通过ASP.NET基于DOS的打印

Question

我的情况是这样的：

我正在服务器上生成一个文本文件形式的报告，需要在点阵打印机上使用DOS模式进行打印。我想避免Windows打印，因为它太慢了。在ASP.NET中有没有一种方法可以进行基于DOS的打印，因为它最适合于点阵打印机。我已经搜索了网络，但没有找到任何解决方案或指示。有没有人有他们可能已经实现或偶然发现的任何指针/解决方案。

此应用程序是一个基于Web的应用程序。

谢谢。

Answer 1

如果我没理解错的话，一种选择是执行一个批处理文件，该文件将从ASP.NET执行实际的打印。

// Get the full file path
string strFilePath = “c:\\temp\\test.bat”;

// Create the ProcessInfo object
System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo("cmd.exe");
psi.UseShellExecute = false; 
psi.RedirectStandardOutput = true;
psi.RedirectStandardInput = true;
psi.RedirectStandardError = true;
psi.WorkingDirectory = “c:\\temp\\“;

// Start the process
System.Diagnostics.Process proc = System.Diagnostics.Process.Start(psi);


// Open the batch file for reading
System.IO.StreamReader strm = System.IO.File.OpenText(strFilePath); 

// Attach the output for reading
System.IO.StreamReader sOut = proc.StandardOutput;

// Attach the in for writing
System.IO.StreamWriter sIn = proc.StandardInput;


// Write each line of the batch file to standard input
while(strm.Peek() != -1)
{
  sIn.WriteLine(strm.ReadLine());
}

strm.Close();

// Exit CMD.EXE
string stEchoFmt = "# {0} run successfully. Exiting";

sIn.WriteLine(String.Format(stEchoFmt, strFilePath));
sIn.WriteLine("EXIT");

// Close the process
proc.Close();

// Read the sOut to a string.
string results = sOut.ReadToEnd().Trim();


// Close the io Streams;
sIn.Close(); 
sOut.Close();


// Write out the results.
string fmtStdOut = "<font face=courier size=0>{0}</font>";
this.Response.Write(String.Format(fmtStdOut,results.Replace(System.Environment.NewLine, "<br>")));

Answer 2

来自BobbyShaftoe的答案是正确的。这是它的一个书生气的版本：

public static void CreateProcess(string strFilePath)
{
    // Create the ProcessInfo object
    var psi = new ProcessStartInfo("cmd.exe")
                  {
                      UseShellExecute = false,
                      RedirectStandardOutput = true,
                      RedirectStandardInput = true,
                      RedirectStandardError = true,
                      WorkingDirectory = "c:\\temp\\"
                  };

    // Start the process
    using (var proc = Process.Start(psi))
    {
        // Attach the in for writing
        var sIn = proc.StandardInput;

        using (var strm = File.OpenText(strFilePath))
        {
            // Write each line of the batch file to standard input
            while (strm.Peek() != -1)
            {
                sIn.WriteLine(strm.ReadLine());
            }
        }

        // Exit CMD.EXE

        sIn.WriteLine(String.Format("# {0} run successfully. Exiting", strFilePath));
        sIn.WriteLine("EXIT");

        // Read the sOut to a string.
        var results = proc.StandardOutput.ReadToEnd().Trim();

        // Write out the results.
        string fmtStdOut = "<font face=courier size=0>{0}</font>";
        this.Response.Write(String.Format(fmtStdOut,results.Replace(System.Environment.NewLine, "<br>")));
    }
}