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BindingContext.Contains Method (Object, String)

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)

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

Parameters

dataSource
Type: System.Object

An Object that represents the data source.

dataMember
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")
    Console.WriteLine(trueorfalse.ToString())
 End Sub

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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