Question

If I have a databound form, how do I know if a user has modified it (either by typing text into a text box, or by selecting an item in a combobox)? I’ve tried hooking into my textbox’s ‘TextChanged’ event, but the problem is that, when my form participates in databinding, the ‘TextChanged’ event fires, prematurely marking my form as ‘dirty.’

Answer 1

try implementing

public partial class Window1 : INotifyPropertyChanged 

and then

public event PropertyChangedEventHandler PropertyChanged;  public string UserName {     get { return _UserName; }     set { if (value != _UserName)     {         _UserName = value;         OnNotifyPropertyChanged('UserName');     }} }  private void OnNotifyPropertyChanged(string property) {   if (PropertyChanged != null)     PropertyChanged(this, new PropertyChangedEventArgs(property)); } 

and databind like

<TextBox Text='{Binding UserName}'/>