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ConstraintCollection.Item Property (Int32)

Gets the Constraint from the collection at the specified index.

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

public Constraint this[
	int index
] { get; }


Type: System.Int32

The index of the constraint to return.

Property Value

Type: System.Data.Constraint
The Constraint at the specified index.


The index value is greater than the number of items in the collection.

Use the Contains method to test for the existence of a specific constraint.

The following example gets each Constraint from the ConstraintCollection.

private void GetConstraint(DataTable table)
    for(int i = 0; i < table.Constraints.Count; i++)

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, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0