Exporting grid to excel - asp.net

Question

I used this code for exploring grid to excel.I got this code from net.
protected void Button1_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.xls");
Response.Charset = "";
Response.ContentType = "application/vnd.ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView1.AllowPaging = false;
GridView1.DataBind();
GridView1.RenderControl(hw);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
}
When I am using this code,grid data get display in excel,but that does not have vertical and horizontal lines.It shows gridview column name as link not normal text.I have not used any theme to gridview and columns are autogenerated.One column say col3 contain more description so it's data get displayed at top when second row start,still it's discription shown in cell2.So I wanted to add vertical and horizontal lines,in that.So it is easy to come to know which data of belong to which id.I want to format col 1 also which is of number format only and decimal places zero.
1 col1 col2 col3
hjhhjhjhjhjhjhjhjhjhjbbv
gfgfgfuiuiuiuiui
2 9.12E+11 gkjj etwtrtrwqtrtttwwtretqwfe
dear member
gffgf
3 565E+11 hghgh

Answer 1

Bind grid data on page load event and then try to export again.. follow this link's code.. may be it will be good rather than others...
Exporting GridView Data to Excel
Code Snippet:
private void ExportGridView()
{
string attachment = "attachment; filename=Contacts.xls";
Response.ClearContent();
Response.AddHeader("content-disposition", attachment);
Response.ContentType = "application/ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
GridView1.RenderControl(htw);
Response.Write(sw.ToString());
Response.End();
}
Note: There are some comments also posted which also have some information..
To Format GridView according to grid controls when you are exporting data to excel then follow the below link:
ASP.Net 2.0: Export GridView to Excel