INotifyDataErrorInfo.GetErrors Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Gets the validation errors for a specified property or for the entire entity.

Namespace: System.ComponentModel
Assembly: System (in System.dll)

Syntax

Function GetErrors ( _
    propertyName As String _
) As IEnumerable
IEnumerable GetErrors(
    string propertyName
)

Parameters

  • propertyName
    Type: System..::.String
    The name of the property to retrieve validation errors for; or nullNothingnullptra null reference (Nothing in Visual Basic) or Empty, to retrieve entity-level errors.

Return Value

Type: System.Collections..::.IEnumerable
The validation errors for the property or entity.

Remarks

This method returns an IEnumerable that can change as asynchronous validation rules finish processing. This enables the binding engine to automatically update the user interface validation feedback when errors are added, removed, or modified.

The return value can change to a different IEnumerable, or it can reuse a previously returned IEnumerable and change its contents. Any changes to the return value should raise the ErrorsChanged event, even if the return value implements INotifyCollectionChanged.

Examples

For an example of an implementation of this method, see the INotifyDataErrorInfo class overview.

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1

Platforms

Windows Phone

See Also

Reference

INotifyDataErrorInfo Interface

System.ComponentModel Namespace

ErrorsChanged

INotifyCollectionChanged

IDataErrorInfo

Other Resources

Data binding for Windows Phone 8