Question

Is there any way in WPF I can getb a value from a property to display in a textbox, then when the value of the textbox is updated, update a different property on a bound object? Eg: for two fields – Quantity and NewQuantity. I was thinking something along the lines of an IMultiValueConverter but if I try to add a binding to the object with , I get a “Two way binding requires a path or XPath error”.

The problem is that I’m using a web service, so the proxy classes are autogenerated.

Answer 1

I’m not sure I’d recommend it, because it really is a horrible bit of code, but you could do this in the viewmodel to get the behaviour you want:

private string _quantity;
private string _newQuantity;

//Bind to this
public string Quantity
{
    get { return _quantity; }
    set { _newQuantity = value; }
}

public string NewQuantity
{
    get { return _newQuantity; }
}