Oct 22, 2009 11:46 PM|Zong-Qing Li - MSFT|LINK
Based on my test, please remove "if (!IsPostBack)" block , then test it.
protected void Page_Load(object sender, EventArgs e)
ReportViewer1.ProcessingMode = ProcessingMode.Local;
ReportViewer1.LocalReport.ReportPath = "Report2.rdlc";
ReportViewer1.Drillthrough += new Microsoft.Reporting.WebForms.DrillthroughEventHandler(ReportViewer1_Drillthrough);
void ReportViewer1_Drillthrough(object sender, Microsoft.Reporting.WebForms.DrillthroughEventArgs e)
For more information about "Configuring Subreports and Drillthrough Reports", please refer to
Please feel free to let me know if I’ve misunderstood anything.