Else
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Return New SmartDate(mDataReader.GetDateTime(i), MinIsEmpty)
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End If
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End Function
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''' <summary>
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''' Gets a <see cref="T:CSLA.SmartDate" /> from the datareader.
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''' </summary>
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''' <remarks>
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''' A null is converted into min possible date
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''' See Chapter 5 for more details on the SmartDate class.
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''' </remarks>
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''' <param name="i">The column number within the datareader.</param>
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Public Function GetSmartDate(ByVal Name As String) As SmartDate
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetSmartDate(mIndex, True)
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End Function
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''' <summary>
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''' Gets a <see cref="T:CSLA.SmartDate" /> from the datareader.
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''' </summary>
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''' <remarks>
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''' A null is converted into either the min or max possible date
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''' depending on the MinIsEmpty parameter. See Chapter 5 for more
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''' details on the SmartDate class.
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''' </remarks>
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''' <param name="i">The column number within the datareader.</param>
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''' <param name="MinIsEmpty">A flag indicating whether the min or max value of a data means an empty date.</param>
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Public Function GetSmartDate(ByVal Name As String, ByVal MinIsEmpty As Boolean) As SmartDate
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetSmartDate(mIndex, MinIsEmpty)
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End Function
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''' <summary>
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''' Gets a Guid value from the datareader.
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''' </summary>
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Public Function GetGuid(ByVal i As Integer) As Guid Implements IDataReader.GetGuid
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If mDataReader.IsDBNull(i) Then
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Return Guid.Empty
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Else
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Return mDataReader.GetGuid(i)
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End If
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End Function
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''' <summary>
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''' Gets a Guid value from the datareader.
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''' </summary>
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Public Function GetGuid(ByVal Name As String) As Guid
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetGuid(mIndex)
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End Function
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''' <summary>
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''' Reads the next row of data from the datareader.
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''' </summary>
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Public Function Read() As Boolean Implements IDataReader.Read
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Return mDataReader.Read
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End Function
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''' <summary>
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''' Moves to the next result set in the datareader.
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''' </summary>
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Public Function NextResult() As Boolean Implements IDataReader.NextResult
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Return mDataReader.NextResult()
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End Function
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''' <summary>
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''' Closes the datareader.
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''' </summary>
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Public Sub Close() Implements IDataReader.Close
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mDataReader.Close()
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End Sub
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''' <summary>
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''' Returns the depth property value from the datareader.
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''' </summary>
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Public ReadOnly Property Depth() As Integer Implements System.Data.IDataReader.Depth
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Get
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Return mDataReader.Depth
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End Get
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End Property
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''' <summary>
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''' Calls the Dispose method on the underlying datareader.
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''' </summary>
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Public Sub Dispose() Implements System.IDisposable.Dispose
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mDataReader.Dispose()
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End Sub
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''' <summary>
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''' Returns the FieldCount property from the datareader.
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''' </summary>
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Public ReadOnly Property FieldCount() As Integer Implements System.Data.IDataReader.FieldCount
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Get
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Return mDataReader.FieldCount
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End Get
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End Property
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''' <summary>
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''' Gets a boolean value from the datareader.
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''' </summary>
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Public Function GetBoolean(ByVal i As Integer) As Boolean Implements System.Data.IDataReader.GetBoolean
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If mDataReader.IsDBNull(i) Then
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Return False
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Else
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Return mDataReader.GetBoolean(i)
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End If
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End Function
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''' <summary>
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''' Gets a boolean value from the datareader.
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''' </summary>
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Public Function GetBoolean(ByVal Name As String) As Boolean
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetBoolean(mIndex)
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End Function
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''' <summary>
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''' Gets a byte value from the datareader.
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''' </summary>
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Public Function GetByte(ByVal i As Integer) As Byte Implements System.Data.IDataReader.GetByte
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If mDataReader.IsDBNull(i) Then
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Return 0
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Else
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Return mDataReader.GetByte(i)
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End If
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End Function
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''' <summary>
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''' Gets a byte value from the datareader.
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''' </summary>
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Public Function GetByte(ByVal Name As String) As Byte
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetByte(mIndex)
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End Function
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''' <summary>
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''' Invokes the GetBytes method of the underlying datareader.
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''' </summary>
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Public Function GetBytes(ByVal i As Integer, ByVal fieldOffset As Long, ByVal buffer() As Byte, ByVal bufferoffset As Integer, ByVal length As Integer) As Long Implements System.Data.IDataReader.GetBytes
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If mDataReader.IsDBNull(i) Then
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Return 0
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Else
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Return mDataReader.GetBytes(i, fieldOffset, buffer, bufferoffset, length)
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End If
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End Function
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''' <summary>
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''' Invokes the GetBytes method of the underlying datareader.
