LocalReport.SubreportProcessing, événement
Se produit lors du traitement d'un sous-rapport.
Espace de noms : Microsoft.Reporting.WebForms
Assembly : Microsoft.ReportViewer.WebForms (dans Microsoft.ReportViewer.WebForms.dll)
Syntaxe
'Déclaration
Public Event SubreportProcessing As SubreportProcessingEventHandler
public event SubreportProcessingEventHandler SubreportProcessing
public:
event SubreportProcessingEventHandler^ SubreportProcessing {
void add (SubreportProcessingEventHandler^ value);
void remove (SubreportProcessingEventHandler^ value);
}
member SubreportProcessing : IEvent<SubreportProcessingEventHandler,
SubreportProcessingEventArgs>
JScript ne prend pas en charge les événements.
Notes
The SubreportProcessing event is triggered for every instance of the subreport in the main report, and not just for each subreport definition. If a report contains multiple subreports instances from the same report definition, this event is triggered for each instance.
You must supply data for any data sources used in subreports. To do this, you must supply an event handler for the SubreportProcessing event.
You can examine values of parameters passed to the subreport by examining the Parameters property and supplying data corresponding to those parameter values.
If the main report has several subreports, you can examine the ReportPath property of the SubreportProcessingEventArgs class to determine which subreport is being processed and supply data for that subreport.
Please see SubreportProcessingEventArgs for a description of the arguments passed to this event handler.
Exemples
The following code example implements a master/detail report using subreports. The code loads a sample report that contains a subreport and sets up an event handler to handle the SubreportProcessing event. The arguments passed to the SubreportProcessing event handler include an object encapsulating the subreport. The event handler adds a data source instance to this subreport before it is rendered in the ReportViewer control.
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