This documentation is archived and is not being maintained.

Constraint.ConstraintName Property

The name of a constraint in the ConstraintCollection.

Namespace: System.Data
Assembly: System.Data (in

public virtual string ConstraintName { get; set; }
/** @property */
public String get_ConstraintName ()

/** @property */
public void set_ConstraintName (String value)

public function get ConstraintName () : String

public function set ConstraintName (value : String)

Not applicable.

Property Value

The name of the Constraint.

Exception typeCondition


The Constraint name is a null value or empty string.


The ConstraintCollection already contains a Constraint with the same name (The comparison is not case-sensitive.).

The ConstraintCollection is returned by the Constraints property of the DataTable class.

The following example iterates through the ConstraintCollection of a DataTable and prints each ConstraintName.

private void PrintConstraintNames(DataTable myTable){
   foreach(Constraint cs in myTable.Constraints){

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0