protected bool TryClose()
{
ValidatingDialogHost dialogHost = (ValidatingDialogHost)DialogHost ?? new ValidatingDialogHost(this);
IDataErrorInfo validatingDataContext = (IDataErrorInfo)DataContext;
if (validatingDataContext != null)
{
string error = validatingDataContext.Error;
if (error != null)
{
dialogHost.ShowErrorMessage(error, caption: null);
return(false);
}
}
if (dialogHost.OnClosing())
{
DialogResult = true;
return(true);
}
else
{
// A confirmation or validation issue is causing the dialog to stay open.
return(false);
}
}
private void Dialog_Loaded(object sender, EventArgs e)
{
Loaded -= Dialog_Loaded;
// This needs to be set in the loaded event, because a call to InitializeComponent
// from a child class runs _after_ our constructor, and will set the dialog host to null.
DialogHost = new ValidatingDialogHost(this);
}
private void Dialog_Loaded(object sender, EventArgs e)
{
Loaded -= Dialog_Loaded;
// This needs to be set in the loaded event, because a call to InitializeComponent
// from a child class runs _after_ our constructor, and will set the dialog host to null.
DialogHost = new ValidatingDialogHost(this);
}
