Question

我正在使用带有ASP.NET 4.5和MySQL的VS2012作为我的数据库提供程序。我现在得到一个指定的强制转换错误代码，在一点上工作正常。它来自我的Register.aspx页面进行注册验证，代码改编自asp.net网站教程。

以下是代码，错误位于Dim newUser as Guid行

Protected Sub RegisterUser_CreatedUser(ByVal sender As Object, ByVal e As EventArgs) Handles RegisterUser.CreatedUser
    FormsAuthentication.SetAuthCookie(RegisterUser.UserName, False)


    Dim newUser As MembershipUser = Membership.GetUser(RegisterUser.UserName)
    Dim newUserID As Guid = DirectCast(newUser.ProviderUserKey, Guid)
    Dim urlBase As String = Request.Url.GetLeftPart(UriPartial.Authority) & Request.ApplicationPath
    Dim verifyUrl As String = "VerifyNewUser.aspx?ID=" & newUserID.ToString()
    Dim fullPath As String = urlBase & verifyUrl
    Dim appPath As String = Request.PhysicalApplicationPath

    Dim sr As New StreamReader(appPath & "EmailTemplates/VerifyUserAccount.txt")
    Dim mailMessage As New MailMessage()
    mailMessage.IsBodyHtml = True
    mailMessage.From = New MailAddress("myacct@gmail.com")
    mailMessage.To.Add(New MailAddress(RegisterUser.Email))
    mailMessage.CC.Add(New MailAddress("myacct@gmail.com"))
    mailMessage.Subject = "New User Registration"
    mailMessage.Body = sr.ReadToEnd
    sr.Close()

    mailMessage.Body = mailMessage.Body.Replace("<%UserName%>", RegisterUser.UserName)
    mailMessage.Body = mailMessage.Body.Replace("<%VerificationUrl%>", fullPath)

    //Set up the smtp for gmail to send the email
    Dim mailClient As New SmtpClient()
    With mailClient
        .Port = 587 'try 465 if this doesn't work
        .EnableSsl = True
        .DeliveryMethod = SmtpDeliveryMethod.Network
        .UseDefaultCredentials = False
        .Credentials = New NetworkCredential(mailMessage.From.ToString(), "password")
        .Host = "smtp.gmail.com"
    End With
    mailClient.Send(mailMessage)

    Dim continueUrl As String = RegisterUser.ContinueDestinationPageUrl
    If String.IsNullOrEmpty(continueUrl) Then
        continueUrl = "~/"
    End If

    Response.Redirect(continueUrl)
End Sub

Answer 1

当您或任何人创建MembershipProvider时，您需要指定ProviderUserKey是整数还是Guid。默认SqlMembershipProvider将其实现为Guid，而默认MySqlMembershipProvider将其实现为int。

您可以通过继承其中一个默认值并实现自己的ProviderUserKey

版本来实现自己的提供商

指定的强制转换错误

1 个答案: