Good morning,

I am trying to call a method from a DLL being created at runtime. I am using the LoadFrom and InvokeMember members of the reflection class. Can someone please tell me why the method is not being found. I am including the code from the DLL, the invoke member, and the error message I am receiving.

Thanks in advance.

Eric

ERROR MESSAGE
Method subLic.reg.fName not found.
at System.RuntimeType.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParameters)
at System.Type.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args)
at subrep.WebForm1.Page_Load(Object sender, EventArgs e) in D:\test\temp.aspx.vb:line 40 (The invokeMember line)

CODE CREATING THE DLL:
        Public Shared Sub createSubLic()
            Dim sb As New System.Text.StringBuilder
            Dim provider As Microsoft.VisualBasic.VBCodeProvider
            Dim compiler As System.CodeDom.Compiler.ICodeCompiler
            Dim cp As System.CodeDom.Compiler.CompilerParameters
            Dim results As System.CodeDom.Compiler.CompilerResults

            With sb
                .Append("Namespace subLic")
                .Append(vbCrLf)
                .Append(" Public Class reg")
                .Append(vbCrLf)
                .Append(" Public Shared Function fName()")
                .Append(vbCrLf)
                .Append(" return ""Test""")
                .Append(vbCrLf)
                .Append(" End Function")
                .Append(vbCrLf)
                .Append(" End Class")
                .Append(vbCrLf)
                .Append("End Namespace")
            End With
            cp = New System.CodeDom.Compiler.CompilerParameters
            cp.ReferencedAssemblies.Add("System.dll")
            cp.ReferencedAssemblies.Add("System.Web.dll")
            cp.GenerateExecutable = False
            cp.GenerateInMemory = True
            cp.OutputAssembly = "D:\test\bin\subLic.dll"
            Try
                provider = New Microsoft.VisualBasic.VBCodeProvider
                compiler = provider.CreateCompiler
                results = compiler.CompileAssemblyFromSource(cp, sb.ToString)
                If results.Errors.Count > 0 Then
                    Dim i As Integer
                    For i = 0 To results.Output.Count - 1
                        sStatus += results.Output(i) & vbCrLf
                    Next i
                    For i = 0 To results.Errors.Count - 1
                        sStatus += ((i.ToString() + ": " + results.Errors(i).ToString())) & vbCrLf
                    Next i
                End If

                sStatus += sb.ToString

            Catch ex As Exception
                sStatus = ex.Message
            End Try
        End Sub
    End Class

CODE CALLING THE DLL:
        Dim result As Object
        Try
            Dim asm As [Assembly] = [Assembly].LoadFrom("D:\test\bin\subLic.dll")
            Dim t As Type = asm.GetTypes()(0)
            Dim o As Object = asm.CreateInstance(t.FullName)
            result = t.InvokeMember("fName", BindingFlags.Default Or BindingFlags.InvokeMethod Or BindingFlags.Instance, Nothing, o, Nothing)
            If Not result Is Nothing Then
                 txt2.Text = CType(result, String)
            End If
        Catch ex As Exception
            txt2.Text += ex.Message & vbCrLf & ex.StackTrace
        End Try



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Have you tried iterating through all members to check that the member you're calling exists?