C# Discussion Boards - CodeProject

Robert Rohde20-Jul-06 10:49

20-Jul-06 10:49

You have to understand that you are working within a managed environment. Calling Dispose explicitely tells the image to release its resources immediately. Nevetheless the reference to it is still there. And even if you set all references to null the object will still remain in memory until the garbage collector makes his next round and destroys it. In case of the image (and most other objects) the finalizer will call Dispose if you haven't done so before. So there is no big need to call dispose. Its just a bit cleaner and gives you more control on when the resources are freed because the garbage collector is working unregulary and unpredictable.

Re: Dispose method - release resource

Andrei Ungureanu18-Jul-06 19:48

Andrei Ungureanu

18-Jul-06 19:48

It's true that you don't need to do any disposing on this example. But if you insist you could try forcing the Garbage Collector to realease all resources that are no longer used: "GC.Collect()".

Do your best to be the best

Hosting .NET Windows Forms Controls in IE

JuanAlbertoMD18-Jul-06 12:29

JuanAlbertoMD

18-Jul-06 12:29

Hello!!

I made a control which contains a RichTextBox and2 buttons.
One button open a text file and the other save a text file:

//---OPEN
OpenFileDialog open = new OpenFileDialog();
open.Filter = "Text files (*.txt)|*.txt";

if (open.ShowDialog() == DialogResult.OK)
richTextBox1.LoadFile(open.FileName);

//---SAVE
SaveFileDialog save = new SaveFileDialog();
save.Filter = "Text files (*.txt)|*.txt";

if (save.ShowDialog() == DialogResult.OK)
richTextBox1.saveFile(save.FileName);

And i want to host the control in Internet Explorer.

Then i create an html file:

RichTextBox Control

<object id="RichTextBoxControl1"
classid="http:RichTextBoxControl.dll#RichTextBoxControl.RichTextBoxCtl"
height="500" width="500" viewastext="">

And i Configure the Virtual Directory.

I open the html page and i can see the control but when i want to open a text file an exception appears:

System.Security.SecurityException: 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

Also i configure the permissions in the .NET Framework 2.0 Configuration but the same exception appears.

Somebody knows if i am missing something.

Regards,
Alberto Martinez

Re: Hosting .NET Windows Forms Controls in IE

User 171649218-Jul-06 12:47

User 1716492

18-Jul-06 12:47

Trust you havenot forgotton that Javascript and VBScript are unable to access your hard drive from a web page without using an Active X Control.

Please read the ENTIRE thread starting with [^]

modified 1-Aug-19 21:02pm.

WCL problem

-Yoyosh-18-Jul-06 12:22

-Yoyosh-

18-Jul-06 12:22

I have Windows Control Library (derived from Control).

I wish my own custom type editor to allow the user to select something. I already made it (2 classes - one derived from System.Windows.Forms.UserControl, second from System.Drawing.Design.UITypeEditor.

In first of these I overriden OnPaint method and set Region property.

In second, I overriden:

        public override System.Drawing.Design.UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)<br />
        {<br />
            return UITypeEditorEditStyle.DropDown;<br />
        }<br />
<br />
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)<br />
        {<br />
            return 0; //simplicity for testing<br />
        }

In the class derived from control I set a property:

[Category("Shape"), Description("Color at center")]<br />
        [BrowsableAttribute(true)]<br />
        [EditorAttribute(typeof(ShapePicker), typeof(System.Drawing.Design.UITypeEditor))]<br />
        public int CenterColor<br />
        {<br />
            get { return 3; }<br />
            set<br />
            { MessageBox.Show(value.ToString()); }<br />
            }<br />
        }

When I create a Win Project and put this WCL on the form, all goes well, the property is shown. But when I click on that property`s ellipse (for the custrom type editor to be opened), nothing is being shown. It looks as if the EditValue method is being called immediately after opening this custrom type editor.
---------------------------------------------------------------------------------
Could you please tell me why is that? Why I canon choise anything from this custorm type editor?

thank you very much for any help Smile | :)

All pipe instances are busy" when working with IpcChannel

Ilia Blank18-Jul-06 9:53

Ilia Blank

18-Jul-06 9:53

Sometimes (less that 1% of the calls) I am getting “System.Runtime.Remoting.RemotingException: Port is Busy: All pipe instances are busy” on remote method invocation when using IpcChannal.

Has anybody experienced the same problem?
Suggested solutions?

animation on win form like that of MSN messenger?

sinanju18-Jul-06 9:47

sinanju

18-Jul-06 9:47

How can I display the animation on the win form like that of MSN messenger, which is displayed when we click the login button?

By simply placing an animated gif file on the win form, it starts animating, even in design mode.

But, I want to display it for some button's click event, like exactly that of MSN messenger. Any idea?

Re: animation on win form like that of MSN messenger?

Josh Smith18-Jul-06 9:52

Josh Smith

18-Jul-06 9:52

Use a timer, when it ticks show the "next" image in an image sequence.

:josh:
My WPF Blog[^]

Re: animation on win form like that of MSN messenger?

sinanju18-Jul-06 10:03

sinanju

18-Jul-06 10:03

thank you :josh: for the reply.

