LocalReport.SubreportProcessing 事件

發生在處理子報表時。

命名空間：  Microsoft.Reporting.WebForms
組件：  Microsoft.ReportViewer.WebForms (在 Microsoft.ReportViewer.WebForms.dll 中)

語法

'宣告
Public Event SubreportProcessing As SubreportProcessingEventHandler
'用途
Dim instance As LocalReport
Dim handler As SubreportProcessingEventHandler

AddHandler instance.SubreportProcessing, handler

public event SubreportProcessingEventHandler SubreportProcessing

public:
 event SubreportProcessingEventHandler^ SubreportProcessing {
    void add (SubreportProcessingEventHandler^ value);
    void remove (SubreportProcessingEventHandler^ value);
}

member SubreportProcessing : IEvent<SubreportProcessingEventHandler,
    SubreportProcessingEventArgs>

JScript 支援使用事件，但不支援新的宣告。

備註

SubreportProcessing 事件會針對主報表中的每個子報表執行個體而觸發，而不只是針對每個子報表定義觸發。如果報表包含來自同一個報表定義的多個子報表執行個體，這個事件會針對每個執行個體觸發。

您必須提供子報表所用之任何資料來源的資料。若要這麼做，您必須提供 SubreportProcessing 事件的事件處理常式。

您可以檢查 Parameters 屬性，提供對應於這些參數值的資料，來檢查傳給子報表的參數值。

如果主報表有多份子報表，您可以檢查 SubreportProcessingEventArgs 類別的 ReportPath 屬性來判斷正在處理的子報表，以及提供這份子報表的資料。

請參閱 SubreportProcessingEventArgs，以取得傳給這個事件處理常式之引數的描述。

範例

下列程式碼範例會實作使用子報表的主從式報表。此程式碼會載入一個包含子報表的範例報表，並設定事件處理常式來處理 SubreportProcessing 事件。傳遞至 SubreportProcessing 事件處理常式之引數包括封裝子報表的物件。事件處理常式會將資料來源執行個體加入至這個子報表，然後才會在 ReportViewer 控制項中將它轉譯。

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Microsoft.Reporting.WebForms;

public partial class _Default : System.Web.UI.Page 
{
    private DataTable orderDetailsData = null;

    private DataTable LoadOrdersData()
    {
        // Load data from XML file
        DataSet dataSet = new DataSet();
        dataSet.ReadXml(@"c:\My Reports\OrderData.xml");
        return dataSet.Tables[0];
    }

    private DataTable LoadOrderDetailsData()
    {
        // Load data from XML file
        DataSet dataSet = new DataSet();
        dataSet.ReadXml(@"c:\My Reports\OrderDetailData.xml");
        return dataSet.Tables[0];
    }

    void DemoSubreportProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
    {
        if (orderDetailsData == null)
            orderDetailsData = LoadOrderDetailsData();
        e.DataSources.Add(new ReportDataSource("DataSet1_OrderDetails", orderDetailsData));
    }
    
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            // Set RDL file
            ReportViewer1.LocalReport.ReportPath = 
                @"c:\My Reports\Orders.rdlc";

            // Supply a DataTable corresponding to each report dataset
            ReportViewer1.LocalReport.DataSources.Add(
                new ReportDataSource("DataSet1_Orders", 
                    LoadOrdersData()));
    }
    // Add a handler for SubreportProcessing
    ReportViewer1.LocalReport.SubreportProcessing += new 
        SubreportProcessingEventHandler(DemoSubreportProcessingEventHandler);

    }
}

using System;
Imports System.Data
Imports Microsoft.Reporting.WebForms

Partial Class _Default
    Inherits System.Web.UI.Page

    Dim orderDetailsData As DataTable = Nothing

    Private Function LoadOrdersData() As DataTable
        Dim dataSet As New DataSet()
        dataSet.ReadXml("c:\My Reports\OrderData.xml")
        LoadOrdersData = dataSet.Tables(0)
    End Function

    Private Function LoadOrderDetailsData()
        Dim dataSet As New DataSet()
        dataSet.ReadXml("c:\My Reports\OrderDetailData.xml")
        LoadOrderDetailsData = dataSet.Tables(0)
    End Function

    Public Sub DemoSubreportProcessingEventHandler(ByVal sender As Object, ByVal e As SubreportProcessingEventArgs)
        If (orderDetailsData Is Nothing) Then
            orderDetailsData = LoadOrderDetailsData()
        End If
        e.DataSources.Add(New ReportDataSource("DataSet1_OrderDetails", orderDetailsData))

    End Sub


    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        If (Not IsPostBack) Then

            ' Set RDL file.
            ReportViewer1.LocalReport.ReportPath = "c:\My Reports\Orders.rdlc"

            ' Supply a DataTable corresponding to each report data source.
            Dim myReportDataSource = New ReportDataSource("DataSet1_Orders", LoadOrdersData())
            ReportViewer1.LocalReport.DataSources.Add(myReportDataSource)
        End If

        'Add a handler for drillthrough.
        AddHandler ReportViewer1.LocalReport.SubreportProcessing, AddressOf DemoSubreportProcessingEventHandler

    End Sub

End Class

請參閱

參考

LocalReport 類別

Microsoft.Reporting.WebForms 命名空間