c# - To avoid re-run the code, click on Refresh page -

i have listview control in aspx page , control inside listview control:

<asp:linkbutton id="addtocart" runat="server" commandargument='<%# eval("productid") %>' oncommand="addtocart_click">add cart</asp:linkbutton>

and use code master page:

 <%@ page  enableviewstate="true" viewstatemode="disabled" ...

also, listview viewstatemode enabled. , code:

protected void addtocart_click(object sender, commandeventargs e)     {         //insert product cart table     }

first, i'll click on addtocart , code executed. (this ok) but, code re-runs (insert product cart table) when click on refresh page!!

you can redirect page addtocart_click callback.

response.redirect("pageurl.aspx");

Ben