Re: monitor for handle leak - C# Discussion Boards

Re: Problem in Calling an MS Access Stored Procedure which in turn calls a Macro Function

5-Jun-08 1:57

Sorry I cant help then Frown | :(

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

Rafferty Uy5-Jun-08 4:05

Rafferty Uy

5-Jun-08 4:05

haha! okay, thanks for trying. Smile | :)

Rafferty

monitor for handle leak

George_George4-Jun-08 20:48

4-Jun-08 20:48

Hello everyone,

I want to monitor whether the handles of my C# application is released timely. The handles I mean various native handles wrapped by various Stream classes, like XMLReader/XMLWriter, Request.InputStream of Http request, etc.

(I do not use any native handles directly, and I only use C# wrap class like StreamReader.)

Currently, I am using Process Explorer --> Select the specific process for my C# application --> Select Properties --> Select Performance Tab --> Watch for "Handles" (including Handles, GDI Handles and USER Handles).

My questions are,

1. Is it the correct method to serve my purpose?
2. Any better tools or methods to use? Smile | :)

thanks in advance,
George

S. Senthil Kumar4-Jun-08 22:59

4-Jun-08 22:59

You could also use Perfmon (perfmon.msc) to track the number of handles open in the process. Perfmon can also log the information, which will be useful if you run the application for an extended period of time.

Regards
Senthil [MVP - Visual C#]
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George_George4-Jun-08 23:06

4-Jun-08 23:06

Thanks Senthil,

Do you mean the Handle Count for process counter? Or anything better?

regards,
George

S. Senthil Kumar4-Jun-08 23:28

4-Jun-08 23:28

George_George wrote:
Do you mean the Handle Count for process counter?

Yes, I meant that.

That apart, if the objects wrapping the handles implement finalizers, and you don't accumulate references to such objects, the handle count should remain relatively constant.

Regards
Senthil [MVP - Visual C#]
_____________________________
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George_George4-Jun-08 23:43

4-Jun-08 23:43

Thanks Senthil!

1.

"That apart, if the objects wrapping the handles implement finalizers, and you don't accumulate references to such objects, the handle count should remain relatively constant." -- means if Finalizer is not called, the handle to be released in Finalizer is still counter as part of the Handle Count counter, but when Finalizer is called, the handle will not be counter as part of the Handle Count counter?

2.

If I call Close immediately after using the handle or using "using" block, then handle could be closed immediately, and and Handle Count is reduced immediately?

regards,
George

S. Senthil Kumar5-Jun-08 0:06

5-Jun-08 0:06

George_George wrote:
means if Finalizer is not called, the handle to be released in Finalizer is still counter as part of the Handle Count counter, but when Finalizer is called, the handle will not be counter as part of the Handle Count counter?

There is no magic there. The finalizer, if implemented properly, will close any handles held by that object and therefore the counter will go down.

George_George wrote:
If I call Close immediately after using the handle or using "using" block, then handle could be closed immediately, and and Handle Count is reduced immediately?

Yes, as long as the object correctly implements the IDisposable pattern.

Regards
Senthil [MVP - Visual C#]
_____________________________
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George_George5-Jun-08 0:39

why image is not update in other form , on 2nd form closed event ?

5-Jun-08 0:39

Thanks Senthil!

Question answered.

regards,
George

nomi4-Jun-08 20:42

nomi

4-Jun-08 20:42

Here is the code what is the probelm any one can help me plzzzzz

protected override void OnClosed(EventArgs e)
{
if (this.appWorkspace.ActiveDocumentWorkspace != null)
{
appWorkspace.ActiveDocumentWorkspace.SetTool(null);
}

base.OnClosed(e);

//n send image to frmedit in cc13
CCI3.Forms.frmEdit s = new CCI3.Forms.frmEdit();
// s.mSetPicture(PictureBox, "true");
//s.VarEditImg
//s.VarEditSig
s.PicImage.Image = null;

s.PicImage.Image = Image.FromFile(@"C:\Temp\Temp1.jpg");
s.PicImage.Refresh();

s.picSig.Image = null;

s.picSig.Image = Image.FromFile(@"C:\Temp\Temp2.jpg");
s.picSig.Refresh();
//s.Con
s.Showimg();

CCI3.Myimg g = new CCI3.Myimg();
g.Showimg2();

//CCI3.Forms.frmEdit ss = new CCI3.Forms.frmEdit();
//ss.setEditPictures(@"C:\Temp\Temp1.jpg", @"C:\Temp\Temp2.jpg");

}

Re: why image is not update in other form , on 2nd form closed event ?

leppie4-Jun-08 23:04

Re: why image is not update in other form , on 2nd form closed event ?

