could not select subreport - .rdlc - VS 2010

问题

I had created many reports with VS 2008. Now starting with VS 2010 for new requirement. Please note I am using .rdlc report

• I could add subreport control to the report but could not select the available reports. There is no browse button or a dropdown to choose the available .rdlc report.

• When I manually type the report name, the reportviewer doesnt show up any subreport. I dont see any error message on the 'Output' window either.

How do I use subreport with VS 2010? Am I missing anything? Any help is appreciated.

I have SQL 2005/2008 (report services installed), VS 2008, VS 2010 installed on the same PC.

回答1:

First select sub report from Toolbox and put where you want to show.See the image bellow

Now right click on sub report properties and type your sub report name .

Now You have to create a sub report even handler in your .cs file from where you load your report like that:

public Ctor()
{
    string path = HttpContext.Current.Server.MapPath("Your Report path");
    ReportViewer1.Reset(); //important
    ReportViewer1.ProcessingMode = Microsoft.Reporting.WebForms.ProcessingMode.Local;
    ReportViewer1.LocalReport.SubreportProcessing += Process_Subreport;
    LocalReport objReport = ReportViewer1.LocalReport;
    objReport.ReportPath = path;

    // Add Parameter If you need 
    List<ReportParameter> parameters = new List<ReportParameter>();
    parameters.Add(new ReportParameter("Name", Value));
    ReportViewer1.LocalReport.SetParameters(parameters);
    ReportViewer1.ShowParameterPrompts = false;
    ReportViewer1.ShowPromptAreaButton = false;
    ReportViewer1.LocalReport.Refresh();

    //Add Datasourdce
    ReportDataSource reportDataSource = new ReportDataSource();
    reportDataSource.Name = "Datasource Name Used due to report design";
    reportDataSource.Value = DataSourceValue;
    objReport.DataSources.Add(reportDataSource);
    objReport.Refresh();
}

Now Create Even Handler Method to load sub report details.

private void Process_Subreport(object sender, SubreportProcessingEventArgs e)
{
  //You can get parameter from main report 
  int paramname = int.Parse(e.Parameters[0].Values[0].ToString());
  //You can also add parameter in sub report if you  need like main report

  //Now add sub report data source     
   e.DataSources.Add(new ReportDataSource("DataSource Name",DataSourceValue)));
 }

I think it will be works for you.Thank you.

来源：https://stackoverflow.com/questions/8582267/could-not-select-subreport-rdlc-vs-2010