Question

如果这是一个愚蠢的错误，请原谅我。我几乎没有使用CMD的经验，也没有从C＃程序中执行cmd的经验。我想用我的C＃代码以编程方式执行FTP命令，将文件打印到PDF。我遇到的问题是，当被要求登录AS400时，我认为我的程序在发送下一行（即USERNAME）之前没有等待足够长的时间来建立连接。所以下一行无法登录。

如果我在cmd中逐行执行此操作，它就可以正常工作。

以下是我所拥有的：

这是我到目的地文件夹的目录：

string StatementString = "\\Varying Directories To User Folder\\Directory with spaces\\Destination";

string ToUserDirectory = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
            string StatementPath = ToUserDirectory + StatementString;

StringBuilder shortPath = new StringBuilder(255);

GetShortPathName(StatementPath, shortPath, shortPath.Capacity);   

Process CMDScript = new Process();
var processInfo = new System.Diagnostics.ProcessStartInfo();
processInfo.FileName = "cmd.exe";
processInfo.RedirectStandardInput = true;
processInfo.CreateNoWindow = true;
processInfo.UseShellExecute = false;
processInfo.RedirectStandardError = true;
processInfo.RedirectStandardOutput = true;

CMDScript.StartInfo = processInfo;
CMDScript.Start();

using (StreamWriter sw = CMDScript.StandardInput)
{
    if (sw.BaseStream.CanWrite)
    {
        //"cd \PathDirectory\ [- C:]
        sw.WriteLine("cd" + shortPath.ToString().Substring(2));

        //Delete Old Files
        sw.WriteLine("del /Q *");

        //Connects to my AS400 using its IP Address (Using Zeroes for this question)
        sw.WriteLine("ftp 000.000.00.00");
        sw.WriteLine("USERNAME");
        sw.WriteLine("PASSWORD");

         //Directory of stuff I want from AS400
         sw.WriteLine("cd /home/reallycoolplacewithstuffIneed");

         //Back to my Directory on my PC
         sw.WriteLine("lcd" + shortPath.ToString().Substring(2));

         //Get the stuff I need
         sw.WriteLine("get statements.csv");

         //Exit the command prompt
         sw.WriteLine("bye");
     }
 }



 CMDScript.OutputDataReceived += (object sender, System.Diagnostics.DataReceivedEventArgs e) =>
     Console.WriteLine("output>>" + e.Data);
 CMDScript.BeginOutputReadLine();

 CMDScript.ErrorDataReceived += (object sender, System.Diagnostics.DataReceivedEventArgs e) =>
     Console.WriteLine("error>>" + e.Data);
 CMDScript.BeginErrorReadLine();

 CMDScript.WaitForExit();

 Console.WriteLine("ExitCode: {0}", CMDScript.ExitCode);
 CMDScript.Close();

我希望这个问题足够明确。我只需要一种安全的登录AS400的方法，这样我就可以使用FTP了。我不确定在建立连接时是否需要一些Wait（1）方法来暂停我的程序，或者用户和密码的处理方式是否不同。到目前为止，其他一切似乎都运转得很好，而不是连接。

Answer 1

在https://technet.microsoft.com/en-us/sysinternals/ms229711(v=vs.90)查看Technet文章“如何：使用FTP下载文件”，它包含一个C＃代码段。

我尝试将其编辑为您在示例中提供的信息。

using System; 
using System.IO; 
using System.Net; 
using System.Text; 

namespace Examples.System.Net 
{ 
    public class WebRequestGetExample 
    { 
        public static void Main () 
        { 
            // Get the object used to communicate with the server. 
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://000.000.000.000/home/reallycoolplacewithstuffIneed"); 
            request.Method = WebRequestMethods.Ftp.DownloadFile; 

            // Trying to use your credentials 
            request.Credentials = new NetworkCredential("USERNAME","PASSWORD"); 

            FtpWebResponse response = (FtpWebResponse)request.GetResponse(); 

            Stream responseStream = response.GetResponseStream(); 
            StreamReader reader = new StreamReader(responseStream); 
            Console.WriteLine(reader.ReadToEnd()); 

            Console.WriteLine("Download Complete, status {0}", response.StatusDescription); 

            reader.Close(); 
            response.Close();   
        } 
    } 
}

希望有所帮助。

小心

安德烈亚斯

从C＃建立到AS400的FTP连接：从CMD工作但不在代码中工作

1 个答案: