HOW TO：在 Windows Form 中選擇附加至使用者電腦的印表機

更新：2007 年 11 月

使用者通常會想要選用預設印表機以外的印表機來進行列印工作。經由使用 PrintDialog 元件，您可以讓使用者從目前安裝的印表機中選擇他要的印表機。透過 PrintDialog 元件，PrintDialog 元件的 DialogResult 會被擷取並用來選取印表機。

在下列程序中，已經選取了要列印至預設印表機的文字檔案，接著 PrintDialog 類別會具現化。

若要選取印表機然後列印檔案

• 請用 PrintDialog 元件來選取要使用的印表機。

  在下列程式碼範例中，正在處理的有兩個事件。第一個是 Button 控制項的 Click 事件，PrintDialog 類別會具現化，而 DialogResult 屬性中則會擷取使用者所選取的印表機。

  第二個事件是 PrintDocument 元件的 PrintPage 事件，用來將範例文件列印至所指定的印表機。

  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++) 將下列程式碼加入表單的建構函式以註冊事件處理常式。

  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);
  

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