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I have a gridview where i have a radio button. What i need is to on the selection of the radiobutton i have to find the datakey of the gridview. Also one more issue with that is , i can select more than one radio button, which should not happen.
You need to use a literal control to inject radio button markup.
This will handle grouping so only one radio button is selected.
You cannot do it with the standard radio control group.
See this for a complete example with working code:
http://www.asp.net/data-access/tutorials/adding-a-gridview-column-of-radio-buttons-vb