DLL Classes and running functions

Posted on 2006-11-01
Medium Priority
Last Modified: 2010-04-16
Hi ,

Currently is use the Assembly.LoadFile function to load the DLL. This works :)
Then i use the SampleAssembly.GetTypes in a foreach loop to find the class i want. This works :)

Then i use the following to load the class:
    object oClass = Activator.CreateInstance(oClassType);

My question is, Without knowing the class structure of the DLL Class, how can i call a function inside that class?

Question by:cossy74
LVL 12

Expert Comment

ID: 17855253

under the section
"Obtaining Member Information from a Class"
LVL 11

Expert Comment

by:Mihai Stancescu
ID: 17856198
If its a COM dll and you know its class reference you can call for example:

[DllImport("GDI32.DLL", EntryPoint = "CreateRectRgn")]
        private static extern int CreateRectRgn(int x1, int y1, int x2, int y2);

If its a .Net assembly just put in your using clause the name of the namespace registered in the assembly.

LVL 14

Accepted Solution

existenz2 earned 2000 total points
ID: 17857001
You can do that this way:

Type type = typeof(<Object>);
object oClass = Activator.CreateInstance(type);
object[] arguments = new object[0];
object retVal = type.InvokeMember("<Method>",BindingFlags.Default | BindingFlags.InvokeMethod,null,oClass,arguments);

Replace <Object> and <Method> with the correct values.

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

This article describes a simple method to resize a control at runtime.  It includes ready-to-use source code and a complete sample demonstration application.  We'll also talk about C# Extension Methods. Introduction In one of my applications…
This article is for Object-Oriented Programming (OOP) beginners. An Interface contains declarations of events, indexers, methods and/or properties. Any class which implements the Interface should provide the concrete implementation for each Inter…
In response to a need for security and privacy, and to continue fostering an environment members can turn to for support, solutions, and education, Experts Exchange has created anonymous question capabilities. This new feature is available to our Pr…
In this video I will demonstrate how to set up Nine, which I now consider the best alternative email app to Touchdown.
Suggested Courses

588 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question