?Public Class DBUser
    Private _UserName As String
    Private _Password As String
    Private _Mod1 As String
    Private _Mod2 As String
    Private _RealName As String
    Private _Memo As String

    Property UserName() As String
        Get
            Return _UserName
        End Get
        Set(ByVal value As String)
            _UserName = value
        End Set
    End Property
    Property Password() As String
        Get
            Return _Password
        End Get
        Set(ByVal value As String)
            _Password = value
        End Set
    End Property

    Property Mod1() As String
        Get
            Return _Mod1
        End Get
        Set(ByVal value As String)
            _Mod1 = value
        End Set
    End Property

    Property Mod2() As String
        Get
            Return _Mod2
        End Get
        Set(ByVal value As String)
            _Mod2 = value
        End Set
    End Property

    Property RealName() As String
        Get
            Return _RealName

        End Get
        Set(ByVal value As String)
            _RealName = value
        End Set
    End Property

    Property Memo() As String
        Get
            Return _Memo
        End Get
        Set(ByVal value As String)
            _Memo = value
        End Set
    End Property
    Sub New(ByVal Name As String, ByVal PWD As String)
        _UserName = Name
        _Password = PWD
    End Sub

    Function LoginConfirm() As Boolean
        Dim SQLString As String
        Dim MSG As String
        SQLString = "SELECT * FROM tbUser WHERE UserName='" & _UserName & "' AND Password='" & _Password & "'"
        'SQL查詢語句
        Dim UserTable As DataTable = DBOperation.DBOperate(SQLString, MSG)
        If UserTable.Rows.Count = 0 Then    '判斷用戶是否存在
            MsgBox("輸入用戶名或密碼有誤，請重試", MsgBoxStyle.Exclamation, "信息框")
            Return False
        Else
            '判斷用戶密碼是否正確 
            _RealName = UserTable.Rows(0)("RealName")
            _Mod1 = UserTable.Rows(0)("Mod1")
            _Mod2 = UserTable.Rows(0)("Mod2")
            _Memo = UserTable.Rows(0)("Memo")
            Return True
        End If
    End Function


    Function PasswordModify(ByVal NewPassword As String) As Boolean
        Dim SQLString As String
        Dim MSG As String
        SQLString = "UPDATE tbUser SET [Password] ='" & NewPassword & "' WHERE UserName='" & _UserName & "'"
        DBOperation.DBOperate(SQLString, MSG)
    End Function

    Sub DelUser(ByVal DeleteUserName As String)
        Dim SQLString As String
        Dim MSG As String
        SQLString = "DELETE FROM tbUser WHERE UserName ='" & DeleteUserName & "'"
        DBOperation.DBOperate(SQLString, MSG)
    End Sub

    Function AddUser(ByVal User As DBUser) As Boolean
        Dim SQLString As String
        Dim MSG As String
        SQLString = "SELECT * FROM tbUser WHERE UserName='" & User.UserName & "' AND Password='" & User.Password & "'"
        Dim UserTable As DataTable = DBOperation.DBOperate(SQLString, MSG)
        If UserTable.Rows.Count >= 1 Then    '判斷用戶是否存在
            MsgBox("輸入用戶名已存在，請重試", MsgBoxStyle.Exclamation, "信息框")
            Return False
        Else
            SQLString = "INSERT INTO tbUser VALUES('" & User.UserName & "','" & User.Password & "','" & User.RealName & "','" & User.Mod1 & "','" & User.Mod2 & "','" & User.Memo & "')"
            DBOperation.DBOperate(SQLString, MSG)
            Return True
        End If

    End Function

    Shared Function AttachCode() As String '隨機生成五位附加驗證碼A~Z
        Dim TempCode As String = ""
        Dim randomvalue As Integer
        Dim I As Integer
        Randomize()
        For I = 1 To 5
            randomvalue = CInt(Int((90 - 65 + 1) * Rnd() + 65))
            TempCode = TempCode + Chr(randomvalue)
        Next
        Return TempCode
    End Function
End Class