?Public Class 刪除用戶
    Inherits System.Windows.Forms.Form
    Dim strconn As String = "data source=.;initial catalog=weboy;user id=sa;password=;"
    Dim objds As New Data.DataSet
    Dim objda As SqlClient.SqlDataAdapter
    Dim bingpage As BindingManagerBase
    Dim cn As New SqlClient.SqlConnection
    Dim cmd As SqlClient.SqlCommand
    Dim objcommand As SqlClient.SqlCommand
    Dim objdr As SqlClient.SqlDataReader
    Dim str1 As String
    Dim strsql As String

    Private Sub 刪除用戶_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        If MaskedTextBox1.Text = "" Then
            MessageBox.Show("請輸入用戶名稱!")
            Exit Sub
        End If
        
       strconn = "data source=.;initial catalog=weboy;user id=sa;password=;"


        strsql = "select name,password,power from users "
        objcommand = New SqlClient.SqlCommand(strsql, New SqlClient.SqlConnection(strconn))
        objcommand.Connection.Open()
        objdr = objcommand.ExecuteReader(CommandBehavior.CloseConnection)
        With objdr
            Do While .Read = True
                str1 = .GetString(0)


                If Trim(MaskedTextBox1.Text) = Trim(str1) Then
                    Dim sql As String
                    sql = "delete from users where name ='" & Trim(MaskedTextBox1.Text) & "'"
                    cn.ConnectionString = strconn
                    cn.Open()
                    cmd = New SqlClient.SqlCommand(sql, cn)
                    cmd.ExecuteNonQuery()
                    cmd.Dispose()
                    cn.Dispose()
                    MessageBox.Show("刪除成功！", "恭喜！", MessageBoxButtons.OK, MessageBoxIcon.Information)
                    MaskedTextBox1.Text = ""

                    Exit Sub
                Else
                    MessageBox.Show("請輸正確用戶名！", "系統(tǒng)信息！", MessageBoxButtons.OK, MessageBoxIcon.Information)
                End If
            Loop
        End With
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Me.Close()
    End Sub
End Class