Pass view to viewmodel with datatemplate
- by jpsstavares
I have a ParameterView and ParameterViewModel, and I need the ParameterViewModel to have a reference to the Parameter view (more on that later). In the window I have a list of ParameterViewModels and in the ResourceDictionary I add the DataTemplate:
<DataTemplate DataType="{x:Type my:ParameterViewModel}" >
<my:ParameterView HorizontalAlignment="Left"/>
</DataTemplate>
I then bind an ItemsControl.ItemSource to the List of ParameterViewModels
The problem is: How can I pass the ParameterView to the ParameterViewModel in this scenario?
The reason I need the ParameterView in the ParameterViewModel is the following:
I have a TextBox whose Text property is binded to the PropertyModelView.Name property. But I want to display a default string when the Name is empty or Null. I've tried to set the property value to the default string I want when that happens but the TextBox.Text is not set in this scenario. I do something like this:
private string _name;
public string Name
{
get { return _name; }
set
{
if (value == null || value.Length == 0)
Name = _defaultName;
else
_name = value;
}
}
I've also tried to specifically set the TextBox.Text binding mode to TwoWay without success.
I think this is a defense mechanism to prevent an infinite loop from happening but I don't know for sure.
Any help on this front would also be highly appreciated.
Thanks,
José Tavares
