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The Data Grid View control available as a part of Windows Forms controls in Visual Studio 2008 is much more powerful than it's previous versions.
column, its value is tested for validity by checking that it is not empty.
dim my Data Table as Data Table dim tmp Str as String dim s ID as Integer = 1 ... Get Data() ' Reads the data from MS-Access table ... Rows tmp Str = name Item("lastname") " " name Item("initials") If my Item("s ID")=s ID Then ' Do something End If ' print tmp Str Next Microsoft came up with DBNull in . However, it's a pain in the behind to use because you can't create a strongly-typed variable to store a genuine value or null. Just a suggestion, but what I normally do is this: While reader. Add(New DDLItem( _ CType(reader("rid"), Integer), _ CType(reader("Item_Status"), String), _ CType(reader("Text_Show"), String), _ CType( IIf(Is DBNull(reader("Text_Use")), "", reader("Text_Use")) , String), _ CType(reader("Text_System Only"), String), _ CType(reader("Parent_rid"), Integer))) End While VB.
However, you are still stuck with large chunks of API that use DBNull, and they can't be changed.
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