C# Discussion Boards - CodeProject

Re: create an application which generate table of the entered number..

PIEBALDconsult27-Jan-12 16:11

27-Jan-12 16:11

It was a math class, he simply had to produce and use a table with some numbers in it to get some values to answer a few questions. The table was only an aid to answering the questions, not the answer itself. He didn't need to code, but I had hoped that he might see how having such a useful skill could benefit him.

URL change

salim_ali24-Jan-12 21:40

salim_ali

24-Jan-12 21:40

I am a beginner in asp. I have a link like some thing like this http://www.mysite.com/default1.asp?id="9" . I need to change this url into like this href="http://www.mysite.com/ar/default1.asp?id="9" on a clicking a button. Means on clicking this button it will get change the url "/ar/" and the next click it will remove "/ar/" . Please some one help me to do this.

Re: URL change

Richard Andrew x6425-Jan-12 3:11

Richard Andrew x64

25-Jan-12 3:11

You might get better responses if you post this in the ASP.NET forum.

The difficult we do right away...
...the impossible takes slightly longer.

c# how to find one Outlooktask with UserProperty

Easygoing24-Jan-12 21:27

Easygoing

24-Jan-12 21:27

Hi,

i need to find a "Outlook Task" with a special UserProperty like "id". I know how to find a contact with this property, but this doesn't work with a task.

Contactitem:

Outlook.ContactItem contact = (Outlook.ContactItem)contactItems.Find(String.Format("[Email1Address]='{0}' and " + "[User3]='{1}'", mail_s, master_s));

I need Help please! Thank's a lot
regards
ww

Can't change a button't text at runtime anymore??????

fiaolle24-Jan-12 9:28

fiaolle

24-Jan-12 9:28

Hi
When I could change the text at runtime, I think the property was called Capture.
How do you do in Visual Studio 2010?
If I set the button btn's property Text to "By" and try the below

btn.Text="Hi"

nothing happens.
How do I do it nowadays Confused | :confused:

Many Thanks
Fia

Re: Can't change a button't text at runtime anymore??????

fjdiewornncalwe24-Jan-12 9:56

fjdiewornncalwe

24-Jan-12 9:56

What do you mean, "Nothing Happens".
If "btn" is a control on your form or webpage(depending on your solution type), then this will change the text shown on the button.
I think that you have not given us a clear picture of your issue. Could you describe it a little more?

I wasn't, now I am, then I won't be anymore.

Re: Can't change a button't text at runtime anymore??????

fiaolle24-Jan-12 20:29

fiaolle

24-Jan-12 20:29

Hi again

What I mean with "nothing happens" is that the button btn's text is still By.Even if the bool folder's property Visible is changed to true. I have tried

I have the code in the buttons click event.

private void btn_Click(object sender, EventArgs e)
{
        if (folder.Visible==true )
        {
           btn.Text = "Hi"; 
         }         
         else
         {
            btn.Text = "By";
         }
               
}

I have tried btn.Invalidate(); and Form1.Invalidate(); it didn't help. And I also tried with Refresh() and Update() on both btn and Form1.

Dear KP Lee

I don't understand how to or what you mean I should do
"I fixed that by assigning a delegate in the winapp, running the calculations on another thread and calling the delegate."

Many Thanks
Fia

Re: Can't change a button't text at runtime anymore??????

lukeer24-Jan-12 21:15

lukeer

24-Jan-12 21:15

I'd try to change the condition to

if (btn.Text == "By")

just to try if the Text change works.

If it does, you should investigate how folder.Visible is connected to your button text.

Ciao,

luker

Re: Can't change a button't text at runtime anymore??????

OriginalGriff24-Jan-12 22:21

OriginalGriff

24-Jan-12 22:21

The other thing to check is that the click event is hooked to the event handler: put a breakpoint on the first line to make sure it is being executed, and then single step through.

Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

Re: Can't change a button't text at runtime anymore??????

fiaolle24-Jan-12 22:42

fiaolle

24-Jan-12 22:42

Hi Thanks for your answers.

I have already stepped through the code and it's running as it should, but the button's Text still doesn't change.

I don't understand what to do????.

Many Thanks
Fia

Re: Can't change a button't text at runtime anymore??????

OriginalGriff24-Jan-12 22:55

OriginalGriff

24-Jan-12 22:55

OK: I took an existing form, and dropped a button on it.
I double clicked the button and in the handler method that came up:

private void button1_Click(object sender, EventArgs e)
    {
    button1.Text = button1.Text == "Hello" ? "Goodbye" : "Hello";
    }

When I ran the app, the button caption was "button1".
When I pressed it the first time, it changed to "Goodbye"
A second click, it became "Hello".
Third click, back to "Goodbye", and round and round.

What am I doing that is different to you, or you doing that is different to me?

Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

Re: Can't change a button't text at runtime anymore??????

fiaolle24-Jan-12 23:35

fiaolle

24-Jan-12 23:35

Hi I can't see any difference.

Here is my code.

private void btn_Click(object sender, EventArgs e)
{
        if (folder.Visible==true )
        {
           btn.Text = "Hi"; 
         }         
         else
         {
            btn.Text = "By";
         }
}

The variable folder is just a bool variable. When I debug my code I can see that it runs as it should, but still the button's Text doesn't change.
I don't know if it has anything to do with the problem, but I have a FileLListbox and a FolderListBox from Alva on the form. Should that be the problem.

Many Thanks
Fia

Re: Can't change a button't text at runtime anymore??????

