Export data from GridView control to Excel file in C# ~ Programming Share

This is the complete source code to export data from a GridView control to Excel file in C#

        public static void Export(string fileName, GridView gv)
        {
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.AddHeader(
                "content-disposition", string.Format("attachment; filename={0}", fileName));
            HttpContext.Current.Response.ContentType = "application/ms-excel";

            using (System.IO.StringWriter sw = new System.IO.StringWriter())
            {
                using (System.Web.UI.HtmlTextWriter htw = new HtmlTextWriter(sw))
                {
                    // Create a form to contain the grid
                    Table table = new Table();
                    table.GridLines = gv.GridLines;

                    // add the header row to the table
                    if (gv.HeaderRow != null)
                    {
                        PrepareControlForExport(gv.HeaderRow);
                        table.Rows.Add(gv.HeaderRow);
                    }

                    // add each of the data rows to the table
                    foreach (GridViewRow row in gv.Rows)
                    {
                        PrepareControlForExport(row);
                        table.Rows.Add(row);
                    }

                    // add the footer row to the table
                    if (gv.FooterRow != null)
                    {
                        PrepareControlForExport(gv.FooterRow);
                        table.Rows.Add(gv.FooterRow);
                    }

                    // render the table into the htmlwriter
                    table.RenderControl(htw);

                    // render the htmlwriter into the response
                    HttpContext.Current.Response.Write(sw.ToString());
                    HttpContext.Current.Response.End();
                }
            }
        }

Add the following code to enable finding and converting any control to row

        private static void PrepareControlForExport(Control control)
        {
            for (int i = 0; i < control.Controls.Count; i++)
            {
                Control current = control.Controls[i];
                if (current is LinkButton)
                {
                    control.Controls.Remove(current);
                }
                else if (current is TextBox)
                {
                    control.Controls.Remove(current);
                }
                else if (current is ImageButton)
                {
                    control.Controls.Remove(current);
                }
                else if (current is HyperLink)
                {
                    control.Controls.Remove(current);
                }
                else if (current is Button)
                {
                    control.Controls.Remove(current);
                }
                else if (current is DropDownList)
                {
                    control.Controls.Remove(current);
                }
                else if (current is CheckBox)
                {
                    control.Controls.Remove(current);
                }
                if (current.HasControls())
                {
                    PrepareControlForExport(current);
                }
            }
        }

Add a button and generate a Click event to Export data

        protected void btnExport_Click(object sender, EventArgs e)
        {
            grid.PageSize = 100;
            Export("Employee.xls", this.grid);
        }

Hope this helps!