I have an ajax modal popup extender in update panel. The modal popup extender has a label , checkbox and a dropdown list. When i open the popup first time (i.e Page_load) and select something and click on ok the data is populated correctly in another grid. If i open the popup second time and select some data and click on ok it is populating the grid with the current selected data as well as previously selected data. Please provide me with the solution with this issue..
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