private void DoRebind()
{
// removing possible previous bindings for formatting validation results as colors (would not be needed if elements were always IValidatingObject instances)
if (formatColorBinding != null)
{
tbIntPropList.DataBindings.Remove(intPropColorBinding);
tbStringPropList.DataBindings.Remove(stringPropColorBinding);
tbIntPropList.BackColor = SystemColors.Window;
tbStringPropList.BackColor = SystemColors.Window;
tbIntPropCurrent.BackColor = SystemColors.Window;
tbStringPropCurrent.BackColor = SystemColors.Window;
commandBindings.Remove(formatColorBinding);
formatColorBinding = null;
}
// the actual rebind
IList testList = viewModel.TestList;
listBindingSource.SuspendBinding();
listBindingSource.DataSource = testList;
listBindingSource.ResumeBinding();
errorProvider.UpdateBinding();
// bindings for TextBox.BackColor (could be in the constructor if elements were always IValidatingObject instances but WinForms is not tolerant for invalid property names)
if (testList.Cast <ITestObject>().FirstOrDefault() is IValidatingObject)
{
intPropColorBinding = new Binding(nameof(TextBox.BackColor), listBindingSource, nameof(IValidatingObject.ValidationResults), true, DataSourceUpdateMode.Never);
stringPropColorBinding = new Binding(nameof(TextBox.BackColor), listBindingSource, nameof(IValidatingObject.ValidationResults), true, DataSourceUpdateMode.Never);
formatColorBinding = commandBindings.Add <ConvertEventArgs>(OnFormatColor)
.AddSource(intPropColorBinding, nameof(Binding.Format))
.AddSource(stringPropColorBinding, nameof(Binding.Format));
tbIntPropList.DataBindings.Add(intPropColorBinding);
tbStringPropList.DataBindings.Add(stringPropColorBinding);
}
}
private void UpdateCurrentView()
{
// We remove the earlier binding if any, which releases it subscription automatically.
if (currentItemChangedBinding != null)
{
commandBindings.Remove(currentItemChangedBinding);
}
currentView = CollectionViewSource.GetDefaultView(viewModel.TestList);
// currentView.CurrentChanged -> OnTestListCurrentChangedCommand
currentItemChangedBinding = commandBindings.Add <EventArgs>(OnTestListCurrentChangedCommand)
.AddSource(currentView, nameof(currentView.CurrentChanged));
}
