protected void btnSearch_OnClick(object sender, EventArgs e)
{
objReportBiz = new ReportBiz();
ReportDocument rd = new ReportDocument();
CompanyInformation objClass = new CompanyInformation();
DataTable dt = new DataTable();
dt = objReportBiz.InvoicewisePurchaseDetails(txtInvoiceNumber.Text.Trim());
rd.Load(Server.MapPath("InvoicewisePurchaseDetail.rpt"));
//Property for Header And Footer - Start
TextObject txtCompanyName = rd.ReportDefinition.ReportObjects["txtCompanyName"] as TextObject;
txtCompanyName.Text = objClass.txtCompanyName;
TextObject txtTradeLicense = rd.ReportDefinition.ReportObjects["txtTradeLicence"] as TextObject;
txtTradeLicense.Text = objClass.txtTradeLicense;
TextObject txtCompanyAddress = rd.ReportDefinition.ReportObjects["txtCompanyAddress"] as TextObject;
txtCompanyAddress.Text = objClass.txtCompanyAddress;
//Property for Header And Footer - End
rd.SetDataSource(dt);
Session["CrystalReport"] = rd;
ScriptManager.RegisterStartupScript(Page, typeof(Page), "OpenWindow",
"window.open('../ReportViewer.aspx');", true);
}