SetEnvironmentV ariable in Debug and Release cofiguratin

[denis.greatest]

Hello folks,

I was trying to set some environment variable for a process I create.
(The variables are my own, not system).

I use SetEnvironmentV araible() from C# code.
In Debug configuration this works fine, but in Release configuration
the action fails.
The return value is TRUE, and no Exception is thrown.

Any ideas ?!

[billr]

From the Platform SDK
--------------------------

Calling SetEnvironmentV ariable has no effect on the system environment
variables. The user can add or modify system environment variables using the
Control Panel. To programmaticall y add or modify system environment
variables, add them to the
HKEY_LOCAL_MACH INE\System\Curr entControlSet\C ontrol\Session
Manager\Environ ment registry key, then broadcast a WM_SETTINGCHANG E message.
This allows applications, such as the shell, to pick up your updates.

So, my next question is this ... how are you checking for your environment
variable, are you doing it programatically (calling GetEnvironmentV ariable)
or are you trying to find it in the EnvironmentVari ables tab of the control
panel, etc.

You will not be able to see the variable in your system environment
variables (via the control panel) every PROCESS has an environment block that
contains a set of environment variables and their values, you will have to
inspect these environment variables programatically .

I hope that helps.

:o))

--
--

Of all words of tongue and pen, the saddest are: "It might have been"
"de************ @gmail.com" wrote:

Hello folks,

I was trying to set some environment variable for a process I create.
(The variables are my own, not system).

I use SetEnvironmentV araible() from C# code.
In Debug configuration this works fine, but in Release configuration
the action fails.
The return value is TRUE, and no Exception is thrown.

Any ideas ?!

[DenG]

Thanks for the response ;)
I do the checks via GetEnviromnentV ariable and also via Process
Explorer, which is a very nice freeware utility.
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[billr]

How are you declaring your access to GetEnvironmentV ariableW?

Maybe like this?

[DllImport("KERN EL32.DLL", EntryPoint="Get EnvironmentVari ableW",
SetLastError=tr ue, CharSet=CharSet .Unicode, ExactSpelling=t rue,
CallingConventi on=CallingConve ntion.Winapi)]
public static extern uint GetEnvironmentV ariable(String name, ref string
value, uint length);
--
--

Of all words of tongue and pen, the saddest are: "It might have been"
"DenG" wrote:

Thanks for the response ;)
I do the checks via GetEnviromnentV ariable and also via Process
Explorer, which is a very nice freeware utility.
--
Sent via .NET Newsgroups
http://www.dotnetnewsgroups.com

[DenG]

Actually, it was:

// Import the Kernel32 dll file.
[DllImport("kern el32.dll",CharS et=CharSet.Auto , SetLastError=tr ue)]

[return:MarshalA s(UnmanagedType .Bool)]

// The declaration is similar to the SDK function.
public static extern bool SetEnvironmentV ariable(string lpName, string
lpValue);

This is the Set one.
BTW, it is taken from
http://support.microsoft.com/default...b;en-us;829145

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[billr]

Whoops, my bad, I meant to ask about SetEnvironmentV ariableW, NOT
GetEnvironmentV ariableW, but you seem to have figured that mistake out anyhow!

The following is a simple form app that tests this functionality. On my
machine it works fine in both debug and release builds .... try it on your
machine and see what happens.

/*************** *************** *************** ********** */
using System;
using System.Drawing;
using System.Componen tModel;
using System.Windows. Forms;
using System.Runtime. InteropServices ;

namespace CSTest
{
public class Form1 : System.Windows. Forms.Form
{
private System.Windows. Forms.TextBox txName;
private System.Windows. Forms.TextBox txValue;
private System.Windows. Forms.Button button1;
private System.Windows. Forms.Label label1;
private System.Windows. Forms.Label label2;
private System.Windows. Forms.Button button2;

private System.Componen tModel.Containe r components = null;
public Form1() { InitializeCompo nent(); }

protected override void Dispose( bool disposing )
{
if( disposing ) { if (components != null) { components.Disp ose(); } }
base.Dispose( disposing );
}

