DataColumnMappingCollection.Contains Method (Object)


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Gets a value indicating whether a DataColumnMapping object with the given Object exists in the collection.

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

public bool Contains(
	object value


Type: System.Object

An Object that is the DataColumnMapping.

Return Value

Type: System.Boolean

true if the collection contains the specified DataColumnMapping object; otherwise, false.

Exception Condition

The object passed in was not a DataColumnMapping object.

The following example searches for a DataColumnMapping within the collection. If the mapping exists in the collection, it is removed. If the mapping does not exist within the collection, it is added to the collection and its index is displayed. The example assumes that a DataColumnMappingCollection collection and a DataColumnMapping object have been created.

public void ChangedMyMind() 
    // ...
    // create mappings and mapping
    // ...
    if (mappings.Contains((Object) mapping))
        mappings.Remove((Object) mapping);
        mappings.Add((Object) mapping);
        Console.WriteLine("Index of new mapping: " +
            mappings.IndexOf((Object) mapping));

.NET Framework
Available since 1.1
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