Re: IDisposable.Dispose() - C# Discussion Boards

Pete O'Hanlon12-Dec-06 3:46

12-Dec-06 3:46

Microsoft Word 2003 uses a different type of option called Multiple SDI. .NET 2 has this option available to it by deriving your form class from WindowsFormsApplicationBase. An example can be found here:

http://en.csharp-online.net/Application_Architecture_in_Windows_Forms_2.0%E2%80%94Multiple-SDI_Applications[^]

the last thing I want to see is some pasty-faced geek with skin so pale that it's almost translucent trying to bump parts with a partner - John Simmons / outlaw programmer

Deja View - the feeling that you've seen this post before.

Re: Only One Child Window in MDI

h@s@n12-Dec-06 4:07

h@s@n

12-Dec-06 4:07

Thanks.

I have used this in my application. I have made
"Multiple Single Document Interface" for the Main Form of my application.

But now that Main Form is an MDI Parent Form. If I open first instance of application that gives me option to create a new file under the "File Menu". Now I want that file to show only close button in Menu bar and take all the MDI parent client space.

Is that possible?

I have made my Main Form as MDI Parent. I used to create new file using file menu, but how i can emit minimize and restore button in the menu bar. I want to show only close option.

Re: Only One Child Window in MDI

h@s@n12-Dec-06 4:58

h@s@n

12-Dec-06 4:58

please tell me how one child can be shown if Parent Mdi has Main MEnu and Toolbar.

I create Mdi child it doesn't fills whole client area of MdiParent.

Also when i close the MdiParent icon bar of child takes space up on the MdiParent Main Menu for a while and form closes although i have disabled child control box.

IDisposable.Dispose()

Jon Hulatt12-Dec-06 3:38

Jon Hulatt

12-Dec-06 3:38

Hi All,

I need to to dispose of some stuff in a class. But, the class derived from a class which also implements IDisposable.

The dispose method is not marked as virtual, I cannot override it.

How can I get my classes Dispose() called and then call Dispose() on it's base class?

Thanks

Jon

using System.Beer;

Re: IDisposable.Dispose()

Not Active12-Dec-06 4:26

Not Active

12-Dec-06 4:26

You need to have your derived class derive from IDisposable also and explictly implement the Dispose method, call the base dispose from there.

public class Foo : IDisposable<br />
{<br />
    public Foo()<br />
    {<br />
<br />
    }<br />
<br />
    public void Dispose()<br />
    {<br />
    }<br />
}<br />
<br />
public class Bar : Foo, IDisposable<br />
{<br />
    public Bar()<br />
    {<br />
<br />
    }<br />
<br />
    void IDisposable.Dispose()<br />
    {<br />
        base.Dispose();<br />
    }<br />
}

only two letters away from being an asset

Re: IDisposable.Dispose()

Pete O'Hanlon12-Dec-06 4:29

Pete O'Hanlon

12-Dec-06 4:29

Try this:

namespace TestDisposable
{
	/// <summary>
	/// Summary description for DisposeClasses.
	/// </summary>
	public class DisposeClass : IDisposable
	{
		public DisposeClass()
		{
			//
			// TODO: Add constructor logic here
			//
		}
		#region IDisposable Members

		public void Dispose()
		{
			// TODO:  Add DisposeClass.Dispose implementation
			Console.WriteLine("Called dispose in DisposeClass");
		}

		#endregion
	}

	public class Class2 : DisposeClass, IDisposable
	{
		public new void Dispose()
		{
			base.Dispose();
			Console.WriteLine("Called dispose in Class2");
		}

		public void DoIt()
		{
		}
	}
}

Re: IDisposable.Dispose()

Jon Hulatt12-Dec-06 5:26

Jon Hulatt

12-Dec-06 5:26

Thanks guys,

I thought i'd tryed that in the myriad things I tried, but evidentally not. I'll get back on it.

using System.Beer;

Re: IDisposable.Dispose()

Scott Dorman13-Dec-06 3:03

Scott Dorman

13-Dec-06 3:03

Your class also needs to derive from IDisposable and call base.Dispose() in your Dispose method.

You can also look here for more information:

http://www.codeproject.com/useritems/idisposable.asp[^]

-----------------------------
In just two days, tomorrow will be yesterday.

From C# to office visio enterprise

Yustme12-Dec-06 3:15

Yustme

12-Dec-06 3:15

Hi,

Does anyone know how to export my code to visio so it will be an UML diagram?

Thanks in advance!

Re: From C# to office visio enterprise

Vasudevan Deepak Kumar12-Dec-06 3:20

Vasudevan Deepak Kumar

12-Dec-06 3:20

From project menu, you should be having an option to Reverse Engineer to Visio right?

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

Re: From C# to office visio enterprise

Yustme12-Dec-06 3:24

Yustme

12-Dec-06 3:24

Hi Vasudevan Deepak Kumar,

Thanks for your reply!

Strange, i don't see that link. I got vs 2005.

I'll check it out, i needed the "key word" to do this.

Thanks!

Re: From C# to office visio enterprise

Pete O'Hanlon12-Dec-06 3:26

Pete O'Hanlon

12-Dec-06 3:26

If you've got VS2005 why do you need to reverse engineer to Visio? You can create a class diagram in Visual Studio directly.

How many instances do I have in the following example?

Shy Agam12-Dec-06 2:50

Shy Agam

12-Dec-06 2:50

Hello,

How many instances of x do I have in the following example?

class MyBaseClass<br />
{<br />
    protected static int x;<br />
}<br />
<br />
class MyDerived1 : MyBaseClass { }<br />
class MyDerived2 : MyBaseClass { }<br />
<br />
MyDerivedClass1 c1;<br />
MyDerivedClass1 c2;<br />
<br />
MyDerivedClass2 c3;<br />
MyDerivedClass2 c4;

I would say for sure that c1 and c2 share the same x.
But what about c3 and c4?
Do they share c1's and c2's x?
Is a new static x allocated for them?