private void InitializeCompo nent()
{
this.txName = new System.Windows. Forms.TextBox() ;
this.txValue = new System.Windows. Forms.TextBox() ;
this.button1 = new System.Windows. Forms.Button();
this.label1 = new System.Windows. Forms.Label();
this.label2 = new System.Windows. Forms.Label();
this.button2 = new System.Windows. Forms.Button();
this.SuspendLay out();
this.txName.Loc ation = new System.Drawing. Point(56, 16);
this.txName.Nam e = "txName";
this.txName.Tab Index = 0;
this.txName.Tex t = "";
this.txValue.Lo cation = new System.Drawing. Point(56, 40);
this.txValue.Na me = "txValue";
this.txValue.Ta bIndex = 1;
this.txValue.Te xt = "";
this.button1.Lo cation = new System.Drawing. Point(160, 40);
this.button1.Na me = "button1";
this.button1.Ta bIndex = 2;
this.button1.Te xt = "set named";
this.button1.Cl ick += new System.EventHan dler(this.butto n1_Click);
this.label1.Aut oSize = true;
this.label1.Loc ation = new System.Drawing. Point(14, 16);
this.label1.Nam e = "label1";
this.label1.Siz e = new System.Drawing. Size(34, 16);
this.label1.Tab Index = 3;
this.label1.Tex t = "Name";
this.label2.Aut oSize = true;
this.label2.Loc ation = new System.Drawing. Point(14, 40);
this.label2.Nam e = "label2";
this.label2.Siz e = new System.Drawing. Size(33, 16);
this.label2.Tab Index = 4;
this.label2.Tex t = "Value";
this.button2.Lo cation = new System.Drawing. Point(160, 16);
this.button2.Na me = "button2";
this.button2.Ta bIndex = 5;
this.button2.Te xt = "get named ";
this.button2.Cl ick += new System.EventHan dler(this.butto n2_Click);
this.AutoScaleB aseSize = new System.Drawing. Size(5, 13);
this.ClientSize = new System.Drawing. Size(240, 69);
this.Controls.A dd(this.button2 );
this.Controls.A dd(this.label2) ;
this.Controls.A dd(this.label1) ;
this.Controls.A dd(this.button1 );
this.Controls.A dd(this.txValue );
this.Controls.A dd(this.txName) ;
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayo ut(false);
}

private void button1_Click(o bject sender, System.EventArg s e)
{
MessageBox.Show (string.Format( "SetEnvironment Variable returned :
{0}", LibWrap.SetEnvi ronmentVariable (txName.Text, txValue.Text))) ;
}

[STAThread]
static void Main() { Application.Run (new Form1()); }

private void button2_Click(o bject sender, System.EventArg s e)
{
MessageBox.Show (string.Format( "GetEnvironment Variable returned :
{0}", Environment.Get EnvironmentVari able(txName.Tex t)));
}

}
internal class LibWrap
{
[DllImport("KERN EL32.DLL", EntryPoint="Set EnvironmentVari ableW",
SetLastError=tr ue, CharSet=CharSet .Unicode, ExactSpelling=t rue,
CallingConventi on=CallingConve ntion.StdCall)]
public static extern bool SetEnvironmentV ariable(String name, String
value);
[DllImport("KERN EL32.DLL", EntryPoint="Get EnvironmentVari ableW",
SetLastError=tr ue, CharSet=CharSet .Auto)]
public static extern uint GetEnvironmentV ariable(String name, ref
string value, uint length);
}
}
/*************** *************** *************** ********** */

[billr]

ps. you can omit the DllImport for GetEnvironmentV ariableW, it isn't used :o)
--
--

Of all words of tongue and pen, the saddest are: "It might have been"
"billr" wrote:

Whoops, my bad, I meant to ask about SetEnvironmentV ariableW, NOT
GetEnvironmentV ariableW, but you seem to have figured that mistake out anyhow!

The following is a simple form app that tests this functionality. On my
machine it works fine in both debug and release builds .... try it on your
machine and see what happens.

/*************** *************** *************** ********** */
using System;
using System.Drawing;
using System.Componen tModel;
using System.Windows. Forms;
using System.Runtime. InteropServices ;

namespace CSTest
{
public class Form1 : System.Windows. Forms.Form
{
private System.Windows. Forms.TextBox txName;
private System.Windows. Forms.TextBox txValue;
private System.Windows. Forms.Button button1;
private System.Windows. Forms.Label label1;
private System.Windows. Forms.Label label2;
private System.Windows. Forms.Button button2;

private System.Componen tModel.Containe r components = null;
public Form1() { InitializeCompo nent(); }

protected override void Dispose( bool disposing )
{
if( disposing ) { if (components != null) { components.Disp ose(); } }
base.Dispose( disposing );
}

