Visual Basic

Re: Semi Transparent Controls

4-Sep-07 4:29

errorfunktion wrote:
It's not true that color.transparent simply gives the control the
container background.

Wanna bet??

errorfunktion wrote:
If I manually give the control the same background as the
form the circle is not visible.

No kidding. That's exactly what is expected.

If you have a background image on the form, the control with the Transparent background WILL show the background image of the form that contains it. Any controls between the background of the form and the Transparent control will NOT show through. The background of the control will take a snippet of the form's background image and make that snippet the background image of the control.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

errorfunktion4-Sep-07 13:23

errorfunktion

4-Sep-07 13:23

Why the sarcasm Dave? After all you agree with me. Smile | :)

Color.Transparent also tells the control to get its background image from
it's container, and hence it does more than simply set it's own background to the same color. Semantics. Never mind.

Meanwhile I've made some progress. I've created a derived button class called MyButton. I also have a regular old button, I've written this code in it's event handler:

Dim img as New Bitmap(TransparentControl.Width,TransparentControl.Height)
Dim GraphicsObject as Graphics=Graphics.FromImage(img)
'I now use a translation transform to account for the diffrence in position
'of the transparent control and the MyButton object:
GraphicsObject.TranslateTransform( _
MyButton1.Location.X-TransparentControl.Location.X, _
MyButton1.Location.Y-TransparentControl.Location.Y)

'I now call the derived Button's OnPaint Event using the Graphics object I
Just created.

MyButton1.OnPaint(New PaintEventArgs( _
GraphicsObject,TransparentControl.DisplayRectangle))

'And Finally I set the Transparent control background image to this image.

TransparentControl.BackgroundImage=img

The derived buttons shape (It's white body) is properly located and visible
on the back of my control. But the buttons text caption is not translated for some reason.
Is the the caption not drawn in the OnPaint Event or something?

Re: Semi Transparent Controls

Dave Kreskowiak4-Sep-07 15:46

Semi Transparent Controls, Works!

4-Sep-07 15:46

errorfunktion wrote:
Why the sarcasm Dave? After all you agree with me.

That's not how it sounded to me...

errorfunktion wrote:
I've created a derived button class called MyButton. I also have a regular old button, I've written this code in it's event handler:

Which event??

errorfunktion wrote:
Dim img as New Bitmap(TransparentControl.Width,TransparentControl.Height)
Dim GraphicsObject as Graphics=Graphics.FromImage(img)
'I now use a translation transform to account for the diffrence in position
'of the transparent control and the MyButton object:
GraphicsObject.TranslateTransform( _
MyButton1.Location.X-TransparentControl.Location.X, _
MyButton1.Location.Y-TransparentControl.Location.Y)

'I now call the derived Button's OnPaint Event using the Graphics object I
Just created.

MyButton1.OnPaint(New PaintEventArgs( _
GraphicsObject,TransparentControl.DisplayRectangle))

You're going to have to explain this a bit better. Where is this code?? Does your button class derive from Button, or from UserControl??

errorfunktion wrote:
'And Finally I set the Transparent control background image to this image.

TransparentControl.BackgroundImage=img

What TransparentControl? Where did this come from??

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

errorfunktion5-Sep-07 0:28

errorfunktion

5-Sep-07 0:28

Well I got it working. Here's a couple of screenshots:

http://rapidshare.com/files/53533392/tccontrol1.bmp.html
http://rapidshare.com/files/53531028/tcontrol2.bmp.html

In the forms paint event I have drawn a circle in the upper left corner.
I have also placed a button in the upper left corner.
The arrow shaped thingy is my control.

All You need is a derived control in my case:

Public Class TransparentControl
Inherits Control
'Set These Options:
Public Sub New()
SetStyle(ControlStyles.SupportsTransparentBackColor, True)
BackColor = Color.Transparent 'It might be necessary to override the base 'backcolor property

'Add some code to the paint event to draw the control and use a color with alpha level less then 255.

'As you can see in the first screen capture the form background is visible, but the control is obscured.
' To make the button also visible through the control you can use the button's draw to bitmap method and set that bitmap as
' the controls background image.
' Right now this code is in the button's paint event handler and it makes things a bit twitchy.
There's probably a better position for it.

Private Sub Button1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Button1.Paint
Dim control_rect As New Rectangle(Me.TransparentControl1.Location, Me.TransparentControl1.Size)

Dim button_rect As New Rectangle(Me.Button1.Location, Me.Button1.Size)
'Checks If the control area's recangle interesects with the button's
If control_rect.IntersectsWith(button_rect) Then
'Find the area of the intersection
control_rect.Intersect(button_rect)
'Offset the area of intersection to account for the different positions
control_rect.Offset(-Me.TransparentControl1.Location.X, -Me.TransparentControl1.Location.Y)
Dim im As New Bitmap(Me.TransparentControl1.Width, Me.TransparentControl1.Height)
Me.Button1.DrawToBitmap(im, control_rect)
Me.TransparentControl1.BackgroundImage = im
End If

End Sub

That's It.

Thanks for the help Dave

Gary

Re: Semi Transparent Controls, Works!

Dave Kreskowiak5-Sep-07 2:09

Installation of application

5-Sep-07 2:09

You may want to play around with this some more. Like moving other windows over the top of your controls and away so that they repaint. Moving your window off-screen and back on again. minimizing and restoring your window. Anything else you can think of. Your control has to stand up to being repainted in every situation you can think of.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Web Service timeout

Diego F.4-Sep-07 1:33

Diego F.

