Event fires more and more times

Question

I have a silverlight mvvm application that loads main view with 2 user controls loaded into 2 ContentControls, one with listbox showing items and other with edit button. Whe

Answer 1

this.globalEvents.OnSaveButtonClicked += (s, e) => SaveData();

This line is being called multiple times so you are adding a new event handler every time.

You need to either move that line to somewhere where it's only called once or change the event handler to:

this.globalEvents.OnSaveButtonClicked += SaveData;

public void SaveData(object sender, EventArgs e)  
{  
    globalEvents.RaiseSaveData(EditedGuy);     
    this.globalEvents.OnSaveButtonClicked -= SaveData();
}

So you remove the event handler after dealing with it. This assumes that the handler will be added back next time you go into edit mode.