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C# 子报表处理事件未触发

c# wpf

C# 子报表处理事件未触发,c#,wpf,rdlc,subreport,C#,Wpf,Rdlc,Subreport,我在WPF中使用rdlc报告，所以我使用WindowsFormsHost包装器。我正在寻找的rdlc报告中嵌入了一个子报告，我正在使用ReportViewer的SubreportProcessing事件设置该子报告的数据源 Viewer.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(LoadAccessoriesSubReport); private void PrepareReport(V

我在WPF中使用rdlc报告，所以我使用WindowsFormsHost包装器。我正在寻找的rdlc报告中嵌入了一个子报告，我正在使用ReportViewer的SubreportProcessing事件设置该子报告的数据源

Viewer.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(LoadAccessoriesSubReport);

    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;
我的问题是SubreportProcessing事件甚至没有被触发。我在包含嵌入式ReportViewer控件的WPF窗口的
窗口\u Loaded
事件中定义它，请参见下面的xaml：

       Title="ReportViewer" Height="1000" Loaded="Window_Loaded" Width="1000">
<Grid>
    <WindowsFormsHost Name="winHost">
        <wf:ReportViewer  Dock="Fill" Name="rptViewer">
        </wf:ReportViewer>  
    </WindowsFormsHost>                   
</Grid>

    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;

Title=“ReportViewer”Height=“1000”load=“Window\u load”Width=“1000”>
如果您能在这方面提供帮助，我将不胜感激。

我也遇到了同样的问题，在WPF应用程序中使用LocalReport而不使用ReportViewer

    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;
但结果是，我试图将空值作为参数从父报表传递到子报表

    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;
因此，子报表从未开始呈现。这就是事件未触发的原因。

检查子报表参数。如果参数条件失败，则不会加载子报表。 
    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;
还要检查Visual Studio跟踪输出，它会显示导致错误的参数

    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;
为了执行快速检查，请将所有子报表参数设置为允许null

    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;
它帮了我的忙（现在，我只需要理解为什么我会得到一个空值而不是期望的值：）

尝试设置ReportName属性以匹配报表文件名。

这里也有同样的问题，尽管这个问题可能有点老了。。 
    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;
如果要从代码隐藏分配数据源，请确保在将数据源添加到主报表后添加SubreportProcessing事件的处理程序。我是这样做的：

Dim rpDataSource As New ReportDataSource("sourceMain", myDataTable1)
Dim rpDataSourceSub As New ReportDataSource("sourceSub", myDataTable2)

ReportViewer1.ProcessingMode = ProcessingMode.Local
ReportViewer1.LocalReport.EnableHyperlinks = False
ReportViewer1.Reset()
Me.ReportViewer1.LocalReport.ExecuteReportInCurrentAppDomain(AppDomain.CurrentDomain.Evidence)
ReportViewer1.LocalReport.ReportPath = "Reports\report1.rdlc"
ReportViewer1.LocalReport.DisplayName = "Report" + Today.ToString("dd-MM-yyyy")
ReportViewer1.LocalReport.Refresh()

If Not ReportViewer1.LocalReport.DataSources.Contains(rpDataSource) Then
  ReportViewer1.LocalReport.DataSources.Add(rpDataSource)
End If

If Not ReportViewer1.LocalReport.DataSources.Contains(rpDataSourceSub) Then
  ReportViewer1.LocalReport.DataSources.Add(rpDataSourceSub)
End If

AddHandler Me.ReportViewer1.LocalReport.SubreportProcessing, AddressOf Me.SetSubDataSource
Me.ReportViewer1.LocalReport.Refresh()

    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;
我以前被添加到AddHandler部分，但该事件从未被触发。希望这能帮助有同样问题的人。

在主报表和子报表自身的子报表控件上添加匹配参数

    private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;
  • 在主报表上，右键单击子报表控件->属性…->添加“InvoiceId”“[InvoiceId]”
  • 在子报表->单击任意位置->查看->报表数据->参数->添加“发票ID”
    • 这就是我设法使它工作的方式，可能不是最好的解决方案……它使用EF和WPF

        private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;

