Asp.net 指定的强制转换错误
我正在使用VS2012和Asp.net 指定的强制转换错误,asp.net,login,casting,Asp.net,Login,Casting,我正在使用VS2012和ASP.NET 4.5以及MySQL作为我的数据库提供程序。 我现在在代码上得到了一个指定的强制转换错误,该代码在某一点上运行良好。 它来自my Register.aspx页面,用于注册验证,代码改编自asp.net网站教程 这是代码,错误出现在Dim newUser as Guid行 Protected Sub RegisterUser_CreatedUser(ByVal sender As Object, ByVal e As EventArgs) Handles R
ASP.NET 4.5
以及MySQL
作为我的数据库提供程序。
我现在在代码上得到了一个指定的强制转换错误,该代码在某一点上运行良好。
它来自my Register.aspx页面,用于注册验证,代码改编自asp.net网站教程
这是代码,错误出现在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
Protected Sub RegisterUser_CreatedUser(ByVal sender作为对象,ByVal e作为事件args)处理RegisterUser.CreatedUser
FormsAuthentication.SetAuthCookie(RegisterUser.UserName,False)
Dim newUser As MembershipUser=Membership.GetUser(RegisterUser.UserName)
作为Guid=DirectCast的Dim newUserID(newUser.ProviderUserKey,Guid)
Dim urlBase As String=Request.Url.GetLeftPart(UriPartial.Authority)&Request.ApplicationPath
Dim verifyUrl As String=“VerifyNewUser.aspx?ID=“&newUserID.ToString()
将完整路径设置为字符串=urlBase&verifyUrl
Dim appPath作为字符串=Request.PhysicalApplicationPath
Dim sr作为新的StreamReader(appPath和“EmailTemplates/VerifyUserAccount.txt”)
将mailMessage设置为新的mailMessage()
mailMessage.IsBodyHtml=True
mailMessage.From=新邮件地址(“myacct@gmail.com")
mailMessage.To.Add(新邮件地址(RegisterUser.Email))
mailMessage.CC.Add(新邮件地址(“myacct@gmail.com"))
mailMessage.Subject=“新用户注册”
mailMessage.Body=sr.ReadToEnd
高级关闭()
mailMessage.Body=mailMessage.Body.Replace(“,RegisterUser.UserName)
mailMessage.Body=mailMessage.Body.Replace(“,完整路径)
//为gmail设置smtp以发送电子邮件
Dim mailClient作为新的SmtpClient()
使用mailClient
.Port=587'如果不起作用,请尝试465
.EnableSsl=True
.DeliveryMethod=SmtpDeliveryMethod.Network
.UseDefaultCredentials=False
.Credentials=新的网络凭据(mailMessage.From.ToString(),“密码”)
.Host=“smtp.gmail.com”
以
mailClient.Send(mailMessage)
Dim continueUrl As String=RegisterUser.ContinueDestinationPageUrl
如果String.IsNullOrEmpty(continueUrl),则
continueUrl=“~/”
如果结束
响应.重定向(continueUrl)
端接头
当您或任何人创建成员资格提供程序时
需要指定提供程序用户密钥是整数还是Guid。默认的SqlMembershipProvider
将其实现为Guid,而默认的MySqlMembershipProvider
将其实现为int
通过继承其中一个默认值并实现自己版本的ProviderUserKey
4.5文档建议ProviderUserKey可能不是“guid”,您始终可以实现自己的提供程序。表示它是针对sql的(大概是ms sql)。根据你的错误,现在还不是时候。调试的一点,或者可能=新的Guid(newUser.ProviderUserKey.ToString()),进一步的调查发现,当使用mysql作为数据库和提供程序时,您需要强制转换为Int32而不是Guid