DataTableMappingCollection.Contains Method (String)


Gets a value indicating whether a DataTableMapping object with the specified source table name exists in the collection.

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

public bool Contains(
	string value


Type: System.String

The case-sensitive source table name containing the DataTableMapping object.

Return Value

Type: System.Boolean

true if the collection contains a DataTableMapping object with this source table name; otherwise false.

The following example searches for a DataTableMapping object with the given source table name within a DataTableMappingCollection collection. If the DataTableMapping exists, the example displays the name and the index of the mapping. If the mapping does not exist, the example displays an error. This example assumes that a DataTableMappingCollection collection has been created.

public void FindDataTableMapping() 
    // ...
    // create mappings
    // ...
    if (!mappings.Contains("Categories"))
        Console.WriteLine("Error: no such table in collection");
            ("Name: " + mappings["Categories"].ToString() + "\n"
            + "Index: " + mappings.IndexOf("Categories").ToString());

.NET Framework
Available since 1.1
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