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ConstraintCollection.IndexOf Method (String)

Gets the index of the Constraint specified by name.

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

public int IndexOf(
	string constraintName
)

Parameters

constraintName
Type: System.String

The name of the Constraint.

Return Value

Type: System.Int32
The index of the Constraint if it is in the collection; otherwise, -1.

Use the IndexOf method to return an index to be used with either the Contains or Remove method.

The following example uses the IndexOf method to return the index of a Constraint. The index is passed to the Contains method to determine whether the collection contains the constraint, before removing it.

private void RemoveConstraint(
    ConstraintCollection constraints, Constraint constraint)
{
    try
    {
        if(constraints.Contains(constraint.ConstraintName)) 
        {
            if(constraints.CanRemove(constraint)) 
            {
                constraints.RemoveAt(
                    constraints.IndexOf(constraint.ConstraintName));
            }
        }
    }
    catch(Exception e) 
    {
        // Process exception and return.
        Console.WriteLine("Exception of type {0} occurred.", 
            e.GetType());
    }
}

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
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