AuthorizationStoreRoleProvider::RoleExists Method
Gets a value indicating whether the specified role name already exists in the authorization-manager policy store.
Assembly: System.Web (in System.Web.dll)
Parameters
- roleName
- Type: System::String
The name of the role to search for in the authorization-manager policy store.
Return Value
Type: System::Booleantrue if the role name already exists in the authorization-manager policy store; otherwise, false.
| Exception | Condition |
|---|---|
| ArgumentNullException | roleName is nullptr. |
| ArgumentException | roleName is an empty string. -or- roleName contains a comma. |
| ProviderException | The configured applicationName was not found. -or- The configured scopeName was not found. -or- The authorization-manager runtime is not installed on the server. |
| FileNotFoundException | The connectionStringName attribute references a connection string to a file that does not exist. |
| HttpException | The AuthorizationStoreRoleProvider instance is configured with a file-based policy store, and read access to the file is not allowed at the current trust level. |
The RoleExists method is called by the Roles class to determine whether a role name exists in the authorization-manager data store specified in the ASP.NET application's configuration file (Web.config).
The following code example uses the RoleExists method to determine whether a role name already exists before creating the role. For an example of a Web.config file that enables role management, see AuthorizationStoreRoleProvider.
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.