Vb.net 向groupbox动态添加复选框

我试图根据数据表中的行数动态地将复选框添加到groupd框中。当循环通过时，我得到了我的第一个结果，但我无法得到下一个结果来显示…这是我的代码

Dim q As String
    Dim qt As DataTable
    Dim gbHeight As Integer = 40
    Dim checkHG As Integer = 5
    Dim checkHN As Integer = 5


    q = "Select * from loads where filenumber = " & Shipments2.txtFileNumber.Text
    qt = GetSQL(q)


    For i = 0 To qt.Rows.Count - 1
        Dim items As New List(Of LoadDetails)
        Dim ld As New LoadDetails

        items = ld.GetListBySQL("select * from loadDetails where LoadNumber = " & qt.Rows(i).Item("id"))
        For Each item As LoadDetails In items
            Dim checkgross = New CheckBox
            Dim checknet = New CheckBox
            gbHeight += 20

            'add checkbox control to form
            checkgross.Location = New Point(40, checkHG + 20)
            checkgross.Text = item.Description & " (Gross)"
            checkgross.Size = New Size(250, 20)
            checkgross.Name = item.ProductCode.ToString & "-gross"


            gbGross.Size = New Size(329, gbHeight)
            gbGross.Controls.Add(checkgross)


            rbPrintingNet.Location = New Point(rbPrintingNet.Location.X, rbPrintingNet.Location.Y + 40)

            checknet.Location = New Point(40, checkHN + 20)
            checknet.Text = item.Description & " (Net)"
            checknet.Size = New Size(250, 20)
            checknet.Name = item.ProductCode.ToString & "-net"

            gbNet.Location = New Point(44, rbPrintingNet.Location.Y + 25)
            gbNet.Size = New Size(329, gbHeight)
            gbNet.Controls.Add(checknet)

            Me.Size = New Size(Me.Size.Width, Me.Size.Height + 50)


        Next
    Next

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所有控件都直接位于彼此的顶部：

checkgross.Location = New Point(40, checkHG + 20)

因为

checkHG

从未改变。更改每个动态控件的位置（）。

您只需在GroupBox中添加一个停靠的FlowLayoutPanel，就不必担心显式设置每个动态控件的位置（）。