C# PrintPageEventArgs.HasMorePages属性代码示例

// Specifies what happens when the user clicks the Button.
 private void printButton_Click(object sender, EventArgs e) 
 {
   try 
   {
     // Assumes the default printer.
     pd.Print();
   }  
   catch(Exception ex) 
   {
     MessageBox.Show("An error occurred while printing", ex.ToString());
   }
 }
 
 // Specifies what happens when the PrintPage event is raised.
 private void pd_PrintPage(object sender, PrintPageEventArgs ev) 
 {      
   // Draw a picture.
   ev.Graphics.DrawImage(Image.FromFile("C:\\My Folder\\MyFile.bmp"), ev.Graphics.VisibleClipBounds);
      
   // Indicate that this is the last page to print.
   ev.HasMorePages = false;
 }

//引入命名空间
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class Form1 : System.Windows.Forms.Form {
    private System.Windows.Forms.RichTextBox richTextBox1;
    private System.Windows.Forms.Button button1;
    private System.Windows.Forms.Button button2;
    private System.ComponentModel.Container components = null;
    private System.Windows.Forms.PrintDialog printDialog1;
    private System.Drawing.Printing.PrintDocument ThePrintDocument = null;
    private System.IO.StringReader myStringReader = null;

    public Form1() {
        ThePrintDocument = new System.Drawing.Printing.PrintDocument();
        this.richTextBox1 = new System.Windows.Forms.RichTextBox();
        this.button1 = new System.Windows.Forms.Button();
        this.button2 = new System.Windows.Forms.Button();
        this.printDialog1 = new System.Windows.Forms.PrintDialog();
        this.SuspendLayout();
        this.richTextBox1.Location = new System.Drawing.Point(72, 16);
        this.richTextBox1.Size = new System.Drawing.Size(344, 320);
        this.richTextBox1.Text = "richTextBox1";
        this.button1.Location = new System.Drawing.Point(128, 352);
        this.button1.Text = "&Print";
        this.button1.Click += new System.EventHandler(this.button1_Click);
        this.button2.Location = new System.Drawing.Point(280, 352);
        this.button2.Text = "&Close";
        this.button2.Click += new System.EventHandler(this.button2_Click);
        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(488, 381);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {
        this.button2,
        this.button1,
        this.richTextBox1});
        this.ResumeLayout(false);
    }

    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }

    private void button2_Click(object sender, System.EventArgs e) {
        Close();
    }

    private void button1_Click(object sender, System.EventArgs e) {
        ThePrintDocument.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(PrintPage);
        printDialog1.Document = ThePrintDocument;
        string strText = this.richTextBox1.Text;
        myStringReader = new System.IO.StringReader(strText);
        if (printDialog1.ShowDialog() == DialogResult.OK) {
            this.ThePrintDocument.Print();
        }
    }
    protected void PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs ev) {
        float linesPerPage = 0;
        float yPosition = 0;
        int count = 0;
        float leftMargin = ev.MarginBounds.Left;
        float topMargin = ev.MarginBounds.Top;
        string line = null;
        Font printFont = this.richTextBox1.Font;
        SolidBrush myBrush = new SolidBrush(Color.Black);
        linesPerPage = ev.MarginBounds.Height / printFont.GetHeight(ev.Graphics);
        while (count < linesPerPage && ((line = myStringReader.ReadLine()) != null)) {
            yPosition = topMargin + (count * printFont.GetHeight(ev.Graphics));
            ev.Graphics.DrawString(line, printFont, myBrush, leftMargin,yPosition, new StringFormat());
            count++;
        }
        if (line != null)
            ev.HasMorePages = true;
        else
            ev.HasMorePages = false;

        myBrush.Dispose();
    }

}