datagridviewcombobox - 在 Vb.net 中设置 Datagirdviewcombobox 列值

Question

我有带有两个 datagridviewcombo 列的数据网格，一列是动态填充，一列具有固定的硬编码值。问题是我无法设置动态 GridViewComboBox 的值，当我尝试设置它时会生成持续错误。

System.FormateException：DataGridViewComboBoxCell 值无效。

我加载网格的代码是

   Dim dt As DataTable
    dt = GetDataTable("Select valuecol,displayCol From mytable")  'GetDataTable gives me datatable
    cmbAntibiotics.DataSource = dt
    cmbAntibiotics.DisplayMember = "Antibiotics"
    cmbAntibiotics.ValueMember = "AntibioticsID"

    Dim Index As Integer

    Dim dgr As DataGridViewRow
    For Each dr As DataRow In dtFromDB.Rows 'This datatable is filled with database
        Index = dtFromDB.Rows.Count - 1
        GRDAntimicrobials.Rows.Add()
        GRDAntimicrobials.Rows(Index).Cells("cmbAntibiotics").Value = dr("AntibioticsID").ToString   'At this point it shows value (1,2,3) rather then showing its display members
        GRDAntimicrobials.Rows(Index).Cells("AntibioticsStatus").Value = dr("AntibioticsStatus").ToString
    Next

请帮帮我

Answer 1

似乎您正在尝试将值分配给单元格上的任何内容，而不是实例化驻留在单元格中的对象然后分配其值。我会尝试这样的事情：

Dim vComboBoxColumn As DropDownList = DirectCast(GRDAntimicrobials.Rows(index).Cells("cmbAntibiotics"))
vComboBoxColumn.Value = dr("AntibioticsStatus").ToString