Question

In the code below, I have a List object. I want to iterate through each one and assign a value to one of the properties on each Item object. To get the value, I need to call an async method of a WCF service.

When the call to my WCF service completes, how do I take that data and assign it to the current instance (i) in itemsList? Is there a way to access i from my xxxCompleted event?

private void SomeMethod() {     List<Item> itemsList = GetItems();      foreach(Item i in itemsList)     {         MyClient client = new MyClient();       client.GetSomeValueCompleted += client_GetSomeValueCompleted;       client.GetSomeValueAsync(i.ID);     }  }     private void client_GetSomeValueCompleted(object sender, GetSomeValueEventArgs e) {   int id = e.Result;   //  how do I assign this ID to my itemsList object, i  ??? } 

Answer 1

You can pass the instance of MyClient class as the userstate on the async method call.

Take a look at this link

  private void SomeMethod() {        List itemsList = GetItems();        foreach(Item i in itemsList)        {               MyClient client = new MyClient();             client.GetSomeValueCompleted += client_GetSomeValueCompleted;             client.GetSomeValueAsync(i.ID, client);    }  }     private void client_GetSomeValueCompleted(object sender, GetSomeValueEventArgs e) {      int id = e.Result;       //  how do I assign this ID to my itemsList object, i  ???    (e.UserState as MyClient).ID = id; }