FormViewUpdatedEventArgs::OldValues Property
Gets a dictionary that contains the original non-key field name/value pairs for the updated record.
Assembly: System.Web (in System.Web.dll)
Property Value
Type: System.Collections.Specialized::IOrderedDictionaryAn IOrderedDictionary that contains a dictionary of the original field name/value pairs for the updated record.
Use the OldValues property to access the original non-key field values for the updated record. For example, you can use these values to keep a log of updated records. A data source control that supports conflict detection (optimistic concurrency checking), such as the SqlDataSource and ObjectDataSource controls, with its ConflictDetection property set to the ConflictOptions.CompareAllValues also compares these original values against the record in the database before an update operation is performed. If a record has been modified by another user concurrently, the record is not updated.
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The OldValues property does not contain key fields. If you allow the user to update the values of the key fields, the original key field values are stored in the Keys property. The updated values are stored in the NewValues property. |
The NewValues property returns an OrderedDictionary object that implements the System.Collections.Specialized::IOrderedDictionary interface. The OrderedDictionary object contains System.Collections::DictionaryEntry objects that represent the fields of the updated record. To access the field names, use the Keys property of the OrderedDictionary object. Similarly, you can access the field values by using the Values property.
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As a shortcut, you can also use the indexer of the OrderedDictionary object to access the field values directly. Data source controls that rely on the field order (such as AccessDataSource) can access field values only by index. |
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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