    private void PrepareReport（查看TravelOrderEmployees travelOrder）
{
实体=新实体（）；
this.mform_components=new System.ComponentModel.Container（）；
Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1=新的Microsoft.Reporting.WinForms.ReportDataSource（）；
Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2=新的Microsoft.Reporting.WinForms.ReportDataSource（）；
this.ProductBindingSource=new System.Windows.Forms.BindingSource（this.mform\u组件）；
this.ProductBindingSource2=new System.Windows.Forms.BindingSource（this.mform\u组件）；
reportDataSource1.Name=“ViewTravelOrderEmployees”；
reportDataSource1.Value=this.ProductBindingSource；
//DAL_目的地是rdlc中的子报表->属性->常规->名称
reportDataSource2.Name=“DAL_目的地”；
reportDataSource2.Value=this.ProductBindingSource2；
this.reprt.LocalReport.DataSources.Add（reportDataSource1）；
this.reprt.LocalReport.DataSources.Add（reportDataSource2）；
this.reprt.LocalReport.SubreportProcessing+=新的SubreportProcessingEventHandler（SubreportProcessingEventHandler）；
this.reprt.LocalReport.ReportEmbeddedResource=“PNWPF.TravelOrder.rdlc”；
字符串exeFolder=System.IO.Path.GetDirectoryName（System.Windows.Forms.Application.StartupPath）；
字符串reportPath=System.IO.Path.Combine（exeFolder，@“Reports\TravelOrder.rdlc”）；
this.reprt.LocalReport.ReportPath=ReportPath；
this.ProductBindingSource.DataSource=travelOrder；
this.reprt.RefreshReport（）；
}
无效SubreportProcessingEventHandler（对象发送方，SubreportProcessingEventArgs e）
{
实体=新实体（）；
字符串dataSourceName=e.DataSourceNames[0]；
//查询需要完成这只是一个例子
List destinations=entities.destinations.ToList（）；
e、 添加（新的ReportDataSource（dataSourceName，destinations））；
}
PNA实体；
private System.ComponentModel.IContainer mform_components=null；
private System.Windows.Forms.BindingSource产品BindingSource；
private System.Windows.Forms.BindingSource产品BindingSource2；
    XAML

        private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;

    我也遇到了同样的问题，发现
    ReportViewer1.Reset（）
    正在清除事件处理程序。在
    ReportViewer1.Reset（）之后立即将AddHandler行移动到解决了问题。
    我也有同样的问题。我还没有找到一个解决方案……虽然没有直接回答我的问题，但问题的细节回答了我的问题。谢谢+1你的回答引导我走向正确的方向，谢谢。现在我知道主报表和子报表中的参数（即用作子报表的报表文件和子报表属性中的子报表参数）出现任何问题都会阻止事件的引发。

        private void PrepareReport(ViewTravelOrderEmployees travelOrder)
    {
        entities = new PNEntities();            

        this.mform_components = new System.ComponentModel.Container();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource();
        Microsoft.Reporting.WinForms.ReportDataSource reportDataSource2 = new Microsoft.Reporting.WinForms.ReportDataSource();

        this.ProductBindingSource = new System.Windows.Forms.BindingSource(this.mform_components);
        this.ProductBindingSource2 = new System.Windows.Forms.BindingSource(this.mform_components);            

        reportDataSource1.Name = "ViewTravelOrderEmployees";
        reportDataSource1.Value = this.ProductBindingSource;
        //DAL_Destination is Subreport -> Properties -> General -> Name in rdlc
        reportDataSource2.Name = "DAL_Destinations";
        reportDataSource2.Value = this.ProductBindingSource2;

        this.reprt.LocalReport.DataSources.Add(reportDataSource1);
        this.reprt.LocalReport.DataSources.Add(reportDataSource2);

        this.reprt.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SubreportProcessingEventHandler);            

        this.reprt.LocalReport.ReportEmbeddedResource = "PNWPF.TravelOrder.rdlc";
        string exeFolder = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);
        string reportPath = System.IO.Path.Combine(exeFolder, @"Reports\TravelOrder.rdlc");
        this.reprt.LocalReport.ReportPath = reportPath;

        this.ProductBindingSource.DataSource = travelOrder;            
        this.reprt.RefreshReport();             
    }

        void SubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        entities = new PNEntities();

        string dataSourceName = e.DataSourceNames[0];
        //query needs to be completed this is just example
        List<Destinations> destinations = entities.Destinations.ToList();            

        e.DataSources.Add(new ReportDataSource(dataSourceName, destinations));
    }

    PNEntities entities;
    private System.ComponentModel.IContainer mform_components = null;
    private System.Windows.Forms.BindingSource ProductBindingSource;
    private System.Windows.Forms.BindingSource ProductBindingSource2;