server/AyaNova/util/FileUtil.cs

@@ -644,6 +644,19 @@ namespace AyaNova.Util
             return DateTime.Now.ToString("yyyyMMddHHmmssfff");
         }
 
+        public static string StringToSafeFileName(string fileName)
+        {//https://stackoverflow.com/a/3678296/8939
+            if (string.IsNullOrWhiteSpace(fileName))
+                return "no_name";
+
+            char[] invalidFileNameChars = Path.GetInvalidFileNameChars();
+            // Builds a string out of valid chars and an _ for invalid ones
+            var ret = new string(fileName.Select(ch => invalidFileNameChars.Contains(ch) ? '_' : ch).ToArray());
+            if (string.IsNullOrWhiteSpace(ret))
+                return "no_name";
+
+            return ret;
+        }
         #endregion general utilities
 
     }//eoc