这是我的情况。我有一个DataGridView,我尝试将其设置为DataGridViewComboBoxColumns的两列分别称为“ Received”和“ Backordered”。
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物时接收/延期交货的项目数量。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的原因。
我正在尝试如下设置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)
以上代码位于创建表单时的New()
子目录中。我正尝试将数据加载到ComboBox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ComboBox,并添加其数据。但是,每当我从组合框列表中选择一个数据值,然后尝试移至另一次出售时,都会出现以下错误:
System.ArgumentException:DataGridViewComboBoxCell值无效。
为什么会出现此错误,该如何解决?我似乎无法弄清楚我在代码中做错了什么。
答案 0 :(得分:3)
尽管我不知道为什么要向您的保管箱添加递增数字,但是如果您打算这样做,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