Re: Problem with SelectedIndexChanged method - C# Discussion Boards

Re: Problem with SelectedIndexChanged method

Martin#9-Jul-07 21:55

9-Jul-07 21:55

Hello,

You are write!
Also the SelectedValueChanged has this behavior. It doesn't check for current setting! Frown | :(

Maybe the TextChanged helps you here. (I know that it could be multible text in the Items!)

All the best,

Martin

Re: Problem with SelectedIndexChanged method

Rajesh R Subramanian9-Jul-07 22:00

Rajesh R Subramanian

9-Jul-07 22:00

Martin# wrote:
Maybe the TextChanged helps you here.

No, that has the same behavior too.

Nobody can give you wiser advice than yourself. - Cicero

Re: Problem with SelectedIndexChanged method

Martin#9-Jul-07 22:02

Martin#

9-Jul-07 22:02

brahmma wrote:
No, that has the same behavior too.

Really?
I just tested it!
Selected same Item and event was not fired.

All the best,

Martin

Re: Problem with SelectedIndexChanged method

Rajesh R Subramanian9-Jul-07 22:08

Rajesh R Subramanian

9-Jul-07 22:08

Thanks for pointing it out. I had two projects open, and got confused between both. But I think I may run into trouble, because the combobox item text might be changed dynamically depending on a table updation in the database. Somehow, this problem is fixed for now. Thanks a bunch again.

Nobody can give you wiser advice than yourself. - Cicero

Re: Problem with SelectedIndexChanged method

Rajesh R Subramanian9-Jul-07 23:45

Rajesh R Subramanian

9-Jul-07 23:45

Martin# wrote:
I know that it could be multible text in the Items!

Exactly! What can I do in case I have multiple items with the same text in the ComboBox? Hmmm | :|

Nobody can give you wiser advice than yourself. - Cicero

Re: Problem with SelectedIndexChanged method

Martin#9-Jul-07 23:56

Martin#

9-Jul-07 23:56

Hello,

brahmma wrote:
What can I do in case I have multiple items with the same text in the ComboBox?

The question is what do you want it to do.

All the best,

Martin

Re: Problem with SelectedIndexChanged method

Rajesh R Subramanian10-Jul-07 0:00

Rajesh R Subramanian

10-Jul-07 0:00

Hmm... I want to execute a piece of code whenever the user changes his selection in a combobox. But the TextChanged handler may not work if I have duplicate items in the combobox. And the SelectedIndexChanged will be called even if the user selects the same item again, which sucks. So, do I need to check manually if the user has selected a different item every time and then execute my code? If yes, then why do we have event handlers?

Nobody can give you wiser advice than yourself. - Cicero

Re: Problem with SelectedIndexChanged method

Martin#10-Jul-07 0:19

Martin#

10-Jul-07 0:19

Hello,

brahmma wrote:
And the SelectedIndexChanged will be called even if the user selects the same item again, which sucks

So true!

brahmma wrote:
So, do I need to check manually if the user has selected a different item every time and then execute my code?

I think in your special case, yes!

brahmma wrote:
If yes, then why do we have event handlers?

I guess this statetment comes out of frustration.

An other possibility is, you do what MS was not willed todo:
inherit your own combobox, like this:

public class SpecialComboBox : System.Windows.Forms.ComboBox
{
    private bool init = true;
    private int oldIndex = 0;

    public SpecialComboBox()
    {
    }

    protected override void OnSelectedIndexChanged(EventArgs e)
    {
        if((oldIndex!=this.SelectedIndex)|| init)
        {
            init=false;
            oldIndex = SelectedIndex;

            base.OnSelectedIndexChanged (e);
        }
    }
}

This should do it!

All the best,

Martin

Re: Problem with SelectedIndexChanged method

Muhammad Gouda10-Jul-07 0:51

Muhammad Gouda

10-Jul-07 0:51

Very good idea to create your own control that enhances performance of the vendor. I will vote 5 for your message Martin.
My greetings Smile | :)

Mohamed Gouda
Egypt

Re: Problem with SelectedIndexChanged method

Martin#10-Jul-07 1:13

Martin#

10-Jul-07 1:13

Thank you!

