Im having trouble with WCF Async service methods. I think this is a lack of understanding on my part, but I cant find anything that applies to my situation.
In short I would like to call a method and then perform work after getting the value.
To simplify my situation imagine this:
Form with two buttons and two listboxes.
Click button 1, and it calls the WCF and populates list 1;
Click button 2, and it calls the WCF and populates list 2;
In a typical situation, I would do this:
[code]
button1_handler
{
listBox1.ItemsSource = dal.GetList("button1");
}
button2_handler
{
listBox1.ItemsSource = dal.GetList("button2");
}
[/code]
the issue is this, in the Asnyc world I cant do that sicne the Async methods do not have return types but use callbacks.
[code]
dal.GetListComplete += (object sender, GetListEventArgs e) =>
{
// here I must pick list one or two -- with no easy way
// to know which button was clicked,
listBox1.ItemsSource = e.Result;
};
//populate list of all Client OUs
dal.GetList("button1");
[/code]
I have the same issue even if I do not use an anonymous method for the event handler.
If I use the (sender) object, it seems very wasteful to make a large switch statement in the completed event handler to determin what list I should populate.
Any thoughts or ideas are really appreciated!