event-handling

I am using WPF and C# I have a button that opens a window, which also includes a button that adds an User object item to a listbox and I want the listbox index to be updated after insertion. I understood that the solution is about using observable class of INotifyCollectionChanged but actually I dont know how and where to use them. Can you help me on determining what and where to implement, register, fire etc. Edit: I succeeded this by Quartermeister's help where my User object is collected in a list, but now I want to do the same thing where my object is collected in a dictionary The easiest

I have a very strange Problem with dynamic created Buttons in VB.NET: The Click Event is not fired when creating them in a Loop. Here is my code: Panel1.Controls.Clear() For i As Integer = 0 To 100 Step 1 Dim b15 As new Button b15.Text = "Test3" b15.id = "a" & i AddHandler b15.Click, AddressOf updateFunc Panel1.Controls.Add(b15) Next This one doesn't work (only the PageLoad is fired, not the Click Event), but when i type Dim b14 As New Button b14.Text = "Test" b14.id = "asdf" AddHandler b14.Click, AddressOf updateFunc Panel1.Controls.Add(b14) it works fine and the Event is fired. The Header of

I'm trying to create a media player (with Media.MediaPlayer() class) and for this I am using a thread to process the songs that are loaded by the user using the OpenFileDialog. I am using the next code to start the process the songs: public static List<MediaFile> MediaList = new List<MediaFile>(); public static Queue<String> MediaFilesQueue = new Queue<String>(); public static void AddMediaFilesToMediaList() { String pathToFile; while (MediaFilesQueue.Count > 0) // all the files are loaded into the Queue before processing { pathToFile = MediaFilesQueue.Dequeue(); MediaData.MediaList.Add(new

I have my app with my labels written to centralize when its text was modified. To make that I invoke a method through an EventHandler. I want to use same method to each one of my labels, but I don´t know how to identify in the method which label invoke it. If I have a code like this: lbl_TextChanged(object sender, EventArgs e) { ..code.. label1.Location = new Point("label's location"); ..more code.. } and I invoke again that method from another label, how could I modify that code in order to know which label invoke it? SOLUTION Thanks for the help, This is the first time I tried to make

I have an event handler, i would like to pass some parameters to the event like this, that line trigger an error: method name expected p.Click += new System.EventHandler(P_Click(sender, new MyEventArgs { design = reader1["desig_prd"].ToString(), prix = (float)reader1["prix_prd"] })); my P_Click event public void P_Click(Object sender, EventArgs e) { var args = (MyEventArgs)e; string deignation = args.design; MessageBox.Show(deignation); } and i have class MyEventArgs like this class MyEventArgs : EventArgs { public string design { get; set; } public float prix { get; set; } } Any help? Thanks