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Item Property (String)
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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: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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