我如何看到使用打印預覽文件中提供的文本

Question

我正在開發一個應用程序print preview用戶喜歡打印的文件，我寫了下面的代碼，但我無法看到預覽頁面上的文本或內容原因是什麼，任何一個可以幫助我

我的代碼如下

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Text; 
using System.Windows.Forms; 
using System.Drawing.Printing; 
using System.IO; 

namespace WindowsApplication2 
{ 
    public partial class Form1 : Form 
    { 
    private PrintPreviewDialog printPreviewDialog1 = new PrintPreviewDialog(); 
    private PrintDocument printDocument1 = new PrintDocument(); 

    // Declare a string to hold the entire document contents. 
    private string documentContents; 

    // Declare a variable to hold the portion of the document that 
    // is not printed. 
    private string stringToPrint; 


    public Form1() 
    { 
     InitializeComponent(); 
    } 

    private void Form1_Load(object sender, EventArgs e) 
    { 

    } 

    private void ReadDocument() 
    { 

     string docName = "ACH.txt"; 
     string docPath = @"c:\"; 
     printDocument1.DocumentName = docName; 
     using (FileStream stream = new FileStream(docPath + docName, FileMode.Open)) 
     using (StreamReader reader = new StreamReader(stream)) 
     { 
      documentContents = reader.ReadToEnd(); 
     } 
     stringToPrint = documentContents; 
    } 

    private void printToolStripMenuItem_Click(object sender, EventArgs e) 
    { 
     ReadDocument(); 
     printPreviewDialog1.Document = printDocument1; 
     printPreviewDialog1.ShowDialog(); 
    } 
    void printDocument1_PrintPage(object sender, PrintPageEventArgs e) 
    { 
     int charactersOnPage = 5; 
     int linesPerPage = 10; 

     // Sets the value of charactersOnPage to the number of characters 
     // of stringToPrint that will fit within the bounds of the page. 
     e.Graphics.MeasureString(stringToPrint, this.Font, 
      e.MarginBounds.Size, StringFormat.GenericTypographic, 
      out charactersOnPage, out linesPerPage); 

     // Draws the string within the bounds of the page. 
     e.Graphics.DrawString(stringToPrint, this.Font, Brushes.Black, 
     e.MarginBounds, StringFormat.GenericTypographic); 

     // Remove the portion of the string that has been printed. 
     stringToPrint = stringToPrint.Substring(charactersOnPage); 

     // Check to see if more pages are to be printed. 
     e.HasMorePages = (stringToPrint.Length > 0); 

     // If there are no more pages, reset the string to be printed. 
     if (!e.HasMorePages) 
      stringToPrint = documentContents; 
    } 
} 

}

Answer 1

您還沒有迷上了您的打印活動。將此添加到您的表單構造函數中：

public Form1() 
{ 
    InitializeComponent(); 
    printDocument1.PrintPage += new PrintPageEventHandler(this.printDocument1_PrintPage); 
}