GridView SelectedData key runtime error.

"string FolderID = grdCalls.SelectedDataKey[0].ToString() "


It will not show you a Compile time error Because at a time of compilation compiler doesn't know Either you have used multiple Datakeys or not.

i.e

DataKeyNames=CustID,ProductID

If you have used single DataKeys i.e

DataKeyNames = CustID

then you dont need to pass Index at codeside,

You can pass the index if you have used multiple keys as described above.

Hope it helps.

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