Refresh Repeater When Click A Button in asp.net using visual basic

hi,

Now im facing a problem in write the code of refresh repeater(show comment) when i click submit comment button.

Im using Page.Response.Redirect(Page.Request.Url.ToString()) to refresh it.But have some problem occur which is the repeater wont refresh when i 1st time click the button.It just will refresh when i click the button again(mean click 2nd time).

 So who have the code to help me solve this problem..

Thanks
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