OriginalGriff24-Jan-12 23:37

OriginalGriff

24-Jan-12 23:37

Try something quick: Put a breakpoint on the if line of the handler, and change teh button text in the designer to "TEST".
Run your app, and press the button. Look at btn.Text in the debugger - is it "TEST"?

Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

Re: Can't change a button't text at runtime anymore??????

fiaolle25-Jan-12 0:05

fiaolle

25-Jan-12 0:05

Hi
I tried that and the text is "Test". I tried also to remove all Alva controls, but I still can't change the text on the button. Frown | :(

Thanks
Fia

Re: Can't change a button't text at runtime anymore??????

OriginalGriff25-Jan-12 0:19

OriginalGriff

25-Jan-12 0:19

So at least we can be absolutely sure that the right button is hooked up - if you replace the handler content with

btn.Text = "WTF!";

and single step over that one instruction, is the text still "Test" or "WTF!" - I'm just wondering if the text is being changed back somewhere else (which would be a weird thing to do automatically)

Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

Re: Can't change a button't text at runtime anymore??????

fiaolle25-Jan-12 0:28

fiaolle

25-Jan-12 0:28

Hi
It changes to "WTF" in the code, but after the event. The buttons text is "Test"?????

Thanks
Fia

Re: Can't change a button't text at runtime anymore??????

OriginalGriff25-Jan-12 0:32

OriginalGriff

25-Jan-12 0:32

Something has got to be changing it back!

Delete it.
Rebuild.
That should give you any errors that refer to it.
If there aren't any, put it back and repeat the above, see if it works.

Either that or you have a PC full of malevolent pixies... Laugh | :laugh:

Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

Re: Can't change a button't text at runtime anymore??????

Pete O'Hanlon25-Jan-12 3:41

Pete O'Hanlon

25-Jan-12 3:41

Put a breakpoint in your code in this routine. Search through your code for all instances of the word Test and put breakpoints on them all - each and everyone. Run the program again and note each breakpoint you hit - you must be resetting the text back to Test after you have left this routine.

Forgive your enemies - it messes with their heads

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: Can't change a button't text at runtime anymore??????

KP Lee24-Jan-12 12:02

KP Lee

24-Jan-12 12:02

Trying that statement shouldn't even compile. Assuming you didn't complete the statement you really used (with a semi-colon,) this will normally cause the button to refresh and show "Hi" (Without quotes) like your other responder said.

You can try to force a refresh with an .Invalidate

Once, I tried to execute complex logic and print intermediate results by modifying text boxes' .Text property. Wanted to know why that wasn't working. Your winapp has to be idle and waiting for a response before it will render the changes.

I fixed that by assigning a delegate in the winapp, running the calculations on another thread and calling the delegate.

Re: Can't change a button't text at runtime anymore??????

OOPSEP25-Jan-12 1:15

OOPSEP

25-Jan-12 1:15

private void btn_Click(object sender, EventArgs e)
{
        if (folder.Visible==true )
        {
           btn.Text = "Hi";
         }
         else
         {
            btn.Text = "By";
         }

}

Make sure your property folder.Visible is change when click state
btn.Text = folder.Visible?"Hi":By;
folder.Visible=!folder.Visible; // reset state here

Re: Can't change a button't text at runtime anymore??????

fiaolle25-Jan-12 2:30

fiaolle

25-Jan-12 2:30

Hi I am changing the folder to visible or not visible. But nothing is helping me.

Thanks
Fia

Re: Can't change a button't text at runtime anymore??????

BillWoodruff25-Jan-12 3:41

BillWoodruff

25-Jan-12 3:41

Given all the responses above, clearly something very weird is happening here.

Are you talking about a standard WinForms Button object here ?

Also: what is "folder," exactly: that's an odd name for a Control. And, if "folder" has a boolean "visible" property, you can use it directly : if (folder.Visible) ...

You mention: "I don't know if it has anything to do with the problem, but I have a FileLListbox and a FolderListBox from Alva on the form. Should that be the problem."

Is "folder" by chance an "Alva" control ?

What are the "Alva" controls, and, is it possible your use of them has introduced some kind of modification that is indirectly changing the way other controls behave ?

good luck, Bill

"Science is facts; just as houses are made of stones: so, is science made of facts. But, a pile of stones is not a house, and a collection of facts is not, necessarily, science." Henri Poincare

Re: Can't change a button't text at runtime anymore??????

fiaolle25-Jan-12 4:17

fiaolle

25-Jan-12 4:17

Hi Thanks for all your replies. I have found my error.
I used InitializeComponent(); both in the constructor Form1() and in
Form1_Load(object sender, EventArgs e)

I am so sorry for my misstake, but know it's working as it should Big Grin | :-D

Many thanks
Fia

Learning C# custom controls

thechazm24-Jan-12 5:53

thechazm

24-Jan-12 5:53

Does anyone have a good reference to a site or a book that focus's on custom controls? I have watched all the youtube videos. Also I completed the training at learnvisualstudio's website.

Thanks,
TheChazm

modified 24-Jan-12 15:11pm.

Re: Learning C# custom controls

fjdiewornncalwe24-Jan-12 9:11

fjdiewornncalwe

24-Jan-12 9:11

C# Custom Control Featuring a Collapsible Panel[^]. A good example.
User Control articles on CP[^]
Custom Control articles on CP[^]
Walkthrough: Authoring a Composite Control with Visual C#[^]. If you want a different dotNet version, just pick it from the "Other Versions" link just under the title in the article.
C# Tutorial: A gauge control with all source code, .net 2.0[^] This is a good tutorial, but is only for dotNet 2.0.

I wasn't, now I am, then I won't be anymore.

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