Crystal Report

[Harinder Dhamija]

Hi,
I'm using the following code to Export the crystal report but it exporting
blank page.
protected void Page_Load(object sender, EventArgs e)
{
ReportDocument oReport = new ReportDocument();
if (!Page.IsPostBack)
{
oReport.Load(Server.MapPath("Reports/rptCropSoil.rpt"));
Crtv.ReportSource = oReport;
}
ViewState["CrtvDataSource"] = oReport;
}
protected void BtnExport_Click(object sender, ImageClickEventArgs e)
{
ReportDocument oReport = new ReportDocument();
oReport = (ReportDocument)ViewState["CrtvDataSource"];
oReport.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response,
true, "Your Exported File Name");
}

This code is saving Blank page on my system. But if i provide the complete
code on page_load i.e.

ReportDocument oReport = new ReportDocument();
if (!Page.IsPostBack)
{
oReport.Load(Server.MapPath("Reports/rptCropSoil.rpt"));
oReport.ExportToHttpResponse(ExportFormatType.PortableDocFormat,
Response, true, "Your Exported File Name");
}

than Working fine. But i want to perform this on Button click. Please help
me.


Thank you so much