Question

Currently i am trying to export the data from the data table to the excel sheet in c# asp.net mvc3. I surf on the internet and found some codes to export the datatable to the excel sheet. It executes with out any error. But no excel sheet will be created. Any suggestions to do this.

            string filename = "DownloadMobileNoExcel.xls";
            DataGrid dgGrid = new DataGrid();
            dgGrid.DataSource = dt;
            dgGrid.DataBind();
            Response.Clear();
            Response.AddHeader("content-disposition", "attachment;filename=" 
              + filename + "");
            Response.Charset = "";
            Response.Cache.SetCacheability(HttpCacheability.NoCache);
            Response.ContentType = "application/vnd.ms-excel";

            //Convert the rendering of the gridview to a string representation 
            StringWriter sw = new StringWriter();
            HtmlTextWriter htw = new HtmlTextWriter(sw);
            dgGrid.RenderControl(htw);

            //Open a memory stream that you can use to write back to the response
            byte[] byteArray = Encoding.ASCII.GetBytes(sw.ToString());
            MemoryStream s = new MemoryStream(byteArray);
            StreamReader sr = new StreamReader(s, Encoding.ASCII);

            //Write the stream back to the response
            Response.Write(sr.ReadToEnd());
            Response.End();

Answer 1

protected void ExportToExcel(object sender, EventArgs e)
{

    //Get the data from database into datatable
    string strQuery = "select CustomerID, ContactName, City, PostalCode" +" from customers";
    SqlCommand cmd = new SqlCommand(strQuery);
    DataTable dt = GetData(cmd);
    //Create a dummy GridView
    GridView GridView1 = new GridView();
    GridView1.AllowPaging = false;
    GridView1.DataSource = dt;
    GridView1.DataBind();
    Response.Clear();
    Response.Buffer = true;
    Response.AddHeader("content-disposition","attachment;filename=DataTable.xls");
    Response.Charset = "";
    Response.ContentType = "application/vnd.ms-excel";
    StringWriter sw = new StringWriter();
    HtmlTextWriter hw = new HtmlTextWriter(sw);
    for (int i = 0; i < GridView1.Rows.Count; i++)
    {
        //Apply text style to each Row
        GridView1.Rows[i].Attributes.Add("class", "textmode");
    }
    GridView1.RenderControl(hw);
    //style to format numbers to string
    string style = @"<style> .textmode { mso-number-format:\@; } </style>";
    Response.Write(style);
    Response.Output.Write(sw.ToString());
    Response.Flush();
    Response.End();
}

Source: http://www.aspsnippets.com/Articles/Export-DataSet-or-DataTable-to-Word-Excel-PDF-and-CSV-Formats.aspx