Solved

System.Diagnostics.ProcessStartInfo with string arguments

Posted on 2012-03-12
15
615 Views
Last Modified: 2012-03-12
I've to pass to  a cmd file 2 arguments: the first is a number and the second is a description string containing spaces.
My code looks like this ...
Dim psi As System.Diagnostics.ProcessStartInfo = New System.Diagnostics.ProcessStartInfo
        psi.FileName = "C:\Test.cmd"
        psi.Arguments = Par_Arguments
        psi.WindowStyle = ProcessWindowStyle.Normal
        System.Diagnostics.Process.Start(psi)

Par_Arguments is the variable that contain the 2 arguments.
My trouble is what I have to do to build the second string argument with spaces.
0
Comment
Question by:fantamen
  • 7
  • 4
  • 3
  • +1
15 Comments
 
LVL 4

Expert Comment

by:petr_hlucin
ID: 37710166
Since you don't have specified the value of Par_Arguments value I think it is something like this:
Par_Arguments = "5     "

Use the following instead:
Par_Arguments = "5 \"     \""
0
 

Expert Comment

by:Stuporman
ID: 37710173
What does the assignment statement of Par_Arguments look like?
0
 

Author Comment

by:fantamen
ID: 37710416
The value of Par_Arguments can be for example "2 Messaggio di prova" where the first parameter is "2" and the second "Messaggio di prova".
0
Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 

Expert Comment

by:Stuporman
ID: 37710457
In that case, petr_hlucin's answer is what you need. it would look like this:

Par_Arguments = "2 \"Messaggio di prova\""

The reason you need this is that Windows splits your argument string by spaces, so your raw text gets passed as 4 different arguments instead of two. That means you need to surround the second argument with quotes, and the only way to do that in VB is to use the escape sequence for quotes, which is \".

Buona Fortuna, mi amici.
0
 

Author Comment

by:fantamen
ID: 37710477
If I write
Par_Arguments = "2 \"Messaggio di prova\""
the compiler returns end of statements expected...
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 37710492
vb escape char is not \, it is "

try this:

Par_Arguments = "2 ""Messaggio di prova"""
0
 

Expert Comment

by:Stuporman
ID: 37710507
I'm sorry, I was confused with C#. To escape quotes in VB, use two in a row like this:

Par_Arguments = "2 ""Messaggio di prova"""
0
 

Author Comment

by:fantamen
ID: 37710907
Now code is compiled correct but I'm investigating for a bad response from .cmd file.
It run correctly only if second parameter don't contain spaces.
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 37710929
I think I already had this problem. try doubling them once more:


        Par_Arguments = "2 """"Messaggio di prova"""""
0
 

Author Comment

by:fantamen
ID: 37710945
Using your assignment the second parameter is evalueted partially, only until "Messaggio" and the substring " di prova" is discarded.
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 37710963
can you try:


        Par_Arguments = "2 " + Chr(34) + "Messaggio di prova" + Chr(34)
0
 

Author Comment

by:fantamen
ID: 37711051
I've tried before opening the thread in expert exchange but 2 parameter was discarded e not recognized.
0
 

Author Comment

by:fantamen
ID: 37711547
Good. Now probably I've found the reason: in batch file there is this line:
if "x%1"=="x" goto Missing_Severity

I've replaced with

if [%1]==[] goto Missing_Severity

... and now all works correctly.

Can you confirm my change is correct?


Thanks
0
 
LVL 70

Accepted Solution

by:
Éric Moreau earned 500 total points
ID: 37711745
Sincerely, i can't really but since you tested it and it is working properly, you should consider it as good.
0
 

Author Closing Comment

by:fantamen
ID: 37711881
To solve was necessary not only batch modifcations but your indications too. So thank you very match!.
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
VB.NET 2008 Publish Error 2 34
Visual Studios 1 76
Help with opening combobox using VB.NET. 3 25
How to share My.Settings in multiple application instances ? 7 25
Article by: jpaulino
XML Literals are a great way to handle XML files and the community doesn’t use it as much as it should.  An XML Literal is like a String (http://msdn.microsoft.com/en-us/library/system.string.aspx) Literal, only instead of starting and ending with w…
It’s quite interesting for me as I worked with Excel using vb.net for some time. Here are some topics which I know want to share with others whom this might help. First of all if you are working with Excel then you need to Download the Following …
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

856 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