How to create an asynchronous method

Question

I have simple method in my C# app, it picks file from FTP server and parses it and stores the data in DB. I want it to be asynchronous, so that user perform other operations

Answer 1

You need to use delegates and the BeginInvoke method that they contain to run another method asynchronously. A the end of the method being run by the delegate, you can notify the user. For example:

class MyClass
{
    private delegate void SomeFunctionDelegate(int param1, bool param2);
    private SomeFunctionDelegate sfd;

    public MyClass()
    {
        sfd = new SomeFunctionDelegate(this.SomeFunction);
    }

    private void SomeFunction(int param1, bool param2)
    {
        // Do stuff

        // Notify user
    }

    public void GetData()
    {
        // Do stuff

        sfd.BeginInvoke(34, true, null, null);
    }
}

Read up at http://msdn.microsoft.com/en-us/library/2e08f6yc.aspx