ConstraintCollection.IndexOf Method (Constraint)

 

Gets the index of the specified Constraint.

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

public int IndexOf(
	Constraint constraint
)

Parameters

constraint
Type: System.Data.Constraint

The Constraint to search for.

Return Value

Type: System.Int32

The zero-based 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, before it is removed, to determine whether the collection contains the constraint.

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

.NET Framework
Available since 1.1
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