在C＃中通过批处理文件运行exe时，为Null异常，但在手动单击批处理时则为空

Question

We have a 3rd party exe that was built for us. It reads word docs and turns them into XML so we can process them.

We have a batch file that runs fine when clicked. It just loops over all the docs in our doc folder and passes the parameters to the WordExtract.exe:

for %%a in (MyPATH\*.doc) do WordExtract.exe -InputFile="%%a" -TempFile0="%%a.html" -OutputFile= "%%a.xml"

When we try to call it in our C# code however, it gives us a null reference exception for the WordExtract.exe

System.NullReferenceException was unhandled
  Message=Object reference not set to an instance of an object.
  Source=WordExtract
  StackTrace:
       at WordExtract.Converter.word2text(FileInfo file, FileInfo txtfile)
       at WordExtract.Program.Main(String[] args)
  InnerException:

So it's calling the batchfile fine. I'm just not sure why the batchfile produces no errors when I run it manually, but somehow has a null exception when run Programatically.

I also had the same result when trying to just run the exe in command prompt manually and programatically. Works fine when done manually and gives the above error when run programatically.

Any ideas on this? Running the batch file should produce the same results either way. It doesn't take any inputs at all so I can't be screwing that up programatically.

Here's the code for running my batch file:

Process proc = new Process();
            string targetDir = string.Format(@"C:\BatchTest");//this is where batch.bat is
            proc.StartInfo.WorkingDirectory = targetDir;
            proc.StartInfo.FileName = "batch.bat";
            proc.StartInfo.CreateNoWindow = false;
            proc.Start();
            proc.WaitForExit();

Answer 1

您需要执行的文件是“ CMD.exe”，而要运行的批处理文件是您的参数：-

System.Diagnostics.Process.Start("cmd", "/c C:\\BatchTest\\batch.bat");