Classe LocalReport

Articolo
08/22/2008

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

Spazio dei nomi: Microsoft.Reporting.WinForms
Assembly: Microsoft.ReportViewer.WinForms (in microsoft.reportviewer.winforms.dll)

Sintassi

Osservazioni

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 nonvisual 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.

Esempio

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

private void button1_Click(object sender, EventArgs e)
{

   Microsoft.Reporting.WinForms.LocalReport lr = new Microsoft.Reporting.WinForms.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();
      }
}

Private Sub Button1_Click(ByVal sender As System.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()

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

   bytes = ReportViewer1.LocalReport.Render("Excel", Nothing, _
     mimeType,encoding, extension, streamids, warnings)

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

   MessageBox.Show("Report exported to output.xls", "Info")
End Sub

Gerarchia di ereditarietà

System.Object
Microsoft.Reporting.WinForms.Report
Microsoft.Reporting.WinForms.LocalReport

Protezione dei thread

Tutti i membri statici pubblici (Shared in Visual Basic) di questo tipo sono affidabili. Non è invece garantita la sicurezza dei membri dell'istanza.

Vedere anche

Riferimento

Membri LocalReport
Spazio dei nomi Microsoft.Reporting.WinForms

Condividi tramite