Error - gvdetails of GridView must be inside of Form tag with runnat = Server

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Why error is giving int the line gvdetails.RenderControl(htw)? AND tell gvdetails of GridView must be inside of Form tag with runnat = Server

HTML CODE GIVEN BELOW

ASP.NET

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Export Data from Grid to Word and Excel.aspx.cs" Inherits="Export_Data_from_Grid_to_Word_and_Excel" %>

<!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></title>
</head>
<body>
    <form id="form1"  runat="server">
    <div align="center">
    
        <br />
        <br />
        <asp:ImageButton ID="btWord" runat="server" Width="98px" 
            ImageUrl="~/word_icon[1].png" Height="93px" onclick="ImageButton1_Click" />
     
        <asp:ImageButton ID="btExcel" runat="server" Width="119px" 
            ImageUrl="~/excel[1].gif" Height="108px" onclick="ImageButton2_Click" />
        <asp:GridView ID="gvdetails" runat="server" AllowPaging="True" 
            AutoGenerateColumns="False" DataKeyNames="qid" 
            DataSourceID="SqlDataSource1" BackColor="White" BorderColor="#E7E7FF" 
            BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Horizontal" 
            Width="260px">
            <AlternatingRowStyle BackColor="#F7F7F7" />
            <Columns>
                <asp:BoundField DataField="qid" HeaderText="qid" SortExpression="qid" 
                    ReadOnly="True" />
                <asp:BoundField DataField="qname" HeaderText="qname" 
                    SortExpression="qname" />
                <asp:BoundField DataField="sid" HeaderText="sid" SortExpression="sid" />
                <asp:BoundField DataField="aid" HeaderText="aid" SortExpression="aid" />
                <asp:BoundField DataField="cid" HeaderText="cid" SortExpression="cid" />
                <asp:BoundField DataField="class" HeaderText="class" SortExpression="class" />
            </Columns>
            <FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />
            <HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#F7F7F7" />
            <PagerStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" HorizontalAlign="Right" />
            <RowStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" />
            <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="#F7F7F7" />
            <SortedAscendingCellStyle BackColor="#F4F4FD" />
            <SortedAscendingHeaderStyle BackColor="#5A4C9D" />
            <SortedDescendingCellStyle BackColor="#D8D8F0" />
            <SortedDescendingHeaderStyle BackColor="#3E3277" />
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
            ConnectionString="<%$ ConnectionStrings:tuitionConnectionString %>" 
            SelectCommand="SELECT * FROM [question]"></asp:SqlDataSource>
        <br />
    
    </div>
    </form>
</body>
</html>

SEE MY CS CODE IS GIVEN BELOW FOR THIS

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;

public partial class Export_Data_from_Grid_to_Word_and_Excel : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        gvdetails.AllowPaging = false;

        gvdetails.DataBind();

        Response.ClearContent();

        Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "Customers.doc"));

        Response.Charset = "";

        Response.ContentType = "application/ms-word";

        StringWriter sw = new StringWriter();

        HtmlTextWriter htw = new HtmlTextWriter(sw);

        gvdetails.RenderControl(htw);

        Response.Write(sw.ToString());

        Response.End();
    }
    protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
    {
        Response.ClearContent();

Response.Buffer = true;

Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "Customers.xls"));

Response.ContentType = "application/ms-excel";

StringWriter sw = new StringWriter();

HtmlTextWriter htw = new HtmlTextWriter(sw);

gvdetails.AllowPaging = false;

gvdetails.DataBind();

gvdetails.HeaderRow.Style.Add("background-color", "#FFFFFF");

for (int i = 0; i < gvdetails.HeaderRow.Cells.Count; i++)

{

gvdetails.HeaderRow.Cells[i].Style.Add("background-color", "#507CD1");

}

int j = 1;

foreach (GridViewRow gvrow in gvdetails.Rows)

{

gvrow.BackColor = Color.White;

if (j <= gvdetails.Rows.Count)

{

if (j % 2 != 0)

{

for (int k = 0; k < gvrow.Cells.Count; k++)

{

gvrow.Cells[k].Style.Add("background-color", "#EFF3FB");

}

}

}

j++;

}

gvdetails.RenderControl(htw);

Response.Write(sw.ToString());

Response.End();
    }
}

Posted 30-Dec-11 21:46pm

Janardan Pandey

Updated 30-Dec-11 23:28pm

Mehdi Gholam

v2

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Comments

OriginalGriff 31-Dec-11 3:54am

Don't start a new question to give better information, and format your answer correctly, useing code blocks - I did it for you last time!
Instead, use the "Improve question" widget to edit your question and provide better information.

I will delete the original question.

OriginalGriff 31-Dec-11 3:56am

On second thoughts, I won't - so you can see what the difference is between your code formatted and unformatted...

1 solution

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Supriya Srivastav · Accepted Answer · 2011-12-30T22:50:00

Use the code below,

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
   {
       ConvertXL(Response);
   }
   public void ConvertXL(HttpResponse Response)
   {
       try
       {
           gvdetails.SelectedIndex = -1;
           Response.Clear();
           HtmlForm form = new HtmlForm();
           string attachment = "attachment;filename=UserLogDetails.xls";
           Response.ClearContent();
           Response.AddHeader("content-disposition", attachment);
           Response.ContentType = "application/vnd.xls";
           StringWriter stw = new StringWriter();
           HtmlTextWriter htextw = new HtmlTextWriter(stw);
           form.Controls.Add(gvdetails);
           this.Controls.Add(form);
           form.RenderControl(htextw);
           Response.Write(stw.ToString());
           Response.End();
       }
       catch (Exception ex)
       {
           return;
       }
   }

And for export to Word use

Response.ContentType = "application/ms-word";