AddRange Method

ConstraintCollection.AddRange Method (Constraint[])


Copies the elements of the specified ConstraintCollection array to the end of the collection.

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

public void AddRange(
	Constraint[] constraints


Type: System.Data.Constraint[]

An array of ConstraintCollection objects to add to the collection.

If BeginInit has been called, AddRange does not add any objects to the collection until EndInit is called. At the time that EndInit is called, the collection will be populated with the items specified in the most recent call to AddRange. If AddRange is called multiple times within a BeginInit / EndInit sequence, only those items specified in the most recent call to AddRange are added.

The following example creates primary and foreign key constraints, and adds them to the ConstraintCollection.

public static void ConstraintAddRange(DataSet dataSet)
        // Reference the tables from the DataSet.
        DataTable customersTable = dataSet.Tables["Customers"];
        DataTable ordersTable = dataSet.Tables["Orders"];

        // Create unique and foreign key constraints.
        UniqueConstraint uniqueConstraint = new 
        ForeignKeyConstraint fkConstraint = new 

        // Add the constraints.
        customersTable.Constraints.AddRange(new Constraint[] 
            {uniqueConstraint, fkConstraint});
    catch(Exception ex)
        // Process exception and return.
        Console.WriteLine("Exception of type {0} occurred.", 

.NET Framework
Available since 1.1
Return to top
© 2015 Microsoft