从客户端到服务器vb.net获取真正的字符串

Question

listener = New TcpListener(System.Net.IPAddress.Any, portconnect)
    listener.Start()
    client = listener.AcceptTcpClient
    loginInfo = receivedata()
    Dim array() As String
    array = loginInfo.Split("|")
    username = array(0)
    pass = array(1)

信息客户端发送到服务器的是logininfo。 我将logininfo转换为用户名和密码。

Public Function authentication(ByVal user As String, ByVal pass As String) As Boolean
        Dim authentica As Boolean = False
        Dim con As New OleDbConnection
    Try
        con.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" & "  data source= " & Application.StartupPath & "\" & dataName

        Dim myCommand As OleDbCommand = con.CreateCommand()
        Dim sqlstr As String = ""
        sqlstr = "Select password from tbusers where Username = " & "'" & user & "'"
        myCommand.CommandText = sqlstr
        con.Open()
        Dim passw As String
        passw = myCommand.ExecuteScalar()
        con.Close()
        If pass = passw Then
            authentica = True
        End If

    Catch ex As Exception
        MsgBox(ex.ToString)
    End Try
    Return authentica
End Function

问题是： If pass = passw Then authentica = True End If Allways返回false。 请帮忙

Answer 1

如果管道字符'|' 总是分开用户名和密码，拆分：

Dim str As String = "username|password"
Dim splitString() As String = str.Split("|")
Dim userName As String = splitString(0)
Dim password As String = splitString(1)

正如您所提到的，如果用户名的长度不同（因为它很可能会！），您将需要一些常量作为拆分的基础。

但是最好还是分开用户名和密码，以便可以独立访问它们。

Answer 2

您可以使用拆分功能

Dim str as String = "username|password"

Debug.writeline("Username is " + str.Split("|"c)(0))
Debug.writeline("Password is " + str.Split("|"c)(1))

以这种方式发送这些似乎是一个坏主意。 例如：如果密码包含管道符，会发生什么？