I am developing an application using Rad Controls.In this there is a rad grid which contains checkbox,on selection of it based on the id i am loading relevant data to the another radGrid next to it in the same page.
For the first time selection data is getting loaded properly,But on the next checkbox selection i am getting the error an item with the same key has already been added.
Can you please make sure that you are binding the RadGrid through the NeedDataSource event? Sharing your page markup as well as the related code behind will help us further investigate the issue and provide proper solution for your case.
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