zahraf
جمعه 25 تیر 1389, 21:03 عصر
از يك template استفاده كردم به اين صورت
<asp:TemplateField HeaderText="فایل پیوست">
<ItemTemplate>
<asp:ImageButton ID="LinkButton1" runat="server"
CommandName="DoDownload" ImageUrl="pic/downBTN-1.gif" CommandArgument='<%# Bind("extra") %>' ></asp:ImageButton>
</ItemTemplate></asp:TemplateField>
كه extra آدرس فايلم در ديتابيس هست و بعد در رويداد RowCommand نوشتم:
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "DoDownload")
{
Response.Redirect(e.CommandArgument.ToString());
}
}
ولي وقتي روي دكمه ي ديتاگريدم كليك ميكنم صفحه اي نمايش داده ميشه كه توش نوشته:
Server Error in '/WebSite1' Application.
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation