Sql server Visual Studio 2012中的密码验证-使用BindingSource和SQL数据库

我需要帮助。需要进行密码验证，但不知道为什么它不起作用。有人能告诉我我的代码缺失了什么，或者我的思维方式到底出了什么问题吗？我将它连接到dataset2，其中是名为Users2的表。表由两列组成：“用户名”和“密码”。Users2BiningSource.Find应返回当前查询所在索引的值。返回值总是-1，我猜这意味着找不到（false）。我正在使用MicrosoftVisualStudio2012和SQLServer2008SP3，都在Windows7上。谢谢你的时间和帮助

Imports Hotel_Booking_System.DataSet2TableAdapters



Public Class Logging


Public Sub check_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Me.Check_Details()
End Sub


Private Sub Quit_Click(sender As Object, e As EventArgs) Handles Button2.Click
    Me.Close()
End Sub

Public Sub Logging_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Me.Users2TableAdapter.Fill(Me.DataSet2.Users2)
    'TODO: This line of code loads data into the 'DataSet2.Users2' table. You can move,     or remove it, as needed.

End Sub

Public Sub Check_Details()

Me.Users2BindingSource.AddNew()

    Dim Usrnm As String = ""
    Usrnm = txtUsername.Text
    Dim Pswrd As String = ""
    Pswrd = txtPassword.Text
    Dim Found As Integer
    Found = Users2BindingSource.Find("Username", Usrnm)
    Dim Found2 As Integer
    Found2 = Users2BindingSource.Find("Password", Pswrd)


    If Found >= 0 And Found2 >= 0 And Usrnm = "Admin" Then
        Me.Hide()
        Booking.Show()
    ElseIf Found >= 0 And Found2 >= 0 Then
        Me.Hide()
        Rooms.Show()
    Else
        MsgBox("Wrong username or password. Please try again", MsgBoxStyle.DefaultButton1,     "SOMETHING WENT WRONG")
    End If
    Label1.Text = Found 'checking the value of found
    Label2.Text = Found2 ' checking the value of found2
End Sub

End Class

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希望您在执行比较之前对密码进行哈希运算！我想这不是问题。