?
Solved

Dynamically Loading and calling a .net object

Posted on 2003-10-30
5
Medium Priority
?
378 Views
Last Modified: 2008-03-04
Is it possible to dynamically load then call a .net object. For instance, I have a exe and with this exe, I want to provide a folder that has a bunch of .net dlls with the same interface. I don't know the names of these dlls before the exe is compiled. I want to load all of the .net objects into memory and let the user select which ones to use.
0
Comment
Question by:skibud2
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 10

Assisted Solution

by:ptmcomp
ptmcomp earned 500 total points
ID: 9654174
Yes, I've also done this already.
Just use:
Type myType = Type.GetType("Full.Class.Name, AssemblyName");
Activator.CreateInstance(myType);
((IMyInterface)myType).MyMethod();
0
 

Author Comment

by:skibud2
ID: 9654682
doesn't that assume that it is already loaded in the GAC? I am trying to load it from the dll.
0
 
LVL 6

Accepted Solution

by:
etmendz earned 500 total points
ID: 9654996
Interesting project. ptmcomp's suggestion is close. You can read about the following and decide on what serves your purpose best:

Assembly.Load()
Assembly.LoadFrom()
Activator.CreateInstance()
Activator.CreateInstanceFrom()
Activator.CreateComInstanceFrom()

Have fun...
0
 

Author Comment

by:skibud2
ID: 9655198
I split it 125/125 because you both gave answers that helped me. Thanks guys!

-Mike
0
 
LVL 10

Expert Comment

by:ptmcomp
ID: 9656129
That's the code I used:
                  foreach (string typeName in typeNames)
                  {
                        Type type;
                        object dataSource;

                        type = Type.GetType(typeName);
                        if (type == null)
                        {
                              throw new ApplicationException(string.Format("Cannot load type '{0}'", typeName));
                        }
                        dataSource = Activator.CreateInstance(type);
                  }

This way there is no need to call Assembly.Load()
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
This tutorial will teach you the special effect of super speed similar to the fictional character Wally West aka "The Flash" After Shake : http://www.videocopilot.net/presets/after_shake/ All lightning effects with instructions : http://www.mediaf…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses
Course of the Month13 days, 12 hours left to enroll

801 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