Question

如何通过打印机自动打印基于给定文件名的文本文件，无需在C sharp窗口服务中进行任何手动操作，这对我不起作用，任何人都给我建议。

using System.Management; 

    private Font printFont;
    private StreamReader streamToPrint;

 private void GetPrinters(string fileName)
    {

ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM  Win32_Printer");

        string printerName = "";
        foreach (ManagementObject printer in searcher.Get()) 
        {
        printerName = printer["Name"].ToString().ToLower();
        if (printerName.Equals(@"\\chenraqdc1.raqmiyat.local\hp laserjet black chennai"))
            {
              Console.WriteLine("Printer = " + printer["Name"]); 
                 if (printer["WorkOffline"].ToString().ToLower().Equals("true"))
                    {
                         // printer is offline by user
                        label1.Text = "Your Plug-N-Play printer is not connected.";
                    }
                 else
                    {streamToPrint = new StreamReader(fileName);

                    printFont = new Font("Arial", 10);
                    PrintDocument pd = new PrintDocument();
                    pd.PrintPage += new PrintPageEventHandler
                       (this.pd_PrintPage);
                    pd.Print();

                    streamToPrint.Close();
                    }
            }
        }
     }
            private void pd_PrintPage(object sender, PrintPageEventArgs ev)
        {
        float linesPerPage = 0;
        float yPos = 0;
        int count = 0;
        float leftMargin = ev.MarginBounds.Left;
        float topMargin = ev.MarginBounds.Top;
        string line = null;

        // Calculate the number of lines per page.
        linesPerPage = ev.MarginBounds.Height /
           printFont.GetHeight(ev.Graphics);

        // Print each line of the file.
        while (count < linesPerPage &&
           ((line = streamToPrint.ReadLine()) != null))
        {
            yPos = topMargin + (count *
               printFont.GetHeight(ev.Graphics));
            ev.Graphics.DrawString(line, printFont, Brushes.Black,
               leftMargin, yPos, new StringFormat());
            count++;
        }

Answer 1

你可以这样做......

注意：这是如何使用c＃窗口服务打印pdf文件的示例代码，如果要打印文本文件，可以更改此代码

带有按钮（cmdGetPrinters）和ListView的Windows窗体（lstPrinters）。列表视图定义了两列 - “属性”和 “值”将描述安装在本地的打印机机。以下代码实现了神奇。

using System;                                                              
using System.Collections.Generic;                                          
using System.ComponentModel;                                                
using System.Data; System.Drawing;                                         
using System.Text; System.Windows.Forms;                                   
using System.Management;                                                   
using System.Management.Instrumentation;                                    

public partial class frmPrintDisplay : Form                                 
{                                                                           
 public frmPrintDisplay()                                               
 {                                                                      
      InitializeComponent();                                            
 }                                                                      

 private void cmdGetPrinters_Click(object sender, EventArgs e)          
 {                                                                      
     ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_Printer");

     ManagementObjectSearcher mo = new ManagementObjectSearcher(query); 

     ManagementObjectCollection printers = mo.Get();                    

    foreach (ManagementObject printer in printers)                      
    {                                                                  
        PropertyDataCollection printerProperties = printer.Properties;  
        string printerPath = printer.Path.ToString() ;                  
        PropertyDataCollection.PropertyDataEnumerator test =            
            printer.Properties.GetEnumerator();                         

        while(! (test.MoveNext()== false ))                             
        {                                                               
            lstPrinters.Items.Add(                                      
                new ListViewItem( new string[]                          
                {                                                       
                    test.Current.Name,                                  
                    (                                                  
                        (test.Current.Value == null) ?                  
                        "n/a" : test.Current.Value.ToString()           
                    )                                                   
                })                                                      
            );                                                         
         }                                                               
      }                                                                   
    }                                                                       
  }

此图显示了这款小型Windows应用的结果。请注意“名称”属性，这将用于将文本文件发送到打印机。这显示在打印机的“ShareName”属性下。在同一域/工作组中的测试计算机上，您必须安装新的网络打印机，并指示安装以查看第一台计算机上的共享打印机。这实际上使第一台计算机成为打印机服务器，并且您可以关闭复制客户端的设置。

现在进入测试机器......上面提到的应用程序code building将文本文件保存到名为C：\ Program Files [Application Name] \ Temp \

的临时目录中

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



 private void print(ref DirectoryInfo tempDir)                               
 {                                                                          
   try                                                                    
   {                                                                       
    foreach(FileInfo file in tempDir.GetFiles("*.pdf"))                 
    {                                                                   
        file.CopyTo("\\\\XYZ\\Phaser77\\" + file.Name);                 
    }                                                                   
   }                                                                      
   catch(Exception ee){ }                                                  
 }

我希望它会帮助你

如何使用C＃窗口服务通过打印机打印数据打印文本文件

1 个答案: