Re: DataGridView, changing active cell within events - Windows Forms Discussion Boards

Re: how are Page Up/Down key presses supposed to work in a multicolumn listbox control

sarithasj2-Mar-09 2:22

2-Mar-09 2:22

If my list box looks like the following wherein 1-10 are visible and 6-20 can be viewed only when scrolled to the right.

1 6 |11 16
2 7 |12 17
3 8 |13 18
4 9 |14 19
5 10 |15 20

If 1 is the currently selected item and I press page down twice, first 10 is selected and then 19 is selected in my list box.
Is that the correct behaviour?

Re: how are Page Up/Down key presses supposed to work in a multicolumn listbox control

ABitSmart2-Mar-09 2:34

ABitSmart

2-Mar-09 2:34

Looking at it select 10 first, I would think next should have been 20.

Designing Windows Forms

VikashGohil28-Feb-09 21:59

VikashGohil

28-Feb-09 21:59

Hello,

Since a long time i had this question.

I want to know how to design my windows application forms like the design of Windows Media Player.

As per my knowledge Windows Media Player is also a Windows application and hence there must be some way they would have designed such beautifull curves and buttons.

Does Anyone know or can give me some link for more information on this.

Any help would be of great help.

Thanks in advance.

Re: Designing Windows Forms

Eslam Afifi28-Feb-09 22:17

Eslam Afifi

28-Feb-09 22:17

WPF is great for cool UI.
Or if you want to use Windows Forms (the hard way), you'll use the System.Drawing.Graphics, System.Drawing.Region and System.Drawing.Drawing2D.GraphicsPath to build your custom controls.

Eslam Afifi

Re: Designing Windows Forms

VikashGohil2-Mar-09 5:34

VikashGohil

2-Mar-09 5:34

Thanks For your Reply.

Can you please give me an example or some link where i can find some examples,

I will try WPF.

Thanks Again.

Re: Designing Windows Forms

Eslam Afifi3-Mar-09 5:51

Eslam Afifi

3-Mar-09 5:51

You're welcome Smile | :)

I recommend these links for a start.
http://www.codeproject.com/KB/WPF/GuidedTourWPF_1.aspx[^]
http://www.codeproject.com/KB/WPF/BeginWPF1.aspx[^]

Eslam Afifi

DataGridView, changing active cell within events

Antonino Porcino28-Feb-09 1:03

Antonino Porcino

28-Feb-09 1:03

I have a DataGridView that triggers Parse, CellValidating and CellValueChanged events.

I need to change the active cell in response of one of these events. For example, if the value of the cell is "1" I need to go to the third columns of the grid, and things like that.

The problem is that apparently I can't change the active cell while I'm still in the event. If I do that, strange things happen, ranging from no effects to events calling themselves resulting in stack overflow.

I managed to solve it with a dirty trick, but I am not satisfied yet. What is the correct way changing the active cell within an event?

Re: DataGridView, changing active cell within events

Calin Tatar28-Feb-09 7:23

Calin Tatar

28-Feb-09 7:23

Have you tried to change the active cell from CellValidated event handler?

Calin

connect to mysql

Any_India27-Feb-09 2:13

Any_India

27-Feb-09 2:13

can anyone able to help me...
i want to connect my vb.net desktop application to mysql which is in other LAN connected PC which operating system in linux(Red hat).
can anyone able tell me about connection string to connect my mysql(linux)database

Re: connect to mysql

Eddy Vluggen27-Feb-09 2:26

Eddy Vluggen

27-Feb-09 2:26

Yes[^]

I are troll Smile | :)

Re: connect to mysql

Any_India27-Feb-09 19:13

Any_India

27-Feb-09 19:13

Thank u

Re: connect to mysql

ky_rerun28-Feb-09 16:21

ky_rerun

28-Feb-09 16:21

Are you using the mysql data provider for .net or odbc

a programmer traped in a thugs body

RE: windows service

chandhuBTS27-Feb-09 1:36

chandhuBTS

27-Feb-09 1:36

I am writing a Windows Service that I may have to install more than one instance of per computer. Is there a way to change the DisplayName property and default install location using user provided information in ServiceInstaller project during install time?

Chandhu

Re: RE: windows service

led mike27-Feb-09 4:25

led mike

27-Feb-09 4:25

chandhuBTS wrote:
I am writing a Windows Service that I may have to install more than one instance of per computer. Is there a way to change the DisplayName property and default install location using user provided information in ServiceInstaller project during install time?