4-Jun-08 23:04

nomi wrote:
Here is the code what is the probelm any one can help me plzzzzz

nomi wrote:
CCI3.Forms.frmEdit s = new CCI3.Forms.frmEdit();

You are creating form and not adding it anywhere to you application, so it will fail.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

J a a n s4-Jun-08 23:04

J a a n s

4-Jun-08 23:04

You have just given a bunch of code which one else is aware of. If you need a proper solution you have to explain your problem correctly.

Ok, Here is the clue. In the following line of code you are creating a new object which will be disposed once the scope is over.

CCI3.Forms.frmEdit s = new CCI3.Forms.frmEdit();

Instead refer to the existing instance of your form.

Note: If you are using CAB, you can take the help of event broker.

Re: why image is not update in other form , on 2nd form closed event ?

wasimsharp4-Jun-08 23:50

wasimsharp

4-Jun-08 23:50

hello nomi
mujay apkay maslay ka pata chel gya hay

f.show();
ki jaga

f.showDialog(); use kero subkhuch tik ho ji ga.
Begham ho jao Nomi

if this answere is helpfull then donot forget to mark [Smile]

wasim khan

Ignore - repost

Guffa5-Jun-08 1:38

Guffa

5-Jun-08 1:38

I have already explained why it doesn't work, and I am not the only one who has done that.

Don't repost the same question. That way it seem like you are simply ignoring the people who tries to help you. In the long run you will just end up being ignored by everyone.

Despite everything, the person most likely to be fooling you next is yourself.

bind grid using cascade drop down with out postback

Member 38798814-Jun-08 20:42

Member 3879881

4-Jun-08 20:42

Hi i have cascading dropdown,
In that i have bind some datas from my database,
Now based on the selection my grid want to bind with out postback event,
Anypossiblity is there to do?,
Plz hlp me,

Thanks & Regards,
NeW OnE,
please don't forget to vote on the post

Re: bind grid using cascade drop down with out postback

leppie4-Jun-08 23:05

Re: bind grid using cascade drop down with out postback

4-Jun-08 23:05

New one wrote:
Anypossiblity is there to do?,

Yes, in the ASP.NET forum.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

wasimsharp5-Jun-08 0:21

wasimsharp

5-Jun-08 0:21

use ajax

wasim khan

Type.GetFields Method (BindingFlags)

George_George4-Jun-08 19:40

4-Jun-08 19:40

Hello everyone,

From MSDN about Type.GetFields Method (BindingFlags),

http://msdn.microsoft.com/en-us/library/6ztex2dc(VS.80).aspx

What means "When overridden in a derived class, searches for the fields defined for the current Type"? I can not find related description for this point in the MSDN related sample. Especially "overridden in a derived class" and "defined for the current Type"?

thanks in advance,
George

S. Senthil Kumar4-Jun-08 22:57

4-Jun-08 22:57

George_George wrote:
What means "When overridden in a derived class, searches for the fields defined for the current Type"?

System.Type is an abstract class, and GetFields is an abstract method. There are several classes that derived from Type, and MSDN says that when it is overridden in a derived class, it must return the fields associated with the "underlying" type that the Type object represents.

Regards
Senthil [MVP - Visual C#]
_____________________________
My Blog | My Articles | My Flickr | WinMacro

George_George4-Jun-08 23:00

4-Jun-08 23:00

Thanks Senthil,

I have written a test case, I am using a base class type variable to point to a derived type and in the derived type, I override a method of base class.

But it seems I can get nothing in variable fields. Any ideas?

class Program
{
    class Foo
    {
        public static int abc;
        virtual public void bcd()
        {

        }
    }

    class Goo : Foo
    {
        override public void bcd()
        {

        }
    }

    static void Main(string[] args)
    {
        Foo f = new Goo();
        FieldInfo[] fields = f.GetType().GetFields(BindingFlags.Instance | BindingFlags.Public);

        return;
    }
}

regards,
George

S. Senthil Kumar4-Jun-08 23:24

4-Jun-08 23:24

George_George wrote:
But it seems I can get nothing in variable fields. Any ideas?

The text in the MSDN page is for people deriving from System.Type, for whatever reason. From a user's perspective, it returns the list of fields in the class represented by the Type.

Regards
Senthil [MVP - Visual C#]
_____________________________
My Blog | My Articles | My Flickr | WinMacro

George_George4-Jun-08 23:44

4-Jun-08 23:44

Thanks Senthil,

The fields only for member variables, not for functions?

regards,
George

S. Senthil Kumar5-Jun-08 0:03

5-Jun-08 0:03

GetFields returns only fields (member variables) in that type. Type.GetMethods[^] returns functions defined in that Type.

Regards
Senthil [MVP - Visual C#]
_____________________________
My Blog | My Articles | My Flickr | WinMacro

George_George5-Jun-08 0:51

5-Jun-08 0:51

Thanks Senthil,

Looks like GetMembers return both methods and fields, and GetMethods/GetFields returns just method/field? So, GetMembers is more powerful. Smile | :)

regards,
George

leppie5-Jun-08 0:18