如何在远程计算机上执行命令并使用c＃.net获取输出

Question

I am using WMI classes for executing command in remote machine and writing output in a file. I kept sleep for 5 sec if the process is completes with the 5 sec iam able to get the output from the file. But if the process is taking more time to finish iam not getting any out put.

Can any one suggest me how to wait till the remote process is completes or any other mechanism to get the output from from remote machine.

Following is my code

 ConnectionOptions connOptions = new ConnectionOptions();
            ObjectGetOptions objectGetOptions = new ObjectGetOptions();
            ManagementPath managementPath = new ManagementPath("Win32_Process");
            connOptions.Impersonation = ImpersonationLevel.Impersonate;
            connOptions.EnablePrivileges = true;
    ManagementScope manScope = new ManagementScope(String.Format(@"\\{0}\ROOT\CIMV2", computerName), connOptions);
                        manScope.Connect();
                        // Method Options
                        InvokeMethodOptions methodOptions = new InvokeMethodOptions(null, System.TimeSpan.MaxValue);
                        ManagementClass processClass = new ManagementClass(manScope, managementPath, objectGetOptions);
                        ManagementBaseObject inParams = processClass.GetMethodParameters("Create");
                        // Console.WriteLine(command);
                        inParams["CommandLine"] = "cmd /c " + command + " > c:\\tmp_dr.dat";
                        ManagementBaseObject outParams = processClass.InvokeMethod("Create", inParams,methodOptions);

                        Thread.Sleep(5000);

                        // then reading the file.

                        StreamReader sr = new StreamReader("\\\\" + computerName + "\\c$\\tmp_dr.dat");
                        line = sr.ReadLine();
                        while (line != null)
                        {enter code here
                            result += line + "\n";
                            line = sr.ReadLine();
                        }



                        sr.Close();

Answer 1

Below is one of the way you can wait on the remote process to complete it task

uint ProcessId = (uint)outParams["processId"];
    if (ProcessId != 0)
    {
        while (true)
        {
            try
            {
                Process.GetProcessById((int)ProcessId, {your_remoteMachineName});
                Thread.Sleep(1000);
            }
            catch
            {
                break;                    
            }
        }
    }

Answer 2

You could create a WCF service that creates the output to a given file, then returns an object instance that contains information eg number of pages in the file (the page size will depend on what you set your buffer size to in the WCF service).

eg create an operation contract Public Function execCommand(Byval commandName as String, Byval outputFile as String) as OutputInfo

Then create a second method that can retrieve the information page by page (possibly returning false when there are no more pages to retrieve or the page is out of range)

Public Function getOutput(ByVal fileName as String, ByVal pageNo as Integer) as OutputPage