asp.net.vb 不存在数据时尝试读取无效

Question

我不确定为什么这段代码不起作用 我已经根据表字段数据进行了跟踪，但我仍然无法让 SQL Datareader 工作。我检查了表格和所有数据字段，一切都是正确的。但我仍然无法从数据库中读取数据。求助TT

    Dim connectionString = ConfigurationManager.ConnectionStrings("CleanOneConnectionString").ConnectionString
    Dim myConn As New SqlConnection(connectionString)
    myConn.Open()
    Dim cmd = "Select * from [Member] where Email = @Email"
    Dim myCmd As New SqlCommand(cmd, myConn)
    myCmd.Parameters.AddWithValue("@Email", emailBox.Text)
    Dim objReader As SqlDataReader

    objReader = myCmd.ExecuteReader()
    objReader.Read()
    Result.Text = " " 'initialise label to show correct message for available or found


    'Check the reader see if any  record found matching WHERE
    If (objReader.Read()) Then
        'read=true, check Password
        'Dim tpassword As String = objReader.GetString(5)
        'If tpassword = passwordBox.Text Then
        'Result.Text = "** Login Succcessful **"
        Result.Text = objReader.GetString(1)
        'Else
        'Result.Text = "Invalid Password" & objReader.GetString(5) & passwordBox.Text
        'End If
        'reader=false, no such records matching WHERE
    Else
        Result.Text = objReader.GetString(1)
    End If
    myCmd.Dispose()
    myConn.Dispose()

Answer 1

使用 MySql 进行测试：我收到 SQL 语法不正确的错误。

然后我删除了 [ ] 并且它可以工作。

SqlServer 怎么样？至少试试吧，我会说。