Updatepanel gives web request manager error

I am using a radiolist control in my wep page. and there is 3 update panel in that web page. Each update panel contains a list box. All the 3 update panels have a AsyncPostBackTrigger (radiolist index changed event).

my problems is开发者_如何学运维 i get an error randomly

   Sys.WebForms.PageRequestManagerServerErrorException: Input string was not in a correct format. 

any ideas??

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I guess you are internally assigning a string value to the integer data type. In that case you have to use the TryParse method. Please find the code snippet below which may help you

int integerValue= 0;

int.TryParse(value, out integerValue);

Hope this should resolve your issue.