CellEditingEnded provides the previous value in the edited cell, I need the new one - How?

Question

I am implementing a minimal Calculation Chain restricted to the current row. When the user types some new
value in a cell (part of a column named "Length"), some sections of the row are re-calculated.
See my handler code:
The problem is that the value found in gridModel.Length is the old one, while I need the one just typed by the user.
TIA

Answer 1

That is because the CellEditingEnded event is raised before the a cell edit is committed so the new value is not yet available:
https://msdn.microsoft.com/en-us/library/system.windows.controls.datagrid.celleditending%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396
You better handle this kind of logic in the setter of the *Length properties in the GridModel class:
private string _SomeLength;
public string SomeLength {
get {
return _SomeLength;
set {
_SomeLength = value;
recalculateLengthDependingCells();
private void Validate() {
//validation logic...
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