C#控制字符式打印机

来源：互联网发布：如何整合优化资源编辑：程序博客网时间：2024/04/28 20:41

using System.IO;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;

[DllImport("Kernel32.dll")]
static extern IntPtr CreateFile(
    string filename,
    [MarshalAs(UnmanagedType.U4)]FileAccess fileaccess,
    [MarshalAs(UnmanagedType.U4)]FileShare fileshare,
    int securityattributes,
    [MarshalAs(UnmanagedType.U4)]FileMode creationdisposition,
    int flags,
    IntPtr template);

[DllImport("kernel32.dll")]
static extern bool CloseHandle(IntPtr hObject);

private void button1_Click(object sender, EventArgs e)
{
    SafeFileHandle sfh = null;
    IntPtr ptr = CreateFile("PRN", FileAccess.Write, FileShare.Write, 0, FileMode.Open, 0, IntPtr.Zero);
    sfh = new SafeFileHandle(ptr, true);
    StreamWriter sw = new StreamWriter(new FileStream(sfh, FileAccess.Write));
    sw.WriteLine("发送打印机控制命令");
    sw.Close();
    CloseHandle(ptr);
}