Export GridView to Excel Complete Code!

Here is the complete code to Export GridView to Excel:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class ExportGridView : System.Web.UI.Page {
  protected void Page_Load(object sender, EventArgs e) {
    if (!Page.IsPostBack) {
      GridView1.DataSource = BindData();
      GridView1.DataBind();
    }
  }

  private string ConnectionString {
    get {
      return @"Server=localhost;Database=Northwind;
        Trusted_Connection=true";
    }
  }

  private DataSet BindData() {
    // make the query
    string query = "SELECT * FROM Categories";
    SqlConnection myConnection = new SqlConnection(ConnectionString);
    SqlDataAdapter ad = new SqlDataAdapter(query, myConnection);
    DataSet ds = new DataSet();
    ad.Fill(ds, "Categories");
    return ds;
  }

  protected void Button1_Click(object sender, EventArgs e) {
    Response.Clear();

        Response.AddHeader("content-disposition", "attachment;
        filename=FileName.xls");

        Response.Charset = "";

        // If you want the option to open the Excel file without saving than

        // comment out the line below

        // Response.Cache.SetCacheability(HttpCacheability.NoCache);

        Response.ContentType = "application/vnd.xls";

        System.IO.StringWriter stringWrite = new System.IO.StringWriter();

        System.Web.UI.HtmlTextWriter htmlWrite =
        new HtmlTextWriter(stringWrite);

        GridView1.RenderControl(htmlWrite);

        Response.Write(stringWrite.ToString());

        Response.End();
  }

  public override void VerifyRenderingInServerForm(Control control) {
    // Confirms that an HtmlForm control is rendered for the
    specified ASP.NET server control at run time.
  }
}
posted on Wednesday, December 21, 2005 11:06 PM
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