Add Item to UserControl1

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VS2012

How can I add my object (for example button1) to UserControl1?

I used below code but doesn't work:

VB

Dim btn as Button
btn = new Button
UserControl1.Controls.Add (btn)

Posted 9-Dec-13 4:22am

Sh.H.

Updated 9-Dec-13 4:25am

Aescleal

v2

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Sh.H. 9-Dec-13 10:30am

Any answer please????? :(

Sergey Alexandrovich Kryukov 9-Dec-13 10:54am

Answer to what? What "does not work", exactly?
—SA

Sh.H. 9-Dec-13 11:26am

I mean if you copy/paste this code to project, it gives me error.

phil.o 9-Dec-13 10:34am

Maybe try to give your button at least a minimum size and a discrimining text?

Sh.H. 9-Dec-13 10:41am

What do you mean Phil.o ?

phil.o 9-Dec-13 10:44am

I mean a button, like any other control, needs a size to be initialized, and also needs a text inside it to be shown.
Since you're instantiating your button programmatically, you have to set its Size and Text properties, which you do not do as far as we could see. Otherwise your button is just a control with zero-size and no text => you won't be able to see anything.

Sh.H. 9-Dec-13 11:22am

I don't understand you!
Could you please do a favor and write for me a sample code?
thanks

phil.o 9-Dec-13 11:52am

Just drag the button control from the toolbox on your usercontrol; it will appear.

Sh.H. 9-Dec-13 15:50pm

Yes... But I need to create and put it via code.
Could you please let me know its code?

Sergey Alexandrovich Kryukov 9-Dec-13 10:53am

When you say "Button", "UserControl", the question is: which one? Full type name, please.
—SA

Sh.H. 9-Dec-13 11:24am

What I mean "UserControl" which is you add to your project.
Right click on Project Name from Solution Explorer, then add new item, then select "User Control"

Alright, now it adds to your project.
What I want is put a Button on it.
How??????

Thanks.

Sergey Alexandrovich Kryukov 9-Dec-13 11:41am

You did not even answer my question. Which "Button" class? Which "UserControl". What is the problem?
What is UserControl1?! If this is the code of your user control, it should be the instance, "self"...
—SA

Sh.H. 9-Dec-13 15:52pm

Button1
UserControl1

I explained very clear. Please read my question again.

Sergey Alexandrovich Kryukov 9-Dec-13 15:57pm

No, you did not explain anything, you did not even tell us the type name. Probably you thing that there is only one type "Button" in whole .NET FCL, but this is not true.
In want context is it written:
"UserControl1.Controls.Add (btn)"?
If this is in the user control code, it should be "self", if not, btn should be inaccessible. Do you understand where is the type and where is the instance.
So far, I have an impression that you are not yet ready to do the development, especially UI. No problem, you can fix it.
—SA

Sh.H. 9-Dec-13 16:05pm

Look, let's explain step by step what I did:
1. open visual studio and make new project
2. Add a control user. Right click on project name in solution window, Add>Add User Control. New user control creates and its default name is UserControl1.
3. Now what I need is add a button on the UserControl1.
If I drag and drop a button from toolbox to user control, it works successfuly. But what I want is adding this via code, not via drag and drop.
Is it a clear explaination???

Sergey Alexandrovich Kryukov 9-Dec-13 16:14pm

First, why? It would be a misuse of the control.

Second: you need to create a function in the user control; in its body, you can write:
newButton.Parent = self;
or:
Controls.Add(newButton);
The parameter of this function could be Button.
And make this function friend (or public, if you need to access it from other assembly).

—SA

Sergey Alexandrovich Kryukov 9-Dec-13 16:15pm

Why do you say that Solution 1 is not what you want? Your comment above says that this is what you want.
—SA

Sh.H. 9-Dec-13 16:19pm

I don't know why you got confused.
Please do as I say:
1. open visual studio and make new project
2. Add a user control with this way: Right click on project name in solution window, Add>Add User Control.
3. Write a code to add a button on UserControl.
But remember that, write this code in Class Form1.

Sergey Alexandrovich Kryukov 9-Dec-13 17:58pm

Enough, this is hopeless. You are confused, not me. The problem does not cost a dime. You are not yet ready to do UI development.
—SA

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OriginalGriff · Answer 1 · 2013-12-09T05:48:00

Solution 1

The recommended way in not to do it from outside the UserControl, but to do it from inside the control instead.
So create a method which adds it:

VB

Public Sub New(text As String)
    Dim but As New Button()
    but.Text = text
    but.Location = New Point(10, 10)
    but.Click += New EventHandler(AddressOf button_Click)
    Controls.Add(but)
End Sub

Then just add the handler method itself:

VB

Protected Sub button_Click(sender As Object, e As EventArgs)
' Handler code here
End Sub

Posted 9-Dec-13 5:48am

OriginalGriff

Comments

Sh.H. 9-Dec-13 15:58pm

Thanks..... But it is not what I want.
Follow your code, the button adds on Form1, not on UserControl1

I added a UserControl from solution , right click on project name, add>User Control

I hope I explained clear ....

OriginalGriff 9-Dec-13 16:31pm

No, the method goes inside the UserControl, so the button is added to the control controls collection, not the form. The user control can't affect the form since it had no access to it (or even knows it is contained within a form, not another control)