corelibraries-devexpress-dot-mvvm-dot-xpf-dot-rowcellvalidationargs-ce35df15.md
Gets the cell’s old valid value.
Namespace : DevExpress.Mvvm.Xpf
Assembly : DevExpress.Mvvm.v25.2.dll
NuGet Packages : DevExpress.Mvvm, DevExpress.Win.Navigation
public object OldValue { get; }
Public ReadOnly Property OldValue As Object
| Type | Description |
|---|---|
| Object |
The cell’s old valid value.
|
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the OldValue property.
Note
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wpf-data-grid-validate-cell-editors/CS/ValidateCell_MVVM/MainViewModel.cs#L35
return;
var cellValue = (double)args.OldValue;
var discount = 100 - Convert.ToDouble(args.NewValue) / cellValue * 100;
wpf-data-grid-validate-cell-editors/VB/ValidateCell_MVVM/MainViewModel.vb#L42
If Not Equals(args.FieldName, NameOf(Product.UnitPrice)) OrElse Not CType(args.Item, Product).Discontinued Then Return
Dim cellValue = CDbl(args.OldValue)
Dim discount = 100 - Convert.ToDouble(args.NewValue) / cellValue * 100
See Also