ActiveDirectoryMembershipProvider.RequiresUniqueEmail Property
Gets a value indicating whether an e-mail address stored on the Active Directory server must be unique.
Assembly: System.Web (in System.Web.dll)
'Declaration Public Overrides ReadOnly Property RequiresUniqueEmail As Boolean 'Usage Dim instance As ActiveDirectoryMembershipProvider Dim value As Boolean value = instance.RequiresUniqueEmail
Property Value
Type: System.Booleantrue if e-mail addresses must be unique; otherwise, false. The default is false.
| Exception | Condition |
|---|---|
| InvalidOperationException | An attempt to access the RequiresUniqueEmail property was made before the ActiveDirectoryMembershipProvider instance was initialized. |
When the RequiresUniqueEmail property is true, the ActiveDirectoryMembershipProvider instance ensures that the e-mail address is not used by any other user within the current scope when either the CreateUser or UpdateUser method is called.
The RequiresUniqueEmail property is set in your application's configuration file using the requiresUniqueEmail attribute of the membership Element (ASP.NET Settings Schema) element. If the property is not set in the application's configuration file, the RequiresUniqueEmail property is set to the default value of false.
The following code example shows a Web.config entry that configures an ActiveDirectoryMembershipProvider instance to require unique e-mail addresses for users stored on the Active Directory server.
<configuration>
<connectionStrings>
<add name="ADService" connectionString="LDAP://ldapServer/" />
</connectionStrings>
<system.web>
<membership defaultProvider="AspNetActiveDirectoryMembershipProvider">
<providers>
<add name="AspNetActiveDirectoryMembershipProvider"
type="System.Web.Security.ActiveDirectoryMembershipProvider,
System.Web, Version=2.0.3600, Culture=neutral,
PublicKeyToken=b03f5f7f11d50a3a"
requiresUniqueEmail="true" />
</providers>
</membership>
</system.web>
</configuration>
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.