XtraReports > 示例 > 如何： 把报表文档保存到文件中，并从中恢复

这个示例展示了如何通过 PrintingSystemBase.SaveDocument 方法把报表文档保存到文件，然后如何通过 PrintingSystemBase.LoadDocument 方法加载报表文档。 要查看总说明，请参阅 存储文档。

为了使此示例能正确工作，需执行下列操作。

  1. 启动 MS Visual Studio (2005、2008 或 2010)，并且新建一个或者打开一个现有的 Windows 窗体应用程序。

  2. 添加新报表 (命名为 XtraReport1) 到应用程序中。

  3. 把两个按钮拖放到 Form1 (命名为 Button1 和 Button2)，并以下列方式接管它们的 Click 事件。

C#CopyCode image复制代码
using System;
using System.Windows.Forms;
using DevExpress.XtraPrinting;
using DevExpress.XtraPrinting.Preview;
// ...

// A temporary path to save a report to.
string filePath = @"C:\Temp\XtraReport1.prnx";

private void button1_Click(object sender, EventArgs e) {
    // Create a report.
    XtraReport1 report = new XtraReport1();

    // Generate a report document.
    report.CreateDocument();

    // Save a report document to a file.
    report.PrintingSystem.SaveDocument(filePath);
}

private void button2_Click(object sender, EventArgs e) {
    // Create a PrintingSystem instance.
    PrintingSystem ps = new PrintingSystem();

    // Load the document from a file.
    ps.LoadDocument(filePath);

    // Create an instance of the preview dialog.
    PrintPreviewFormEx preview = new PrintPreviewFormEx();

    // Load the report document into it.
    preview.PrintingSystem = ps;

    // Show the preview dialog.
    preview.ShowDialog();
}
Visual BasicCopyCode image复制代码
Imports System
Imports System.Windows.Forms
Imports DevExpress.XtraPrinting
Imports DevExpress.XtraPrinting.Preview
' ...

' A temporary path to save a report to.
Private filePath As String = "C:\Temp\XtraReport1.prnx"

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) _
Handles button1.Click
    ' Create a report.
    Dim report As New XtraReport1()

    ' Generate a report document.
    report.CreateDocument()

    ' Save a report document to a file.
    report.PrintingSystem.SaveDocument(filePath)
End Sub

Private Sub button2_Click(ByVal sender As Object, ByVal e As EventArgs) _
Handles button2.Click
    ' Create a PrintingSystem instance.
    Dim ps As New PrintingSystem()

    ' Load the document from a file.
    ps.LoadDocument(filePath)

    ' Create an instance of the preview dialog.
    Dim preview As New PrintPreviewFormEx()

    ' Load the report document into it.
    preview.PrintingSystem = ps

    ' Show the preview dialog.
    preview.ShowDialog()
End Sub

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