Question

以下是我在vb.net中编写的代码。

受保护的子OpenIdButton3_LoggedIn（ByVal sender As Object，ByVal e As DotNetOpenAuth.OpenId.RelyingParty.OpenIdEventArgs）处理OpenIdButton3.LoggedIn

OpenIdButton3.Visible = False

Dim profile As ClaimsResponse = e.Response.GetExtension（Of ClaimsResponse）（）

Dim email As String = profile.Email

MSGBOX（电子邮件）

End Sub

但是行

Dim email As String = profile.Email

发出以下错误。

异常详细信息：System.NullReferenceException：未将对象引用设置为对象的实例。

我已阅读相关文档，并在webconfig中实现了AXFetchAsSregTransform。以下是显示相同的块。

<sectionGroup name="dotNetOpenAuth" type="DotNetOpenAuth.Configuration.DotNetOpenAuthSection, DotNetOpenAuth.Core">
  <section name="dotNetOpenAuth" type="DotNetOpenAuth.Configuration.DotNetOpenAuthSection" requirePermission="false" allowLocation="true" />
  <section name="openid" type="DotNetOpenAuth.Configuration.OpenIdElement, DotNetOpenAuth.OpenId" requirePermission="false" allowLocation="true" />
  <section name="oauth" type="DotNetOpenAuth.Configuration.OAuthElement, DotNetOpenAuth.OAuth" requirePermission="false" allowLocation="true" />
  <section name="messaging" type="DotNetOpenAuth.Configuration.MessagingElement, DotNetOpenAuth.Core" requirePermission="false" allowLocation="true" />
  <section name="reporting" type="DotNetOpenAuth.Configuration.ReportingElement, DotNetOpenAuth.Core" requirePermission="false" allowLocation="true" />
</sectionGroup>

＆GT; ＆LT; dotNetOpenAuth＆GT;

<openid>

  <relyingParty>

      <add type="DotNetOpenAuth.OpenId.Behaviors.AXFetchAsSregTransform, DotNetOpenAuth" />

    </behaviors>

  </relyingParty>

</openid>

＆LT; / dotNetOpenAuth＆GT;

即便如此，我似乎也获得了空值。我正在从Google获得身份验证。

有人可以帮我吗？

Answer 1

最后，我找到了解决方案。在这里发布，以便其他面临同样问题的人可以得到帮助。

＆＃39;全球声明 - 如果您在本地申报，出于某种原因，它们似乎无法正常工作




Dim relyingParty As New OpenIdRelyingParty

Dim authResponse As IAuthenticationResponse

声明后，在您的网络表单上创建一个按钮，允许用户登录Google。还有一个标签，显示已登录用户的电子邮件ID。

＆＃39;在页面加载上放置以下代码。

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Dim googleAppsDiscovery As New HostMetaDiscoveryService() With {.UseGoogleHostedHostMeta = True}
    relyingParty.DiscoveryServices.Insert(0, googleAppsDiscovery)

    authResponse = relyingParty.GetResponse()

    If authResponse IsNot Nothing Then
        If authResponse.Status = AuthenticationStatus.Authenticated Then
            Dim fetch As FetchResponse = authResponse.GetExtension(Of FetchResponse)()
            If fetch IsNot Nothing Then
                ' Save user details in session variables
                'Dim temp As [String]() = fetch.GetAttributeValue(WellKnownAttributes.Contact.Email).ToString().Split("@"c)
                Dim temp As String = fetch.GetAttributeValue(WellKnownAttributes.Contact.Email).ToString()
                If temp IsNot Nothing Then
                    Dim userName As String = temp
                    Label1.Text = "You are logged in as : " & userName
                End If
            End If
        End If
    End If
End Sub

将以下代码放入按钮

的点击事件中

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim currentPageURL As String = curPageURL.ToString

    Dim urlRealm As New Uri(currentPageURL)
    Dim urlReturn As New Uri(currentPageURL)

    Dim rm As Realm = New Realm(urlRealm)
    Dim gIdentifier As String = "https://www.google.com/accounts/o8/id"

    Dim request As IAuthenticationRequest = relyingParty.CreateRequest(gIdentifier, urlRealm, urlReturn)

    Dim fetch As New FetchRequest

    fetch.Attributes.Add(New AttributeRequest(WellKnownAttributes.Contact.Email, True))
    request.AddExtension(fetch)

    request.RedirectToProvider()
End Sub

添加以下两项功能以获取您当前的网址

Function curPageURL() As String
    Dim s, protocol, port As String

    If Request.ServerVariables("HTTPS") = "on" Then
        s = "s"
    Else
        s = ""
    End If

    protocol = strLeft(LCase(Request.ServerVariables("SERVER_PROTOCOL")), "/") & s

    If Request.ServerVariables("SERVER_PORT") = "80" Then
        port = ""
    Else
        port = ":" & Request.ServerVariables("SERVER_PORT")
    End If

    curPageURL = protocol & "://" & Request.ServerVariables("SERVER_NAME") & _
          port & Request.ServerVariables("SCRIPT_NAME")
End Function

Function strLeft(ByVal str1 As String, ByVal str2 As String) As String
    strLeft = Left(str1, InStr(str1, str2) - 1)
End Function

你已经完成了。

OpenIdButton的扩展名返回null

1 个答案: