我有一个编辑个人资料页面,用户可以在其中编辑他们的个人资料信息。目前,新用户无法使用此页面,因为他们在“userprofiles”表中没有相应的记录。我在同一个数据库中使用带有相应 aspnet_User 表的 aspnet_membership 系统。'userprofiles' 和 aspnet 表之间没有链接
我有一个名为“DisplayData()”的子程序,它检查表中是否有用户记录,并在文本框中显示他们的个人资料信息。不幸的是,对于新用户,表中没有记录,因此会引发错误
这是我的 Page_Load 子:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Session("userName") = User.Identity.Name
Dim conn As New OleDb.OleDbConnection(ConfigurationManager.ConnectionStrings("BookMeetConnString").ConnectionString)
conn.Open()
Dim cmdcheck As New OleDbCommand("SELECT TravellerName FROM userprofiles WHERE (TravellerName = ?) ", conn)
cmdcheck.Parameters.AddWithValue("@userName", Session("userName"))
Dim profileCheckDr = cmdcheck.ExecuteReader()
If IsDBNull(profileCheckDr("TravellerName")) Then
??
End If
If Not IsPostBack Then
DisplayData()
savec.Visible = False
End If
End Sub
这是我的 DisplayData() 函数,它将所有当前用户配置文件信息输入到页面上的文本框中:
Protected Sub DisplayData()
Dim conn As OleDbConnection = New OleDbConnection(ConfigurationManager.ConnectionStrings("BookMeetConnString").ConnectionString)
Dim sql = "SELECT * FROM userprofiles WHERE TravellerName=@f1"
Dim cmd = New OleDbCommand(sql, conn)
cmd.Parameters.AddWithValue("@f1", User.Identity.Name)
conn.Open()
Dim profileDr = cmd.ExecuteReader()
profileDr.Read()
Dim newEmailAddress = ""
Dim newDescription = ""
Dim newDOB = ""
Dim newLocation = ""
Dim newProfession = ""
Dim newSmoker = ""
Dim newDrinker = ""
Dim newEducationLevel = ""
Dim newMaritalStatus = ""
If Not IsDBNull(profileDr("AvatarURL")) Then ProfilePic.ImageUrl = profileDr.Item("AvatarURL")
If Not IsDBNull(profileDr("EmailAddress")) Then newEmailAddress = profileDr.Item("EmailAddress")
If Not IsDBNull(profileDr("DOB")) Then newDOB = profileDr.Item("DOB")
If Not IsDBNull(profileDr("Location")) Then newLocation = profileDr.Item("Location")
If Not IsDBNull(profileDr("Description")) Then newDescription = profileDr.Item("Description")
If Not IsDBNull(profileDr("Profession")) Then newProfession = profileDr.Item("Profession")
If Not IsDBNull(profileDr("Smoker")) Then newSmoker = profileDr.Item("Smoker")
If Not IsDBNull(profileDr("Drinker")) Then newDrinker = profileDr.Item("Drinker")
If Not IsDBNull(profileDr("EducationLevel")) Then newEducationLevel = profileDr.Item("EducationLevel")
If Not IsDBNull(profileDr("MaritalStatus")) Then newMaritalStatus = profileDr.Item("MaritalStatus")
If Not IsDBNull(profileDr("AvatarURL")) Then ProfilePic.ImageUrl = profileDr.Item("AvatarURL")
description.Text = newDescription
email.Text = newEmailAddress
smoker.SelectedValue = newSmoker
drinker.SelectedValue = newDrinker
dd_userlocation.SelectedValue = newLocation
dob.Text = newDOB
educationlevel.SelectedValue = newEducationLevel
profession.SelectedValue = newProfession
maritalstatus.SelectedValue = newMaritalStatus
conn.Close()
End Sub
如果页面加载子中的查询结果不返回任何内容,我如何突破页面加载子,以便 DisplayData() 子不会运行。我已经尝试过使用“Exit Sub”,但它似乎不起作用。