private void InitializeCompo nent()
{
this.txName = new System.Windows. Forms.TextBox() ;
this.txValue = new System.Windows. Forms.TextBox() ;
this.button1 = new System.Windows. Forms.Button();
this.label1 = new System.Windows. Forms.Label();
this.label2 = new System.Windows. Forms.Label();
this.button2 = new System.Windows. Forms.Button();
this.SuspendLay out();
this.txName.Loc ation = new System.Drawing. Point(56, 16);
this.txName.Nam e = "txName";
this.txName.Tab Index = 0;
this.txName.Tex t = "";
this.txValue.Lo cation = new System.Drawing. Point(56, 40);
this.txValue.Na me = "txValue";
this.txValue.Ta bIndex = 1;
this.txValue.Te xt = "";
this.button1.Lo cation = new System.Drawing. Point(160, 40);
this.button1.Na me = "button1";
this.button1.Ta bIndex = 2;
this.button1.Te xt = "set named";
this.button1.Cl ick += new System.EventHan dler(this.butto n1_Click);
this.label1.Aut oSize = true;
this.label1.Loc ation = new System.Drawing. Point(14, 16);
this.label1.Nam e = "label1";
this.label1.Siz e = new System.Drawing. Size(34, 16);
this.label1.Tab Index = 3;
this.label1.Tex t = "Name";
this.label2.Aut oSize = true;
this.label2.Loc ation = new System.Drawing. Point(14, 40);
this.label2.Nam e = "label2";
this.label2.Siz e = new System.Drawing. Size(33, 16);
this.label2.Tab Index = 4;
this.label2.Tex t = "Value";
this.button2.Lo cation = new System.Drawing. Point(160, 16);
this.button2.Na me = "button2";
this.button2.Ta bIndex = 5;
this.button2.Te xt = "get named ";
this.button2.Cl ick += new System.EventHan dler(this.butto n2_Click);
this.AutoScaleB aseSize = new System.Drawing. Size(5, 13);
this.ClientSize = new System.Drawing. Size(240, 69);
this.Controls.A dd(this.button2 );
this.Controls.A dd(this.label2) ;
this.Controls.A dd(this.label1) ;
this.Controls.A dd(this.button1 );
this.Controls.A dd(this.txValue );
this.Controls.A dd(this.txName) ;
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayo ut(false);
}

private void button1_Click(o bject sender, System.EventArg s e)
{
MessageBox.Show (string.Format( "SetEnvironment Variable returned :
{0}", LibWrap.SetEnvi ronmentVariable (txName.Text, txValue.Text))) ;
}

[STAThread]
static void Main() { Application.Run (new Form1()); }

private void button2_Click(o bject sender, System.EventArg s e)
{
MessageBox.Show (string.Format( "GetEnvironment Variable returned :
{0}", Environment.Get EnvironmentVari able(txName.Tex t)));
}

}
internal class LibWrap
{
[DllImport("KERN EL32.DLL", EntryPoint="Set EnvironmentVari ableW",
SetLastError=tr ue, CharSet=CharSet .Unicode, ExactSpelling=t rue,
CallingConventi on=CallingConve ntion.StdCall)]
public static extern bool SetEnvironmentV ariable(String name, String
value);
[DllImport("KERN EL32.DLL", EntryPoint="Get EnvironmentVari ableW",
SetLastError=tr ue, CharSet=CharSet .Auto)]
public static extern uint GetEnvironmentV ariable(String name, ref
string value, uint length);
}
}
/*************** *************** *************** ********** */

[DenG]

Do you have VS.NET 2003?
'Cause I have 2002.

Anyway, it didn't work at Release mode. Sorry :(

The solution was found:
http://www.dotnetnewsgroups.com/news...d.asp?ID=77768


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[billr]

I am using VS 2003, which could be the cause of the issue, however, all you
need to do is download the latest .net SDK and compile the code from the
command line and you should be able to test if this is the case or not.
Sorry I cannot be of any more help :o(

--
--

Of all words of tongue and pen, the saddest are: "It might have been"
"DenG" wrote:

Do you have VS.NET 2003?
'Cause I have 2002.

Anyway, it didn't work at Release mode. Sorry :(

The solution was found:
http://www.dotnetnewsgroups.com/news...d.asp?ID=77768


--
Sent via .NET Newsgroups
http://www.dotnetnewsgroups.com

[DenG]

Thanks for your concern though ;) !
BTW, I think eventually the problem is related to the different version
of the API in WIN32: the *A (ASCII) and *W (UNICODE) version.
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