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X509SelectionFlag Enumeration

Specifies the type of selection requested using the X509Certificate2UI.SelectFromCollection method.

Namespace:  System.Security.Cryptography.X509Certificates
Assembly:  System.Security (in System.Security.dll)

'Declaration
Public Enumeration X509SelectionFlag

Member nameDescription
SingleSelectionA single selection. The UI allows the user to select one X.509 certificate.
MultiSelectionA multiple selection. The user can use the SHIFT or CRTL keys to select more than one X.509 certificate.

This flag represents either a single or multiple certificate selection using the X509Certificate2UI.SelectFromCollection method.

The following code example demonstrates how to use the selection flag with the X509Certificate2UI.SelectFromCollection method. This code example is part of a larger example provided for the X509Store class. The larger example opens the current user's personal certificate store, allows the user to select a certificate, then writes certificate and certificate chain information to the console. The output depends on the certificate the user selects.


'Create new X509 store from local certificate store.
Dim store As New X509Store("MY", StoreLocation.CurrentUser)
store.Open(OpenFlags.OpenExistingOnly Or OpenFlags.ReadWrite)

'Output store information.
Console.WriteLine("Store Information")
Console.WriteLine("Number of certificates in the store: {0}", store.Certificates.Count)
Console.WriteLine("Store location: {0}", store.Location)
Console.WriteLine("Store name: {0} {1}", store.Name, Environment.NewLine)

'Put certificates from the store into a collection so user can select one.
Dim fcollection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
Dim collection As X509Certificate2Collection = X509Certificate2UI.SelectFromCollection(fcollection, "Select an X509 Certificate", "Choose a certificate to examine.", X509SelectionFlag.SingleSelection)
Dim certificate As X509Certificate2 = collection(0)
X509Certificate2UI.DisplayCertificate(certificate)


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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