How to add dynamic a user control to panel thought name in winfoms?

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i am made a project (windows form, vb.net)
My mean is how to add dynamic a user control to panel by name of user control.
I had made with form by below:

VB

Dim a As Assembly = Assembly.GetEntryAssembly()
           Dim t As System.Type = a.[GetType](formName)
           Dim o As Object = System.Activator.CreateInstance(t, True)
           Dim frm As Form = DirectCast(o, Form)

frm.show()

but I can't with user control

VB

Dim a As Assembly = Assembly.GetEntryAssembly()
Dim t As System.Type = a.[GetType](controlName)                        ' -->nothing
          Dim o As Object = System.Activator.CreateInstance(t, True)
          Dim ctlAs System.Windows.Forms.UserControl= DirectCast(o, System.Windows.Forms.UserControl)</pre>
pnHolder.control.add(ctl)

Can You help me, Plz?

Posted 7-Aug-14 17:15pm

binhminhtrencat

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Tino Fourie · Answer 1 · 2014-08-11T09:39:00

Not sure if this is the problem, assuming you are using VB.Net (and not C# as the Tag says).

VB

pnHolder.control.add(ctl)

It should read:

pnHolder.controls.add(ctl)

You should also declare your user control before you can use it in your code. For example, I have a UserControl Class called _clUserControl. In the form where you wish to add the UserControl to the Panel control, you have to declare the UserControl first, e.g.:

VB

Private clUserControl As New _clUserCOntrol 'Declare the User Control

In your code where you wish to add the control to the Panel Control, simply add the the control:

VB

myPanel.Controls.Add(clUserControl)