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ConstraintCollection.RemoveAt Method

Removes the Constraint object at the specified index from the collection.

Namespace:  System.Data
Assembly:  System.Data (in System.Data.dll)
public void RemoveAt(
	int index
)

Parameters

index
Type: System.Int32

The index of the Constraint to remove.

ExceptionCondition
IndexOutOfRangeException

The collection does not have a constraint at this index.

The IndexOf method returns the index of a specific Constraint.

Before using the RemoveAt method, you can use the Contains method to determine whether the collection contains the target Constraint, and the CanRemove method to determine whether a Constraint can be removed.

The CollectionChanged event occurs if the constraint is successfully removed.

The following example uses the IndexOf method together with the RemoveAt method to remove a constraint from the ConstraintCollection.

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());
    }
}

.NET Framework

Supported in: 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 Phone 8.1, Windows Phone 8, 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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