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SPField.EnforceUniqueValues property

Gets or sets a Boolean value that specifies whether to enforce uniqueness in column values. The default is false.

Namespace:  Microsoft.SharePoint
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)


Public Property EnforceUniqueValues As Boolean
Dim instance As SPField
Dim value As Boolean

value = instance.EnforceUniqueValues

instance.EnforceUniqueValues = value
public bool EnforceUniqueValues { get; set; }

Property value

Type: System.Boolean
Returns true to enforce uniqueness in values that populate a specified column; otherwise false. The default is false.


Exception Condition

You cannot set this property to true for a built-in field or for a site column.


When you set this property to true, you should also set the Indexed property to true.

The equivalent XML attribute for the Field element in a field definition is AllowDuplicateValues.

See also


SPField class

SPField members

Microsoft.SharePoint namespace

Other resources

Enforcing Uniqueness in Column Values