If the ServiceInstaller produces an MSI (Windows Installer) then it is very likely the MSI can be changed. Using Visual Studio to do that may not be possible, it may require using a different tool.

The most likely observation about your scenario is that you are wrong about needing to install the service module more than once on single computer. I highly recommend that you double check your analysis and conclusion regarding that issue.

Re: RE: windows service

Calin Tatar27-Feb-09 10:11

Calin Tatar

27-Feb-09 10:11

There is an MSI editor, called Orca. http://msdn.microsoft.com/en-us/library/aa370557.aspx[^]

Calin

Re: RE: windows service

led mike27-Feb-09 10:42

led mike

27-Feb-09 10:42

Calin Tatar wrote:
There is an MSI editor, called Orca.

Did you mean to tell the original poster that? I first used Orca about 5 years ago. Wink | ;)

However given the OPs apparent lack of experience with MSI databases I did not consider working with the raw tables a viable choice for them. I certainly could be wrong about that. Beer | [beer]

Re: RE: windows service

Calin Tatar27-Feb-09 11:39

Calin Tatar

27-Feb-09 11:39

Yes, I said about Orca because you specified about using a different tool. If the original poster will choose to change the installer, as you told him, he will know what tool to use.

Calin

FileDialog.AddExtension property doesn't work

sarithasj26-Feb-09 0:55

sarithasj

26-Feb-09 0:55

I have the SaveFileDialog set up to save .txt files. When I try to save a file with a different extension .jpg. It goes ahead and saves it in .jpg format. AddExtension does not append the .txt extension to the file name.

Please help.

Re: FileDialog.AddExtension property doesn't work

Alan N26-Feb-09 1:21

Alan N

26-Feb-09 1:21

Hi,
It's actually doing what it is supposed to do. The extension is only added if one is not present.

e.g.

myfile -> myfile.txt
myfile.txt -> myfile.txt
myfile.jpg -> myfile.jpg

Alan

Re: FileDialog.AddExtension property doesn't work

sarithasj26-Feb-09 2:14

sarithasj

26-Feb-09 2:14

Shouldn't the extension added to the file depend on the currently selected file filter. The filter in this case is .txt.

Re: FileDialog.AddExtension property doesn't work

Luc Pattyn26-Feb-09 3:20

Luc Pattyn

26-Feb-09 3:20

sarithasj wrote:
Shouldn't the extension added to the file depend on the currently selected file filter. The filter in this case is .txt.

Shouldn't you be checking what the documentation says about it?

as in "Gets or sets a value indicating whether a file dialog automatically adds an extension to a filename if the user omits an extension."

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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Problem while drawing the image in picture box

avinashpatil348426-Feb-09 0:32

avinashpatil3484

26-Feb-09 0:32

Hello Friends
i need help, i m using picture box for drawing the graph. so for that i m using paint event of picture box to draw an image. but problem is that when i minimize the window or any other window come on top then the image gets lost.
So wht should i do so that i can get my image afain after maximizng the window
And one more thing that is it possible to store the picture box image in any other object.

Thanking You All !

Avinash Patil

Re: Problem while drawing the image in picture box

Alan N26-Feb-09 1:32

Alan N

26-Feb-09 1:32

Hi,
Typically the PictureBox is used to display graphics from a bitmap, metafile, icon, JPEG, GIF, or PNG file. I think you need a graphing control. You may want to look into http://www.codeproject.com/KB/graphics/zedgraph.aspx[^] which I've seen recommended on this forum previously.

Alan.

Re: Problem while drawing the image in picture box

Thomas Stockwell5-Mar-09 8:02

Thomas Stockwell

5-Mar-09 8:02

Whenever an event occurs that may disrupt the graphics of the picturebox, be sure to call picturebox1.Invalidate(). This will for the picture to repaint itself. If you are doing custom paint routines it is usually recommended that you create a new custom user control.

Regards,
Thomas Stockwell

Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

Visit my Blog

Re: Problem while drawing the image in picture box

avinashpatil34845-Mar-09 18:10

avinashpatil3484

5-Mar-09 18:10

Hello Thomas
Thanks for replyng
Actually problem is that, i want to store the image of picture box in a object so that when it gets repainted because of minimization of picture box or any other window comes above it. So that it will reduce the time to redraw it. And one more thing to tell that while drawing in the picture box, there are near about 400000 points. and because of that its taking so much time.

Regards

Avinash Patil
avinashpatil3484@gmail.com

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