Using Value of String variable to call an instance in vb.net winform

Question

I have UserControl named for example 'aaa'

then i have variable:

Dim a as String = "aaa"

Now, i declare

Dim uc as UserControl = new aaa

my question is, can i write declaration above using value of variable a like below

Dim uc as UserControl = new a

Steven Doggart · Accepted Answer · 2012-11-12 16:31:35Z

1

You can do this using reflection (in the System.Reflection) namespace. For instance:

Dim t As Type = Assembly.GetExecutingAssembly().GetType("namespace.aaa")
Dim o As Object = Activator.CreateInstance(t)

Notice that you will need the full type name, including the namespace, so you may need to concatenate that to your string, for instance:

Dim namespace As String = "MyNamespace"
Dim t As Type = Assembly.GetExecutingAssembly().GetType(namespace & "." & a)
Dim o As Object = Activator.CreateInstance(t)

answered Nov 12, 2012 at 16:31

Steven Doggart

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