问题
I have a object that implements the IEditableObject interface exposed on a viewmodel bound to a Silverlight page.
How/Where do I call the BeginEdit, CancelEdit and EndEdit methods? How can I constrain only objects implementing this interface to my page?
I am NOT using DataGrid or DataForm controls. I am using Label, TextBox and DescriptionViewer controls to display the data for editing.
回答1:
I know this is an old thread (but for the sake of future use...)
I do it this way:
whenever the current item (for instance of a CollectionViewSource) changes this is done:
void View_CurrentChanged(object sender, EventArgs e)
{
if (culturesView.Source != null)
{
((IEditableObject)SelectedRecord).BeginEdit();
RaisePropertyChanged("SelectedRecord");
}
}
Whenever i want to save (the current item) i do this:
private void Save()
{
((IEditableObject)SelectedRecord).EndEdit();
//do the actual saving to the dbms here ....
}
Whenever i want to cancel (current changes) i do this:
private void Cancel()
{
((IEditableObject)SelectedRecord).CancelEdit();
//allthough we have canceled the editing we have to re-enable the edit mode (because
//the user may want to edit the selected record again)
((IEditableObject)SelectedRecord).BeginEdit();
}
Hope it helps someone in the future!
来源：https://stackoverflow.com/questions/1278942/using-ieditableobject-in-silverlight