LocalReport 類別

Represents a report that is processed and rendered locally without connecting to a report server.

命名空間: Microsoft.Reporting.WebForms
組件: Microsoft.ReportViewer.WebForms (在 microsoft.reportviewer.webforms.dll)

語法

備註

The LocalReport class represents reports that are processed and rendered locally without connecting to a report server. This class is the same object that is used by the ReportViewer control, but it also can be used independently as a non-visual object that encapsulates the core functionality of the ReportViewer control.

The LocalReport object can open client report definition (RDLC) files from the file system, or the RDLC file can be supplied to it as a Stream or a TextReader.

The LocalReport object does not have the ability to execute queries or fetch data; instead data must be supplied to it as instances of ADO.NET DataTables or as a collection of business objects.

The LocalReport object supports report parameters, but does not support query parameters.

重要事項
In contrast to the Windows Forms version of the ReportViewer control, the WebForm version does not support changing the report definition after it has been rendered. To change the report definition, you will have to create a new instance of the ReportViewer control.

範例

In the following code example, a LocalReport object is used to load and export a report.

protected void Button1_Click(object sender, EventArgs e)
{

   Microsoft.Reporting.WebForms.LocalReport lr = 
     new Microsoft.Reporting.WebForms.LocalReport();

   string deviceInfo =
     "<DeviceInfo>" +
     "<SimplePageHeaders>True</SimplePageHeaders>" + 
     "</DeviceInfo>";

   lr.ReportPath = @"C:\My Reports\Monthly Sales.rdlc";

   lr.DataSources.Add(new ReportDataSource("Sales", GetSalesData()));

   byte[] bytes = lr.Render("Excel", deviceInfo, out mimeType, 
     out encoding, out streamids, out warnings);

      using (FileStream fs = new FileStream(@"c:\My Reports\Monthly Sales.xls", FileMode.Create))
      {
        fs.Write(bytes, 0, bytes.Length);
        fs.Close();
      }
}

Protected Sub Button1_Click(ByVal sender As Object, _
   ByVal e As System.EventArgs) Handles Button1.Click
   Dim warnings As Warning() = Nothing
   Dim streamids As String() = Nothing
   Dim mimeType As String = Nothing
   Dim encoding As String = Nothing
   Dim extension As String = Nothing
   Dim deviceInfo as string
   Dim bytes As Byte()

   Dim lr As New Microsoft.Reporting.WebForms.LocalReport

   lr.ReportPath = "C:\My Reports\Monthly Sales.rdlc"

   lr.DataSources.Add(New ReportDataSource("Sales", GetSalesData()))

   deviceInfo = _
"<DeviceInfo><SimplePageHeaders>True</SimplePageHeaders></DeviceInfo>"

   bytes = ReportViewer1.LocalReport.Render("Excel", deviceInfo,_
      mimeType, encoding, extension, streamids, warnings)

   Dim fs As New FileStream("c:\output.xls", FileMode.Create)
   fs.Write(bytes, 0, bytes.Length)
   fs.Close()

End Sub

繼承階層

System.Object
   Microsoft.Reporting.WebForms.Report
    Microsoft.Reporting.WebForms.LocalReport

執行緒安全性

任何公用靜態 (共用 在 Visual Basic) 此型別的成員具備執行緒安全。不保證任何執行個體成員安全執行緒。

另請參閱

參考

LocalReport 成員
Microsoft.Reporting.WebForms 命名空間