EntityInstantFeedbackSource.KeyExpression Property

Specifies the name of the key property.

Namespace: DevExpress.Data.Linq

Assembly: DevExpress.Data.v21.2.dll

Declaration

[DefaultValue("")]
public string KeyExpression { get; set; }

Property Value

Type Default Description
String

String.Empty

A String value that specifies the key property name.

Remarks

Usually, the KeyExpression property specifies the name of the property mapped to the primary key column in the database.

You can modify the KeyExpression property value within the EntityInstantFeedbackSource.GetQueryable event handler, via the GetQueryableEventArgs.KeyExpression property.

To specify multiple columns of a composite key, pass the comma-separated or semicolon separated list of key column names to this property. For instance: “KeyPart1;KeyPart2;KeyPart3“.

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

Note

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See Also