本文整理匯總了VB.NET中System.Web.Security.RoleProvider.IsUserInRole方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET RoleProvider.IsUserInRole方法的具體用法？VB.NET RoleProvider.IsUserInRole怎麽用？VB.NET RoleProvider.IsUserInRole使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。
在下文中一共展示了RoleProvider.IsUserInRole方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: IsUserInRole
Public Overrides Function IsUserInRole(ByVal username As String, ByVal rolename As String) As Boolean
If username Is Nothing OrElse username = "" Then _
Throw New ProviderException("User name cannot be empty or null.")
If rolename Is Nothing OrElse rolename = "" Then _
Throw New ProviderException("Role name cannot be empty or null.")
Dim userIsInRole As Boolean = False
Dim conn As OdbcConnection = New OdbcConnection(connectionString)
Dim cmd As OdbcCommand = New OdbcCommand("SELECT COUNT(*) FROM UsersInRoles " & _
" WHERE Username = ? AND Rolename = ? AND ApplicationName = ?", conn)
cmd.Parameters.Add("@Username", OdbcType.VarChar, 255).Value = username
cmd.Parameters.Add("@Rolename", OdbcType.VarChar, 255).Value = rolename
cmd.Parameters.Add("@ApplicationName", OdbcType.VarChar, 255).Value = ApplicationName
Try
conn.Open()
Dim numRecs As Integer = CType(cmd.ExecuteScalar(), Integer)
If numRecs > 0 Then
userIsInRole = True
End If
Catch e As OdbcException
' Handle exception.
Finally
conn.Close()
End Try
Return userIsInRole
End Function