to add controls dynamically to a panel

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Hi all,

I am adding a control dynamically to a panel depending on the requirement i.e
the same process can repeat and add the same controls again depending on the count(no of times to be added).
But the thing is am able to see only the last added control instead the space is taken when created for the previous controls. Am not able to see the other controls.
So how can i make each added control visible?
Thanks in advance.

Posted 9-May-12 6:32am

qwerty 2

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Sergey Alexandrovich Kryukov 9-May-12 14:14pm

You need to tag your application type or UI library, such as WPF or Forms.
--SA

3 solutions

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Sergey Alexandrovich Kryukov · Answer 1 · 2012-05-09T08:18:00

Solution 3

I usually advise a very general method of solving such problems. If you don't know how to put some control, create some layout, etc., try to do it using the designer first. Test the application to see the results. If this is what you want, locate the auto-generated code and learn how it works. You will need to use exact same techniques. Only don't use ugly naming of the variables and method designers usually use — such names violate (good) Microsoft naming conventions. Give everything semantically sensible names, without numeric characters and other "automated" dirt.

Good luck,

—SA

Posted 9-May-12 8:18am

Sergey Alexandrovich Kryukov

Updated 9-May-12 8:19am

v2

Comments

Sandeep Mewara 9-May-12 14:31pm

Good suggestion and way to learn. 5!

Sergey Alexandrovich Kryukov 9-May-12 14:32pm

Thank you, Sandeep.
It's tested on myself when I started to learn some things like that.
--SA

Sandeep Mewara 9-May-12 14:34pm

Add +1 to tested candidates. :)

Sergey Alexandrovich Kryukov 9-May-12 17:05pm

:-)

Dave Kreskowiak · Answer 2 · 2012-05-09T06:58:00

Solution 2

Without seeing the code you're using for creating these controls in a loop, we can only guess.

Chances are good you're not setting the Top and Left (alternatively the Location) properties of the controls, so they are all sitting on top of each other at 0,0, or, you are setting every control to the same location. In either case, you will only see the last control added.

You have to add an appropriate offset to the Top and/or Left properties of each control in order to move them off the last control that was added. Exactly what you do here is dependent on your requirements.

Posted 9-May-12 6:58am

Dave Kreskowiak

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qwerty 2 10-May-12 2:05am

But the space for each control is created but not visible. Only the last control added is visible.
There is no problem with the space i.e they are not sitting on top of each other as you thought.The space is created but not visible.

Dave Kreskowiak 10-May-12 8:18am

What did I say?? I said "Without seeing the code you're using for creating these controls", we have to GUESS at what you're problem is. I told you what the MOST COMMON MISTAKE is given the description you provided.

Sandeep Mewara · Answer 3 · 2012-05-09T06:45:00

If you were working on ASP.NET then the following answer would have applied. As such, it's of no use.

am able to see only the last added control instead the space is taken when created for the previous controls. Am not able to see the other controls.
So how can i make each added control visible
Add a line break after every panel to push the next one in a new line.

One of the ways to add it:

C#

myPanel.Controls.Add(new LiteralControl("<br />"));

UPDATE:
As Dave has already pointed out, for Winforms, you need to provide the Left & Top property of the control. Something like:

C#

TextBox tb1 = new TextBox();

// set up the left and top position (the same as changing the location in the IDE)
tb1.Left = 100;
tb1.Top = 100;

// put any default text if you want
tb1.Text = "Hello World!"

// add the newly created control to the form
this.Controls.Add(tb1);

to add controls dynamically to a panel

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