BindingContext.Contains Method (Object, String)


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Gets a value indicating whether the BindingContext contains the BindingManagerBase associated with the specified data source and data member.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

Public Function Contains (
	dataSource As Object,
	dataMember As String
) As Boolean


Type: System.Object

An Object that represents the data source.

Type: System.String

The information needed to resolve to a specific BindingManagerBase.

Return Value

Type: System.Boolean

true if the BindingContext contains the specified BindingManagerBase; otherwise, false.

See the Binding class for a list of possible data sources and for information about creating bindings between controls and data sources.

See the Item property for information about returning a BindingManagerBase using a data source and data member.

The following code example uses the Contains method to test whether a specific BindingManagerBase exists before attempting to get it through the Item property.

Private Sub TryContainsDataMember(myDataSet As DataSet)
   Dim trueorfalse As Boolean
   trueorfalse = Me.BindingContext.Contains(myDataSet, "Suppliers")
End Sub

.NET Framework
Available since 1.1
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