Thanks in advance,
Shy.

Re: How many instances do I have in the following example?

baerten12-Dec-06 3:09

baerten

12-Dec-06 3:09

Hi, i would say that x has every where the same value.

Because the static-Element is a type, outside of all instances.
Each instance has access to this variable and can manipulate it.
And your derived classes have derived this permission to this element.
So i think all instances can alternate this static variable.

I never use/try it before, but it seems logic for me.

Re: How many instances do I have in the following example?

Pete O'Hanlon12-Dec-06 3:21

Pete O'Hanlon

12-Dec-06 3:21

Why not try and code it up and see what you get when running it? You've done the hard work already so testing it should be easy.

Re: How many instances do I have in the following example?

Shy Agam12-Dec-06 3:28

Shy Agam

12-Dec-06 3:28

Just did... Big Grin | :-D

It appears that only one instance of X is allocated.

Re: How many instances do I have in the following example?

Pete O'Hanlon12-Dec-06 3:44

Pete O'Hanlon

12-Dec-06 3:44

Which is consistent with the behaviour of static. Big Grin | :-D

autoscroll property of an MDI

sathishtl00712-Dec-06 1:36

sathishtl007

12-Dec-06 1:36

Hi,

How can I set the autoscroll property of an MDI from without losing its MDIcontainer property.

When I set the AutoScroll Property to "True", IsMdiContainer Property is automatically set to "False". How can I make both the property to true simultaneously.

If anyone has any idea, please reply me soon.

Thanks

Re: autoscroll property of an MDI

stancrm12-Dec-06 1:53

stancrm

12-Dec-06 1:53

I've tried it in VS2005, if you set IsMdiContainer = true, then you can see that AutoScroll will be set to false, but if I try to put the window outside the border, scrollbar will be shown. That means, AutoScroll is always true (don't see Properties Window... Smile | :)

) if you set IsMdiContainer=true.

Re: autoscroll property of an MDI

sathishtl00712-Dec-06 2:08

sathishtl007

12-Dec-06 2:08

But the problem is that Whatever the child window size the scroll bar is showing
for a fixed size. I want this autoscroll property for zooming in and out the images in a child window.

Re: autoscroll property of an MDI

Pete O'Hanlon12-Dec-06 2:32

Pete O'Hanlon

12-Dec-06 2:32

Then the autoscroll should be on the child form.

How to pass a form name to a sub program

mwith12-Dec-06 1:32

mwith

12-Dec-06 1:32

Hi All,
I am new to C# and OOP. I refered a article about Single instance child for in MDIhttp://www.codeproject.com/csharp/single_instance.asp?df=100&forumid=51798&select=1394073#xx1394073xx[^])

I tried to write a sub program to stop that code duplication as follows

private void frmLoad(Form frmNew)<br />
        {<br />
            Form[] charr = this.MdiChildren;<br />
            if (charr.Length == 0)      // no child form is opened<br />
            {<br />
                frmNew sus = new frmNew();<br />
                sus.MdiParent = this;<br />
                sus.StartPosition = FormStartPosition.Manual;<br />
                sus.Location = new Point(0, 0);<br />
                sus.Show();<br />
            }<br />
            else      // child forms are opened<br />
            {<br />
                int count = 0;<br />
                foreach (Form chform in charr)<br />
                {<br />
                    if (chform.Name == "frmNew")// one instance of the form is opened<br />
                    {<br />
                        chform.Activate();<br />
                        count = 0;<br />
                        break;   // exit loop<br />
                    }<br />
                    else<br />
                        count++;<br />
                }<br />
                if (count > 0)<br />
                {<br />
                    frmNew sus = new frmNew();<br />
                    sus.MdiParent = this;<br />
                    sus.StartPosition = FormStartPosition.Manual;<br />
                    sus.Location = new Point(0, 0);<br />
                    sus.Show();<br />
                }<br />
<br />
            }<br />
        }

I want to pass a form name as a argument. what is wrong with this?

Please can anybody help me? Cry | :((

mWith

Re: How to pass a form name to a sub program

stancrm12-Dec-06 1:49

stancrm

12-Dec-06 1:49

Just create a member variable for frmNew:

private Form2 frmNew = null;
private void CreateFrmNew()
{
  if (frmNew == null)
  {
    frmNew = new Form2();
    frmNew.MdiParent = this;
    frmNew.StartPosition = FormStartPosition.Manual;
    frmNew.Location = new Point(0, 0);
  }

  frmNew.Show();
}

Call CreateFrmNew, it will create frmNew if not exists, otherwise frmNew will be shown.

one port for many clients Or many ports for each client ?

MarkPhB12-Dec-06 1:25

MarkPhB

12-Dec-06 1:25

Hi im writing a TCP Server/Client application and i have a general Question. Smile | :)

When i have a TcpServer that will communicate with many clients.

Shall i communicate with the clients over one port

OR

Shall i communcate with the clients over one several port for each client ?

OR

Is it so, that the .NET-Framework handle this for itself and its no problem
to communicate with many client over one port ? Sniff | :^)

Re: one port for many clients Or many ports for each client ?

stancrm12-Dec-06 1:32

stancrm

12-Dec-06 1:32

Everytime the client connected to your server, it will create a new TcpClient instance. That's why, you must use:

TcpClient tcpClient = tcpServer.AcceptTcpClient();

Just add this tcpClient to a list, and you can manage your connection to many clients using each tcpClient.

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