Question

例如，使用以下控件的形式

组合框（cboProducts）
文本框（txtQty）
trueDBGrid（uisng Component One Control）（grdSale）

所以， cboProducts正在填充Product_name，Product_Id from Products表，选择产品（cboProducts）后，下一步就是输入数量（txtQty）在输入数量后，网格应填充上面输入的项目。

我的计划

将输入的产品数量添加到Datatbale，然后将Datatable添加到我的grdSale

我认为还有另外一种好的方法，我希望得到好的答案

谢谢

Answer 1

我倾向于使用这样的东西，这假定列已定义

    grdSale.Rows.Clear()

    For Each item As myObject In MyObjects

        Dim row As New DataGridViewRow
        row.CreateCells(grdSale)

        row.Cells(0).Value = item.PKId
        row.Cells(1).Value = item.Product_Desc
        row.Cells(2).Value = item.Quantity
        row.Cells(3).Value = item.Price

        item.Rows.Add(row)
    Next

Answer 2

GridView使用数据源。在您的情况下，它使用数据表作为其来源。（我是一个c＃开发人员，所以语法可能有点偏离）

Dim dt As New System.Data.DataTable
dt = GetDataFromDB()

gridView.DataSource = dt

成功为控件创建事件后，您应该只在数据表中添加新行，并且更改将在网格中显示。

Sub AddRow(byval productID as Integer, byval productName as string, byval qty as Integer)
  dim row as System.Data.DataRow
  row = dt.NewRow()  'this gets a fresh row from the datatable. Since you already have the datatable defined, the for will have the appropriate columns for your data

  row("productID") = productID
  row("productName") = productName
  row("qry") = qry

  dt.Rows.Add(row) ' at this line you add the new row to the datatable which is "viewed" by a grid and which in turn shows the new information inside itself.

End Sub

Answer 3

这个怎么样？

Private Sub cboProducts_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles cboProducts.KeyDown
    If e.KeyCode = Keys.Enter Then
        Dim pdt, pdtid As String
        Dim i As Integer
        pdt = cboProducts.Columns(0).Text
        pdtid = cboProducts.Columns(1).Text.ToString
        grdSale.SetDataBinding()
        If grdSale.Rows.Count = 0 Then
            i = 0
        Else
            i = i + grdSale.Rows.Count
        End If
        grdSale.AddRows(1)
        grdSale(i, 0) = pdt
        grdSale(i, 1) = pdtid
    End If
End Sub

哪种方法是将选定值添加到数据网格中的快速且好的方法

3 个答案: