Read Command Line Output

[Steve]

How can I read the output from a command line utility such as ping,
nslookup, etc, from within my app??? I know that it is possible to
output the results to a text file using the > function in a command
window and then read the file, but doing this for 1000+ files will
cause a lot of unnecessary read/writes to the disc and affect
performance...

I am not asking for a .NET way to ping or do a DNS lookup, I am
interested in the concept of reading the output from a command line
utility...

Thanks

[Tom Shelton]

Re: Read Command Line Output

In article <7a0a0475.04052 50703.47fae444@ posting.google. com>, Steve wrote:[color=blue]
> How can I read the output from a command line utility such as ping,
> nslookup, etc, from within my app??? I know that it is possible to
> output the results to a text file using the > function in a command
> window and then read the file, but doing this for 1000+ files will
> cause a lot of unnecessary read/writes to the disc and affect
> performance...
>
> I am not asking for a .NET way to ping or do a DNS lookup, I am
> interested in the concept of reading the output from a command line
> utility...
>
> Thanks[/color]

You use System.Diagnost ics.Process to start the application, and then
you redirect it's standard output by making sure the startinfo objects'
useshellexecute is set to false and the redirectstandar doutput is set to
true. Then you can use the processes StandardOutput property to read
the text....

--
Tom Shelton [MVP]

[Cor Ligthert]

Re: Read Command Line Output

Hi Steve,

Roughly copied from a program and changed

I hope this helps?

Cor


\\\
Dim p As New Process
p.StartInfo.Use ShellExecute = False
p.StartInfo.Red irectStandardOu tput = True
p.StartInfo.Arg uments = myargumentstrin g
p.StartInfo.Wor kingDirectory = myworkdirectory string
p.StartInfo.Fil eName =C:\myprogram
p.Start()
Dim sr As IO.StreamReader = p.StandardOutpu t
Dim sb As New System.Text.Str ingBuilder("")
Dim input As Integer = sr.Read
Do Until input = -1
sb.Append(ChrW( input))
input = sr.Read
Loop
///

[Herfried K. Wagner [MVP]]

Re: Read Command Line Output

* google@valleybo y.net (Steve) scripsit:[color=blue]
> How can I read the output from a command line utility such as ping,
> nslookup, etc, from within my app??? I know that it is possible to
> output the results to a text file using the > function in a command
> window and then read the file, but doing this for 1000+ files will
> cause a lot of unnecessary read/writes to the disc and affect
> performance...[/color]

<URL:http://dotnet.mvps.org/dotnet/samples/miscsamples/downloads/RedirectConsole .zip>

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

[Steve]

Re: Read Command Line Output

Perfect, thanks... I have created a function if anyone is interested
(watch for line breaks)...

Friend Function ReadCmdOutput(B yVal applicationName As String,
Optional ByVal applicationArgs As String = "", Optional ByVal
workingDirector y As String = "", Optional ByVal showWindow As Boolean
= False) As String
Try
Dim processObj As New Process

processObj.Star tInfo.UseShellE xecute = False
processObj.Star tInfo.RedirectS tandardOutput = True
processObj.Star tInfo.FileName = applicationName
processObj.Star tInfo.Arguments = applicationArgs
processObj.Star tInfo.WorkingDi rectory = workingDirector y

If showWindow = True Then
processObj.Star tInfo.CreateNoW indow = False
Else
processObj.Star tInfo.CreateNoW indow = True
End If

processObj.Star t()
processObj.Wait ForExit()

Return processObj.Stan dardOutput.Read ToEnd
Catch ex As Exception
Return ""
End Try
End Function
"Cor Ligthert" <notfirstname@p lanet.nl> wrote in message news:<eRoAgymQE HA.2468@tk2msft ngp13.phx.gbl>. ..[color=blue]
> Hi Steve,
>
> Roughly copied from a program and changed
>
> I hope this helps?
>
> Cor
>
>
> \\\
> Dim p As New Process
> p.StartInfo.Use ShellExecute = False
> p.StartInfo.Red irectStandardOu tput = True
> p.StartInfo.Arg uments = myargumentstrin g
> p.StartInfo.Wor kingDirectory = myworkdirectory string
> p.StartInfo.Fil eName =C:\myprogram
> p.Start()
> Dim sr As IO.StreamReader = p.StandardOutpu t
> Dim sb As New System.Text.Str ingBuilder("")
> Dim input As Integer = sr.Read
> Do Until input = -1
> sb.Append(ChrW( input))
> input = sr.Read
> Loop
> ///[/color]