4-Sep-07 1:33

Hello. I'm migrating an application that connects to a remote machine. Before it used sockets, and now a web service. I'm not sure about how to control the time to wait for a response. I'm looking for a kind of timer that waits some time and if it has no response, throws an exception.

How can I do that?

Regards,

Diego F.

Re: Web Service timeout

Kschuler4-Sep-07 4:10

Kschuler

4-Sep-07 4:10

You can set the amount of time the webservice will work before sending back an error by setting the executionTimeout attribute in the web.config. Just like you would for a website, like this:
<httpRuntime executionTimeout="180"/>

Then you can put your call to the webservice in a try catch block. The timeout error is a System.Net.WebException. You may want to make sure the message includes the correct error message, though, since there are other System.Net.WebExceptions that could fire. So it would look something like this:

Try
  myWebService.MyWebServiceMethod(parm1)
Catch ex as System.Net.WebException
  If ex.Message.ToUpper.Contains("TIMED OUT") Then
    msgbox("Web service method timed out.")
  Else
    msgbox("Web error: " & ex.Message)
  End If
Catch ex as Exception
  msgbox("Error: " & ex.Message)
End Try

Roes1234-Sep-07 0:14

Roes123

4-Sep-07 0:14

How do I create and update environment variables in the installtion package ? Unsure | :~

Re: Installation of application

ncjlee4-Sep-07 3:31

ncjlee

4-Sep-07 3:31

perhaps u can try at file menu --> build --> publish

Re: Installation of application

Roes1234-Sep-07 3:41

Roes123

4-Sep-07 3:41

I can not see how this will update for example the path variable ?

Howto dynamic call of a method

Stephan Pilz3-Sep-07 23:49

Stephan Pilz

3-Sep-07 23:49

Hello,

I have a class with many static methods. Now I want call methods from this class during runtime. The name of the method and the parameter names/values are given by string. (Background: The methods contain code for filling comboboxes and I want to write an AJAX-Solution to fill different types of comboboxes initiated by user-click inside a web page)

Now I'm in a state of confusion, if that's possible. NOTE: Must be work with Framework 1.1 !!!

Can anybody help me, please ?

Stephan

                   \\\|///
                 \\  - -  //
                  (  @ @  )
+---------------oOOo-(_)-oOOo-----------------+
| Stephan Pilz   stephan.pilz@stephan-pilz.de |
|                <a href=http://www.stephan-pilz.de>www.stephan-pilz.de</a>          |
|                ICQ#: 127823481              |
+-----------------------Oooo------------------+
                 oooO   (   )
                (   )    ) /
                 \ (    (_/
                  \_)

Guffa3-Sep-07 23:54

Guffa

3-Sep-07 23:54

So you want to run a method based on a string that is sent from the client? That's a pretty bad idea, as anyone can send any string to your server to run any method they like.

---
single minded; short sighted; long gone;

Stephan Pilz3-Sep-07 23:57

Stephan Pilz

3-Sep-07 23:57

You are right, but not exactly Smile | :)

Will make a self written AJAX-call with different parameters. Some parameters describes the call of the method. Please don't panic about the security. Is an internal website with different authorization mechanism.

Stephan

                   \\\|///
                 \\  - -  //
                  (  @ @  )
+---------------oOOo-(_)-oOOo-----------------+
| Stephan Pilz   stephan.pilz@stephan-pilz.de |
|                <a href=http://www.stephan-pilz.de>www.stephan-pilz.de</a>          |
|                ICQ#: 127823481              |
+-----------------------Oooo------------------+
                 oooO   (   )
                (   )    ) /
                 \ (    (_/
                  \_)

Salman Sheikh3-Sep-07 23:58

Salman Sheikh

3-Sep-07 23:58

Try

AssemblyContents and TypeContents to invke method from its name in string format

Salman Sheikh

Stephan Pilz4-Sep-07 0:03

Stephan Pilz

4-Sep-07 0:03

Thanks for the answer, but I can't find AssemblyContents or TypeContens (or so) in online help msdn.

Did you have more informations about that? Objects, Namespace, use of it, ... =

Stephan

                   \\\|///
                 \\  - -  //
                  (  @ @  )
+---------------oOOo-(_)-oOOo-----------------+
| Stephan Pilz   stephan.pilz@stephan-pilz.de |
|                <a href=http://www.stephan-pilz.de>www.stephan-pilz.de</a>          |
|                ICQ#: 127823481              |
+-----------------------Oooo------------------+
                 oooO   (   )
                (   )    ) /
                 \ (    (_/
                  \_)

Get blank CD/DVD disk space

Pascal Ganaye4-Sep-07 6:03

Pascal Ganaye

4-Sep-07 6:03

I am not sure if it would help you but this evaluator allows calls to methods within functions from a string source.

http://www.codeproject.com/dotnet/eval3.asp[^]

helelark1233-Sep-07 21:37

helelark123

3-Sep-07 21:37

Hello,

I am trying to get Media (blank CD or DVD) disk space (650MB/700MB or 4.7 GB) in vb.net.
Please help

Thanks

Shay Noy

Dave Kreskowiak4-Sep-07 5:32

4-Sep-07 5:32

There's nothing in the Windows API that will tell you this. You'd have to use a third party library, like Nero's SDK, to get that kind of information. Sorry, I don't have any examples.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

helelark1234-Sep-07 19:14

helelark123

4-Sep-07 19:14

Thank you,

I try to use Nero and getting this information but with no success.
Someone can help.

Thanks

Shay Noy

Dave Kreskowiak5-Sep-07 2:02

5-Sep-07 2:02

You should have said that before.

Your best source of information is going to be a support board for the library that your using. I guarantee you that 99.9% of the people here have not used a CD Burning library.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007