Reportviewer with Subreport - Error processing subreport

Question

protected void Page_Load(object sender, EventArgs e)
{
    if (IsPostBack == true)
    {

        Sipom.DataSets.RelatorioTableAdapters.TodasTabelasTableAdapter Tabela = new
        Sipom.DataSets.RelatorioTableAdapters.TodasTabelasTableAdapter();
        Sipom.DataSets.Relatorio.TodasTabelasDataTable data = Tabela.GetDataTodos();

        ReportViewer1.LocalReport.Refresh();

        ReportViewer1.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SetSubDataSource);

    } 

    public void SetSubDataSource(object remetente, SubreportProcessingEventArgs e)
    {

        Sipom.DataSets.RelatorioTableAdapters.TodasTabelasTableAdapter Tabela = new Sipom.DataSets.RelatorioTableAdapters.TodasTabelasTableAdapter();
        Sipom.DataSets.Relatorio.TodasTabelasDataTable data = Tabela.GetDataTodos();
        ReportDataSource RDS1 = new ReportDataSource("DSRespostas", (System.Data.DataTable)data);
        ReportViewer1.LocalReport.DataSources.Add(RDS1); }

With this code I am trying to process the sub-report but the error appears in the following line: ReportViewer1.LocalReport.DataSources.Add(RDS1);

ERROR:

An Exception of type 'System.Invalidoperationexception' occurred in Microsoft.ReportViewer.Webforms.dll but was not handled in user code

Additional information: The viewer control object is in read-only mode

Can anyone help me? I’m not managing to solve this problem. What I want is to load the main report with the sub-report using the tableadpater.

Answer 1

Opa,

In his method SetSubDataSource try adding Datasource using the "e" you received as a parameter, for example, instead of doing:

ReportViewer1.LocalReport.DataSources.Add(RDS1);

Try changing to:

e.DataSources.Add(RDS1);

If it works, mark the answer as valid. Thanks!