All the best,

Martin

Re: Problem with SelectedIndexChanged method

Rajesh R Subramanian10-Jul-07 0:51

Rajesh R Subramanian

10-Jul-07 0:51

Imagine an ERP package under development with some 300 forms (to which I have access). There are 500+ combo boxes. Now, I have to inherit my own combobox and then... Thanks, Microsoft. Hmmm | :|

Nobody can give you wiser advice than yourself. - Cicero

Re: Problem with SelectedIndexChanged method [modified]

Martin#10-Jul-07 1:12

Martin#

10-Jul-07 1:12

brahmma wrote:
I have to inherit my own combobox and then

It's not good style but it works:
Change it directly in the .cs file (InitializeComponent code)
Replace in the editor "System.Windows.Forms.ComboBox" to "YoureNamespace.SpecialComboBox"!

-- modified at 7:20 Tuesday 10th July, 2007

All the best,

Martin

Detect child form client area even if maximized.

swjam9-Jul-07 21:31

swjam

9-Jul-07 21:31

Hello C# guru's,

I've done my research but I just couldn't find one that does the following.
I have an MDI application. In the child form there is a panel whose height is dependent on the
current client area height of the child form. The child form is set to a default size when created but its size can be adjusted afterwards and can also be maximized. If I set the currently active child window to maximized and then open another child window, the panel height of the latter is set based on the default height of the child form even though it opens maximized. How do I make the child form calculate its actual client area whether it's maximized or not?

TIA!

I am a SysAdmin, I battle my own daemons.

outlook progrmaing using c#

gihankoli9-Jul-07 21:27

gihankoli

9-Jul-07 21:27

Hey I’m developing a windows service (with C# .net 2005) to access the outlook 2003 calendar.

I’m running the service account as a Network Service
-------------------------------------------------------------------------------------------------
this.serviceProcessInstaller1.Account =
System.ServiceProcess.ServiceAccount.NetworkService;
----------------------------------------------------------------

Service is instlling properly. But when I strat the service error pope out saying unotheraized access at the point I create outlook object.

----------------------------------------------------------------
private Outlook.Application objOutlook = new Outlook.Application();
----------------------------------------------------------------

Error: An unhandled exceptoin (“System.UnathorizedAccessException”) occurred servicename.exe[2804]

Re: outlook programing using c#

originSH9-Jul-07 22:04

originSH

9-Jul-07 22:04

Well your trying to access something and it's saying your unauthorised. Now feel free to call me crazy but it sounds like your unauthorised to access outlook from that account :P

It might be that thats not the problem but the easiest way to test is to give the service your user account and test it again. If the problem goes away then the network service doesn't have the permissions needed.

Changing date format

pmartike9-Jul-07 21:12

pmartike

9-Jul-07 21:12

Hi!

I'm working with Microsoft SQL Database. Dead | X|

Anybody knows how to change date format form code:
Now it's MM/DD/YYYY but i want DD/MM/YYYY. Cry | :((

Thank you. Rose | [Rose]

--------------------------------
visit: http://pmartike.deviantart.com/

Re: Changing date format

Muhammad Gouda9-Jul-07 21:42

Muhammad Gouda

9-Jul-07 21:42

I am familier with MS Access rather than SQL
And to do that there, I choose my format in the database designe phase (Set the date field format to whatever you want). and do not need coding for this.
I think SQL Server provides same thing

Mohamed Gouda
Egypt

Re: Changing date format

Harini N K9-Jul-07 21:55

Harini N K

9-Jul-07 21:55

Hi
Use SET DATEFORMAT

See the example below:

<br />
Example 1 : executes without any error <br />
<br />
use northwind<br />
go<br />
<br />
set dateformat dmy<br />
go<br />
<br />
select top 10 * from Orders where requireddate >= '15-08-1996'<br />
<br />
Example 2 : gives error <br />
<br />
use northwind<br />
go<br />
<br />
set dateformat mdy<br />
go<br />
<br />
select top 10 * from Orders where requireddate >= '15-08-1996'