The messenger animation may be like what you've said. But, I have a single animated gif file, whose animation is on its own. Do u have any solution for this scenerio?

Re: animation on win form like that of MSN messenger?

leppie18-Jul-06 9:58

leppie

18-Jul-06 9:58

sinanju wrote:
But, I want to display it for some button's click event, like exactly that of MSN messenger. Any idea?

They are done in Macromedia Flash.

xacc.ide-0.2.0 preview - Now in 100% C# goodness

Re: animation on win form like that of MSN messenger?

sinanju18-Jul-06 10:06

sinanju

18-Jul-06 10:06

Thank you leppie, for you reply.

Here how can i manage to display it, some threading will do the trick, so that i can move the form around while the animation is on?

Re: animation on win form like that of MSN messenger?

sinanju18-Jul-06 10:18

sinanju

18-Jul-06 10:18

I've searched a link

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=530668&SiteID=1

It seems to me relevant, I'll try it later.

DateTime

NewbProgrammer18-Jul-06 9:36

NewbProgrammer

18-Jul-06 9:36

Hi the NewbProgrammer is back!
Im making a simple for a video game. What this program has is a lable in which the current time is displayed using DateTime.Now.ToString();. How do i get it to auto update. Thank you for taking the time to read this.

Re: DateTime

User 665818-Jul-06 9:39

User 6658

18-Jul-06 9:39

Create a Timer with and interval of 1000ms.

Sample

regards

modified 12-Sep-18 21:01pm.

Re: DateTime

Josh Smith18-Jul-06 9:39

Josh Smith

18-Jul-06 9:39

Use a System.Windows.Forms.Timer, hook the Tick event, in there set the label's text.

:josh:
My WPF Blog[^]

In your paint event

Ennis Ray Lynch, Jr.18-Jul-06 10:38

Ennis Ray Lynch, Jr.

18-Jul-06 10:38

Redraw the time. In fact you probably don't need a label for it either. Graphics.DrawString might consume less resources than a label.

A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."

-- Stephen Crane

Re: DateTime

NewbProgrammer18-Jul-06 12:13

NewbProgrammer

18-Jul-06 12:13

Thanks a lot you guys it was really helpful

MWA HAHAHAHA I AM A NOOB AND WE NOOBS WILL KILL YOU ALL. JK

Copying an image from RTF to clipboard

likefood18-Jul-06 7:40

likefood

18-Jul-06 7:40

I have this RichTextBox. At some point, the RichTextBox might have a little image in it. When the image is selected, the myRichTextBox.Copy() method doesn't properly copy the image data to the clipboard. I know this because MS Paint complains when I try to paste it therein.

Can someone please show me how to get a selected image (in a RichTextBox) copied properly to the clipboard? I assume I'll have to use the Clipboard class, right? I'm not sure how...

-Daniel
Typing too fast fro my owngood

MAC style window form [modified]

Mike Jeferson18-Jul-06 7:33

Mike Jeferson

18-Jul-06 7:33

Hi,

Anyone know how to create a .NET form control with MAC style.
Here is a sample what I mean: http://www.econtechvn.com/en/macuisuite_detail.htm but is has to be bought. I'm looking for any code or free resources to help me acomplish it myself

-- modified at 13:36 Tuesday 18th July, 2006

Re: MAC style window form

likefood18-Jul-06 7:47

likefood

18-Jul-06 7:47

Override OnPaint. That's what I would do...

-Daniel
Typing too fast fro my owngood

Re: MAC style window form

Dan Neely18-Jul-06 8:07

Dan Neely

18-Jul-06 8:07

Buying a 3rd party UI set will almost certainly cost less than writing the same controls yourself.

Re: MAC style window form

Josh Smith18-Jul-06 8:10

Josh Smith

18-Jul-06 8:10

dan neely wrote:
Buying a 3rd party UI set will almost certainly cost less than writing the same controls yourself.

I agree. Especially if you're going into it with no idea of if/how it can be done.

:josh:
My WPF Blog[^]

Re: MAC style window form [modified]

Mike Jeferson18-Jul-06 8:21

Mike Jeferson

18-Jul-06 8:21

Thanks for your comment, but still I want to do it myself, I'm almost intermediate in C# I could be able to get through of it. plus once I had Smile | :)

seen an article with source code on the web but I forgot the address at this time and I went no where by searching the web.
Please for those who know anything about the soulution let me know.
Thanks.

-- modified at 14:22 Tuesday 18th July, 2006

Checkbox and save setting

Saamir18-Jul-06 6:42

Saamir

18-Jul-06 6:42

Hi guys,
Is there a way to save checkbox setting, i.e. checked/unchecked. When the application is installed make it unchecked and then once the user checks it then keep it checked until the setting is changed again in the future.

Is this possible?

sasa

Yes

Ennis Ray Lynch, Jr.18-Jul-06 6:43

Ennis Ray Lynch, Jr.

18-Jul-06 6:43

A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."

-- Stephen Crane

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.