用热敏打印机实现打印餐厅消费清单，用的是USB接口，连接打印机出现问题,特来请教各位大神们，小弟感激不尽。我结帖率很高的的

[六儿丶]

/// <summary>
/// 打开一个vxd(设备)
/// </summary>
[DllImport("kernel32.dll", EntryPoint = "CreateFile", CharSet = CharSet.Auto)]
private static extern IntPtr CreateFile(string lpFileName, uint dwDesiredAccess, int dwShareMode, int lpSecurityAttributes,
int dwCreationDisposition, int dwFlagsAndAttributes, int hTemplateFile);


/// <summary>
/// 开始连接打印机
/// </summary>
private bool PrintOpen()
{
iHandle = CreateFile(prnPort, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);

if (iHandle.ToInt32() == -1)
{
MessageBox.Show("没有连接打印机或者打印机端口不是USB001！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return false;
}
else
{
fs = new FileStream(iHandle, FileAccess.ReadWrite);
sw = new StreamWriter(fs, System.Text.Encoding.Default); //写数据
return true;
}
}

[六儿丶]

上网研究了一下 iHandle = CreateFile(prnPort, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0); 这是连接并口的