vb.net - 创建动态 DataGridViewComboBoxCell

Question

这就是我的情况。我有一个 DataGridView，它有两列，我试图将它们设置为 DataGridViewComboBoxColumns，称为“已接收”和“缺货”。

这些组合框的目的是创建一个下拉菜单，以选择当我的公司收到货件时收到/缺货的商品数量。该程序将主要在没有鼠标或键盘的触摸屏设置上运行，这就是为什么我选择使用组合框而不是仅仅要求一般用户输入。

我尝试按如下方式设置 DataGridView:

'Setup of Combo Box Columns
'shipmentData is the name of the DataGridView
Dim receiveCol As New DataGridViewComboBoxColumn()
receiveCol.HeaderText = "Received"
receiveCol.Name = "Received"
shipmentData.Columns.Add(receiveCol)
Dim backorderCol As New DataGridViewComboBoxColumn()
backorderCol.HeaderText = "Backordered"
backorderCol.Name = "Backordered"
shipmentData.Columns.Add(backorderCol)

上面的代码位于创建表单时的New()子中。我正在尝试将数据加载到组合框中，如下所示:

Dim rowNum As Integer = 0
For Each op As OrderPart In OrderData.GetPartList()
    If op.AmountOrdered > 0 Then
        shipmentData.Rows.Add()
        shipmentData.Rows(rowNum).Cells("PartNumber").Value = op.PartNumber
        shipmentData.Rows(rowNum).Cells("Description").Value = op.Description
        shipmentData.Rows(rowNUm).Cells("Ordered").Value = op.AmountOrdered
        For it As Integer = 0 To op.AmountOrdered
            CType(shipmentData.Rows(rowNum).Cells("Received"), DataGridViewComboBoxCell).Items.Add(it)
            CType(shipmentData.Rows(rowNum).Cells("Backordered"), DataGridViewComboBoxCell).Items.Add(it)
        Next
        rowNum = rowNum + 1
    End If
Next

现在，当我运行代码时，将创建组合框并添加它们的数据。但是，每当我从组合框列表中选择一个数据值，然后尝试移动到另一个销售时，我都会收到以下错误:

System.ArgumentException: DataGridViewComboBoxCell value is not valid.

为什么我会收到此错误，如何修复它？我似乎无法弄清楚我的代码中做错了什么。

Answer 1

虽然我不知道为什么要向您的保管箱添加递增数字，但如果您打算这样做，请将代码更改为以下内容:

For it As Integer = 0 To op.AmountOrdered
    CType(shipmentData.Rows(rowNum).Cells("Received"), DataGridViewComboBoxCell).Items.Add(it.ToString())
    CType(shipmentData.Rows(rowNum).Cells("Backordered"), DataGridViewComboBoxCell).Items.Add(it.ToString())
Next