Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

open command prompt and run command in vb

Posted on 2014-10-10
4
136 Views
Last Modified: 2015-01-18
Hello,

i am trying to simply open a command prompt and run a command but its not running just flashing a command prompt can someone help


       Dim p As New Process()
        p.StartInfo.StandardOutputEncoding = System.Text.Encoding.ASCII
        p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
        p.StartInfo.RedirectStandardOutput = True
        p.StartInfo.UseShellExecute = False
        p.StartInfo.FileName = "cmd.exe"
        p.StartInfo.WorkingDirectory = "c:\Windows\Microsoft.NET\Framework\v4.0.30319\"
        p.StartInfo.Arguments = "aspnet_regiis -pef" & "connectionStrings" & Path & cmbApps.Text
        Try
            p.Start()
            Dim output As String = p.StandardOutput.Read()
            lstdata.Items.Add(output)
            p.WaitForExit()
        Catch ex As Exception
            MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
        Finally

            If Not (p Is Nothing) Then
                p.Dispose()
            End If

        End Try

Open in new window

0
Comment
Question by:Chris Jones
  • 3
4 Comments
 
LVL 22

Expert Comment

by:rspahitz
ID: 40373718
When using the old Shell command, you would do something like this:

"cmd /c DOSCmd"
to run the command and close the window
or
"cmd /k DOSCmd"
to run the command and keep the window open.

Does that work here?

p.StartInfo.FileName = "cmd.exe /k"

--
Most likely, there's a DOS syntax error so keeping the window open will probably help you identify what's wrong.

My guess would be that you need a space after (and maybe before) "connectionStrings" -> "connectionStrings "
0
 
LVL 22

Expert Comment

by:rspahitz
ID: 40373729
Another way to help is to first convert this into a value:

"aspnet_regiis -pef" & "connectionStrings" & Path & cmbApps.Text

Then open a cmd window from the start button and enter:
cmd /k aspnet_regiis -pefconnectionStrings {Path} {cmbApps.Text}

Open in new window


Where the last two parts are the values.  You should see the error in the command window
0
 
LVL 1

Author Comment

by:Chris Jones
ID: 40373772
Hello rspahitz

this did work when i ran from the start menu and command prompt without the /k

but the above did not work

"cmd /c DOSCmd" 
to run the command and close the window
or
"cmd /k DOSCmd"
to run the command and keep the window open.

Does that work here?

p.StartInfo.FileName = "cmd.exe /k"

Open in new window

0
 
LVL 22

Accepted Solution

by:
rspahitz earned 500 total points
ID: 40373937
I've never done it the way you're doing it, but that's probably the "new way".
For now you can see if this works:

Shell "cmd /k aspnet_regiis -pef" & "connectionStrings" & Path & cmbApps.Text

If so, you may see the error message then you can go back to your code so you can capture the process info.

Otherwise, see if you can locate a method to KeepWindowOpen or possibly this:

p.StartInfo.Arguments = "aspnet_regiis -pef" & "connectionStrings" & Path & cmbApps.Text & " > C:\errorfile.txt"

After the window flashes (runs the command and closes the window!) then you should have a file called errorfile.txt located on the root of your C-drive which might clue you in on the problem.
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
Parsing a CSV file is a task that we are confronted with regularly, and although there are a vast number of means to do this, as a newbie, the field can be confusing and the tools can seem complex. A simple solution to parsing a customized CSV fi…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

839 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question