RowCellValidationArgs.OldValue Property

Gets the cell’s old valid value.

Namespace: DevExpress.Mvvm.Xpf

Assembly: DevExpress.Mvvm.v25.1.dll

NuGet Packages: DevExpress.Mvvm, DevExpress.Win.Navigation

Declaration

C#

public object OldValue { get; }

VB.NET

Public ReadOnly Property OldValue As Object

Property Value

Type	Description
Object	The cell’s old valid value.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the OldValue property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

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;

VB.NET

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