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Control 'GridView1' of type 'GridView' must be placed inside a form tag with runat=server.

Hi,

I am getting the following error:

Control 'GridView1' of type 'GridView' must be placed inside a form tag with runat=server.

below is the code:

protected void Page_Load(object sender, EventArgs e)
{
System.IO.StringWriter tw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);

DataBridge.PrismPanc pp = new PrismPanc();
System.Data.DataTable dtExport = pp.GetTodaysData();
GridView1.DataSource = dtExport;
GridView1.DataBind();

Excel.Application oXl;
Excel._Workbook oWb;
Excel._Worksheet oSheet;

hw.WriteLine("<b><u><font size='5'>" +
"Report for the Fiscal year: </font></u></b>");
hw.WriteLine("<br>&mp;nbsp;");

GridView1.HeaderStyle.Font.Bold = true;
GridView1.DataBind();
GridView1.RenderControl(hw); //<-----generating the above error message

// Write the HTML back to the browser.
Response.ContentType = "application/vnd.ms-excel";
this.EnableViewState = false;
Response.Write(tw.ToString());
Response.End();

gangwisch

you need to post your designer code but must likely you need to have it in this format
<form runat="server">
<asp:gridview>...
</form>

brdrok

ASKER

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
 </div>
<asp:GridView ID="GridView1" runat="server" Height="263px" Width="633px">
</asp:GridView>
</form>
</body>
</html>

The GridView is within the <form...> and </form> tags.

ASKER CERTIFIED SOLUTION

brwwiggins

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craskin

you're databinding gridview1 twice.

brdrok

ASKER

I am not exactly sure what this whole enableEventValidation bit is all about but turning it to false seems to do the trick.

enableEventValidation ="false"