Using InvokeMember

[Negative0]

I am trying to use InvokeMember to call a function from some code I am compiling on the fly. If I turn Option Strict off and just call the method, it works no problem, so I am guessing there is just something wrong with my InvokeMember call:

Dim oClass As Object
            Dim tType As Type
'cResult is an assembly that is compiled from the code that I load from a file
            oClass = cResult.CompiledAssembly.CreateInstance("clsScripting")
            tType = cResult.CompiledAssembly.GetType("clsScripting")
 
            Dim oArguments(1) As Object
            oArguments(0) = m_App
 
            'oClass.customcode(m_App)
            tType.InvokeMember("CustomCode", Reflection.BindingFlags.Default Or BindingFlags.InvokeMethod, Nothing, oClass, oArguments)

Here is the code it is compiling:

Class clsScripting
    Public Sub CustomCode(ByVal objWord As Object)
        objWord.Selection.TypeText("A")
    End Sub
End Class

Any help would be appreciated.

Thanks,

[The_Duck]

I usuall call InvokeMember with

x.GetType.InvokeMember(CustomMethod, Reflection.Bindings.InvokeMethod, x.GetType.DefaultBidner, x, New Object() {})

Give it a whirl

Good Luck

[Negative0]

Thanks for the advice Duck, but its not working. I can get it to call methods that have no arguments, however, when I try to use arguments, I get the error.

Anyone know what I am doing wrong?

[Edneeis]

Shouldn't this be:

Dim oArguments(0) As Object
            oArguments(0) = m_App

Also you didn't say what error you got?

[The_Duck]

Arguments can be passed at the end.

x.GetType.InvokeMember(CustomMethod, Reflection.Bindings.InvokeMethod, x.GetType.DefaultBidner, x, New Object() {YourObject1, YourObject2, YourObjectN})

Simply replace your objectN with the object you want to pass as a parameter to your method !

[Negative0]

Thanks Edneeis, that fixed it. Sometimes I forget that creating an array of size 1 actually creates an array of size 2.

[Edneeis]

What happened then was that it tried to find a method with that name and 2 arguments but couldn't find one (since the one you want only has 1 argument). That is how it handles Overloaded methods too, by matching the method name and argument count/types.

Glad it worked.