Export to Excel in ASP.Net

Posted: May 25, 2007 in ASP.Net

This is code for exporting a DataSet content into excel report and sending it to client through browser. The client should have Office 2003 atleast installed on this system.

A excel file will be initially created at the server end and then it is sent to the client through the browser.

Also, the thread abort exception occurs here because we are causing the Response to end. So, we need to suppress the exception.

#region Export to Excel
public void CreateExcelReport(DataSet ds, string reportName)
{
if (ds != null && ds.Tables.Count > 0)
{
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
string path = System.IO.Path.GetTempPath();
System.IO.FileStream fs = new System.IO.FileStream((path + “/” + reportName), System.IO.FileMode.OpenOrCreate);
try
{
//Clear the Response
Response.Clear();
//Set the Response headers
Response.AppendHeader(“Content-Type”, “application/vnd.ms-excel”);
Response.AppendHeader(“Content-Disposition”, “attachment; filename=” + fs.Name);
Response.Charset = “”;
//Create an instance of GridView
GridView gridView = new GridView();
//Iterating through each DataTable within the DataSet
foreach (DataTable dataTbl in ds.Tables)
{
gridView.DataSource = dataTbl;
gridView.DataBind();
}
//Output the gridView contents into HtmlWriter
gridView.RenderControl(htmlWrite);
Response.Write(stringWrite);
Response.End();
}
catch (System.Threading.ThreadAbortException te)
{
//Suppress ThreadAbort exception
}
finally
{
//Cleanup the objects
stringWrite.Close();
htmlWrite.Close();
fs.Close();
}
}
}
#endregion

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