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)
Available in Sandboxed Solutions: Yes
Available in SharePoint Online
Syntax
'Declaration
<ClientCallableAttribute> _
<ClientCallableConstraintAttribute(FixedId := "1", Type := ClientCallableConstraintType.Custom, Value := "The value can not be set to FALSE for the built-in fields or for the site columns")> _
Public Property EnforceUniqueValues As Boolean
Get
Set
'Usage
Dim instance As SPField
Dim value As Boolean
value = instance.EnforceUniqueValues
instance.EnforceUniqueValues = value
[ClientCallableAttribute]
[ClientCallableConstraintAttribute(FixedId = "1", Type = ClientCallableConstraintType.Custom, Value = "The value can not be set to FALSE for the built-in fields or for the site columns")]
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.
Exceptions
| Exception | Condition |
|---|---|
| SPException | You cannot set this property to true for a built-in field or for a site column. |
Remarks
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
Reference
Microsoft.SharePoint Namespace