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''' </summary>
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Public Function GetBytes(ByVal Name As String, ByVal fieldOffset As Long, ByVal buffer() As Byte, ByVal bufferoffset As Integer, ByVal length As Integer) As Long
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetBytes(mIndex, fieldOffset, buffer, bufferoffset, length)
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End Function
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''' <summary>
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''' Gets a char value from the datareader.
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''' </summary>
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Public Function GetChar(ByVal i As Integer) As Char Implements System.Data.IDataReader.GetChar
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If mDataReader.IsDBNull(i) Then
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Return Char.MinValue
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Else
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Return mDataReader.GetChar(i)
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End If
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End Function
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''' <summary>
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''' Gets a char value from the datareader.
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''' </summary>
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Public Function GetChar(ByVal Name As String) As Char
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetChar(mIndex)
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End Function
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''' <summary>
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''' Invokes the GetChars method of the underlying datareader.
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''' </summary>
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Public Function GetChars(ByVal i As Integer, ByVal fieldoffset As Long, ByVal buffer() As Char, ByVal bufferoffset As Integer, ByVal length As Integer) As Long Implements System.Data.IDataReader.GetChars
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If mDataReader.IsDBNull(i) Then
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Return 0
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Else
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Return mDataReader.GetChars(i, fieldoffset, buffer, bufferoffset, length)
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End If
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End Function
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''' <summary>
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''' Invokes the GetChars method of the underlying datareader.
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''' </summary>
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Public Function GetChars(ByVal Name As String, ByVal fieldoffset As Long, ByVal buffer() As Char, ByVal bufferoffset As Integer, ByVal length As Integer) As Long
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetChars(mIndex, fieldoffset, buffer, bufferoffset, length)
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End Function
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''' <summary>
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''' Invokes the GetData method of the underlying datareader.
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''' </summary>
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Public Function GetData(ByVal i As Integer) As System.Data.IDataReader Implements System.Data.IDataReader.GetData
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Return mDataReader.GetData(i)
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End Function
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''' <summary>
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''' Invokes the GetData method of the underlying datareader.
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''' </summary>
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Public Function GetData(ByVal Name As String) As System.Data.IDataReader
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetData(mIndex)
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End Function
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''' <summary>
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''' Invokes the GetDataTypeName method of the underlying datareader.
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''' </summary>
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Public Function GetDataTypeName(ByVal i As Integer) As String Implements System.Data.IDataReader.GetDataTypeName
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Return mDataReader.GetDataTypeName(i)
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End Function
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''' <summary>
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''' Invokes the GetDataTypeName method of the underlying datareader.
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''' </summary>
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Public Function GetDataTypeName(ByVal Name As String) As String
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetDataTypeName(mIndex)
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End Function
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''' <summary>
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''' Gets a date value from the datareader.
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''' </summary>
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Public Function GetDateTime(ByVal i As Integer) As Date Implements System.Data.IDataReader.GetDateTime
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If mDataReader.IsDBNull(i) Then
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Return Date.MinValue
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Else
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Return mDataReader.GetDateTime(i)
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End If
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End Function
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''' <summary>
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''' Gets a date value from the datareader.
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''' </summary>
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Public Function GetDateTime(ByVal Name As String) As Date
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetDateTime(mIndex)
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End Function
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''' <summary>
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''' Gets a decimal value from the datareader.
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''' </summary>
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Public Function GetDecimal(ByVal i As Integer) As Decimal Implements System.Data.IDataReader.GetDecimal
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If mDataReader.IsDBNull(i) Then
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Return 0
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Else
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Return mDataReader.GetDecimal(i)
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End If
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End Function
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''' <summary>
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''' Gets a decimal value from the datareader.
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''' </summary>
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Public Function GetDecimal(ByVal Name As String) As Decimal
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetDecimal(mIndex)
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End Function
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''' <summary>
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''' Invokes the GetFieldType method of the underlying datareader.
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''' </summary>
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Public Function GetFieldType(ByVal i As Integer) As System.Type Implements System.Data.IDataReader.GetFieldType
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Return mDataReader.GetFieldType(i)
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End Function
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''' <summary>
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''' Invokes the GetFieldType method of the underlying datareader.
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''' </summary>
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Public Function GetFieldType(ByVal Name As String) As System.Type
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetFieldType(mIndex)
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End Function
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''' <summary>
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''' Gets a Single value from the datareader.
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''' </summary>
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Public Function GetFloat(ByVal i As Integer) As Single Implements System.Data.IDataReader.GetFloat
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If mDataReader.IsDBNull(i) Then
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Return 0
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Else
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Return mDataReader.GetFloat(i)
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End If
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End Function
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''' <summary>
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''' Gets a Single value from the datareader.
