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            How can I run another application or batch file from my Visual C# .NET code?

            Published 01 June 04 11:54 PM

            Posted by: Duncan Mackenzie, MSDN
            This post applies to Visual C# .NET 2002/2003

            Suppose you want to run a command line application, open up another Windows program, or even bring up the default web browser or email program... how can you do this from your C# code?

            The answer for all of these examples is the same, you can use the classes and methods in System.Diagnostics.Process to accomplish these tasks and more.

            Example 1. Running a command line application, without concern for the results:

            private void simpleRun_Click(object sender, System.EventArgs e){
             System.Diagnostics.Process.Start(@"C:\listfiles.bat");
            }

            Example 2. Retrieving the results and waiting until the process stops (running the process synchronously):

            private void runSyncAndGetResults_Click(object sender, System.EventArgs e){
             System.Diagnostics.ProcessStartInfo psi =
              
            new System.Diagnostics.ProcessStartInfo(@"C:\listfiles.bat");
             psi.RedirectStandardOutput =
            true;
             psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
             psi.UseShellExecute =
            false;
             System.Diagnostics.Process listFiles;
             listFiles = System.Diagnostics.Process.Start(psi);
             System.IO.StreamReader myOutput = listFiles.StandardOutput;
             listFiles.WaitForExit(2000);
             
            if (listFiles.HasExited)
             {
              
            string output = myOutput.ReadToEnd();
              
            this.processResults.Text = output;
             }
            }

             Example 3. Displaying a URL using the default browser on the user's machine:

            private void launchURL_Click(object sender, System.EventArgs e){
             
            string targetURL = @http://www.duncanmackenzie.net;
             System.Diagnostics.Process.Start(targetURL);
            }

            In my opinion, you are much better off following the third example for URLs, as opposed to executing IE with the URL as an argument. The code shown for Example 3 will launch the user's default browser, which may or may not be IE; you are more likely to provide the user with the experience they want and you will be taking advantage of the browser that is most likely to have up-to-date connection information.

            C# code download available from http://www.duncanmackenzie.net/Samples/default.aspx

            By the way, this post is a simple port of an earlier VB FAQ post... just in case you thought you had seen it already in your feeds...

            Posted on 2009-11-17 13:10 micheal's tech 閱讀(306) 評論(0)  編輯 收藏 引用
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