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ConstraintCollection.Item Property (String)

Gets the Constraint from the collection with the specified name.

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

public Constraint this[
	string name
] { get; }

Parameters

name
Type: System.String

The ConstraintName of the constraint to return.

Property Value

Type: System.Data.Constraint
The Constraint with the specified name; otherwise a null value if the Constraint does not exist.

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

The following example gets the named Constraint.

private void GetConstraint(DataTable table)
{
    if(table.Constraints.Contains("CustomersOrdersConstraint"))
    {
        Constraint constraint = 
            table.Constraints["CustomersOrdersConstraint"];
    }
}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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