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''' </summary>
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Public Function GetFloat(ByVal Name As String) As Single
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetFloat(mIndex)
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End Function
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''' <summary>
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''' Gets a Short value from the datareader.
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''' </summary>
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Public Function GetInt16(ByVal i As Integer) As Short Implements System.Data.IDataReader.GetInt16
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If mDataReader.IsDBNull(i) Then
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Return 0
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Else
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Return mDataReader.GetInt16(i)
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End If
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End Function
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''' <summary>
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''' Gets a Short value from the datareader.
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''' </summary>
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Public Function GetInt16(ByVal Name As String) As Short
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetInt16(mIndex)
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End Function
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''' <summary>
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''' Gets a Long value from the datareader.
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''' </summary>
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Public Function GetInt64(ByVal i As Integer) As Long Implements System.Data.IDataReader.GetInt64
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If mDataReader.IsDBNull(i) Then
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Return 0
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Else
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Return mDataReader.GetInt64(i)
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End If
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End Function
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''' <summary>
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''' Gets a Long value from the datareader.
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''' </summary>
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Public Function GetInt64(ByVal Name As String) As Long
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mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
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Return Me.GetInt64(mIndex)
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End Function
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''' <summary>
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''' Invokes the GetName method of the underlying datareader.
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''' </summary>
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Public Function GetName(ByVal i As Integer) As String Implements System.Data.IDataReader.GetName
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Return mDataReader.GetName(i)
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End Function
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''' <summary>
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''' Gets an ordinal value from the datareader.
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''' </summary>
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Public Function GetOrdinal(ByVal name As String) As Integer Implements System.Data.IDataReader.GetOrdinal
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Return mDataReader.GetOrdinal(name)
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End Function
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''' <summary>
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''' Invokes the GetSchemaTable method of the underlying datareader.
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''' </summary>
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Public Function GetSchemaTable() As System.Data.DataTable Implements System.Data.IDataReader.GetSchemaTable
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Return mDataReader.GetSchemaTable
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End Function
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|
|
|
''' <summary>
|
|
''' Invokes the GetValues method of the underlying datareader.
|
|
''' </summary>
|
|
Public Function GetValues(ByVal values() As Object) As Integer Implements System.Data.IDataReader.GetValues
|
|
Return mDataReader.GetValues(values)
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' Returns the IsClosed property value from the datareader.
|
|
''' </summary>
|
|
Public ReadOnly Property IsClosed() As Boolean Implements System.Data.IDataReader.IsClosed
|
|
Get
|
|
Return mDataReader.IsClosed
|
|
End Get
|
|
End Property
|
|
|
|
''' <summary>
|
|
''' Invokes the IsDBNull method of the underlying datareader.
|
|
''' </summary>
|
|
Public Function IsDBNull(ByVal i As Integer) As Boolean Implements System.Data.IDataReader.IsDBNull
|
|
Return mDataReader.IsDBNull(i)
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' Invokes the IsDBNull method of the underlying datareader.
|
|
''' </summary>
|
|
Public Function IsDBNull(ByVal Name As String) As Boolean
|
|
mIndex = Me.GetOrdinal(Name.ToUpper(System.Globalization.CultureInfo.InvariantCulture))
|
|
Return Me.IsDBNull(mIndex)
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' Returns a value from the datareader.
|
|
''' </summary>
|
|
''' <remarks>
|
|
''' Returns Nothing if the value is null.
|
|
''' </remarks>
|
|
Default Public Overloads ReadOnly Property Item(ByVal name As String) As Object Implements System.Data.IDataReader.Item
|
|
Get
|
|
Dim value As Object = mDataReader.Item(name)
|
|
If DBNull.Value.Equals(value) Then
|
|
Return Nothing
|
|
Else
|
|
Return value
|
|
End If
|
|
End Get
|
|
End Property
|
|
|
|
''' <summary>
|
|
''' Returns a value from the datareader.
|
|
''' </summary>
|
|
''' <remarks>
|
|
''' Returns Nothing if the value is null.
|
|
''' </remarks>
|
|
Default Public Overloads ReadOnly Property Item(ByVal i As Integer) As Object Implements System.Data.IDataReader.Item
|
|
Get
|
|
If mDataReader.IsDBNull(i) Then
|
|
Return Nothing
|
|
Else
|
|
Return mDataReader.Item(i)
|
|
End If
|
|
End Get
|
|
End Property
|
|
|
|
''' <summary>
|
|
''' Returns the RecordsAffected property value from the underlying datareader.
|
|
''' </summary>
|
|
Public ReadOnly Property RecordsAffected() As Integer Implements System.Data.IDataReader.RecordsAffected
|
|
Get
|
|
Return mDataReader.RecordsAffected
|
|
End Get
|
|
End Property
|
|
End Class
|
|
|
|
End Namespace
|