如何：在 Windows 窗体中选择连接到用户计算机的打印机

更新：2007 年 11 月

用户经常要选择使用默认打印机外的其他打印机进行打印。您可以使用户从当前使用 PrintDialog 组件安装的打印机中选择一台打印机。通过 PrintDialog 组件，可以捕获并使用 PrintDialog 组件的 DialogResult 来选择打印机。

在下面的过程中，选择将文本文件打印到默认打印机。然后实例化 PrintDialog 类。

选择打印机然后打印文件

• 使用 PrintDialog 组件选择要使用的打印机。

  在下面的代码示例中，有两个要处理的事件。第一个事件是 Button 控件的 Click 事件，在该事件中，PrintDialog 类被实例化，并且用户选择的打印机在 DialogResult 属性中捕获。

  第二个事件是 PrintDocument 组件的 PrintPage 事件，在该事件中，将一个示例文档打印到指定的打印机。

  Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
     Dim PrintDialog1 As New PrintDialog()
     PrintDialog1.Document = PrintDocument1
     Dim result As DialogResult = PrintDialog1.ShowDialog()
  
     If (result = DialogResult.OK) Then
       PrintDocument1.Print()
     End If 
  
  End Sub
  
  Private Sub PrintDocument1_PrintPage(ByVal sender As Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage
     e.Graphics.FillRectangle(Brushes.Red, New Rectangle(500, 500, 500, 500))        
  End Sub
  

  private void button1_Click(object sender, System.EventArgs e)
  {
     PrintDialog printDialog1 = new PrintDialog();
     printDialog1.Document = printDocument1;
     DialogResult result = printDialog1.ShowDialog();
     if (result == DialogResult.OK)
     {
        printDocument1.Print();
     }
  }
  
  private void printDocument1_PrintPage(object sender, 
  System.Drawing.Printing.PrintPageEventArgs e)
  {
     e.Graphics.FillRectangle(Brushes.Red, 
       new Rectangle(500, 500, 500, 500));
  }
  

  private void button1_Click(Object sender, System.EventArgs e)
  {
     PrintDialog printDialog1 = new PrintDialog();
     printDialog1.set_Document(printDocument1);
     DialogResult result = printDialog1.ShowDialog();
     if (result == DialogResult.OK)
     {
        printDocument1.Print();
     }
  }
  
  private void printDocument1_PrintPage(Object sender,
  System.Drawing.Printing.PrintPageEventArgs e)
  {
     e.get_Graphics().FillRectangle(Brushes.get_Red(),
        new Rectangle(500, 500, 500, 500));
  }
  

  private:
     void button1_Click(System::Object ^ sender,
        System::EventArgs ^ e)
     {
        PrintDialog ^ printDialog1 = gcnew PrintDialog();
        printDialog1->Document = printDocument1;
        System::Windows::Forms::DialogResult result = 
           printDialog1->ShowDialog();
        if (result == DialogResult::OK)
        {
           printDocument1->Print();
        }
     }
  private:
     void printDocument1_PrintPage(System::Object ^ sender,
        System::Drawing::Printing::PrintPageEventArgs ^ e)
     {
        e->Graphics->FillRectangle(Brushes::Red,
           Rectangle(500, 500, 500, 500));
     }
  

  (（Visual C#、Visual J# 和 Visual C++）在窗体的构造函数中放入以下代码以注册事件处理程序。

  this.printDocument1.PrintPage += new
     System.Drawing.Printing.PrintPageEventHandler
     (this.printDocument1_PrintPage);
  this.button1.Click += new System.EventHandler(this.button1_Click);
  

  this.printDocument1.add_PrintPage(new
  System.Drawing.Printing.PrintPageEventHandler
  (this.printDocument1_PrintPage));
  this.button1.add_Click(new System.EventHandler(this.button1_Click));
  

  this->printDocument1->PrintPage += gcnew
     System::Drawing::Printing::PrintPageEventHandler
     (this, &Form1::printDocument1_PrintPage);
  this->button1->Click += gcnew
     System::EventHandler(this, &Form1::button1_Click);
  

请参见

其他资源

Windows 窗体打印支持