ConstraintCollection.RemoveAt(Int32) Method

Reference

Definition

Namespace:: System.Data

Assembly:: System.Data.Common.dll

Assembly:: System.Data.dll

Assembly:: netstandard.dll

Source:: ConstraintCollection.cs

Source:: ConstraintCollection.cs

Source:: ConstraintCollection.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

public:
 void RemoveAt(int index);

public void RemoveAt (int index);

member this.RemoveAt : int -> unit

Public Sub RemoveAt (index As Integer)

Parameters

index: Int32

The index of the Constraint to remove.

Exceptions

IndexOutOfRangeException

The collection does not have a constraint at this index.

Examples

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());
    }
}

Private Sub RemoveConstraint _
    (constraints As ConstraintCollection, constraint As Constraint)

    Try
        If constraints.Contains(constraint.ConstraintName) Then
            If constraints.CanRemove(constraint) Then
                constraints.RemoveAt _
                    (constraints.IndexOf(constraint.ConstraintName))
            End If
        End If

    Catch e As Exception
        ' Process exception and return.
        Console.WriteLine("Exception of type {0} occurred.", _
            e.GetType().ToString())
    End Try
End Sub

Remarks

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.

Applies to

Toode	Versioonid
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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