Question

在运行时创建datagridview（Mydgv1）。其中的第一列是一个可编辑的组合框列。我为它设置了显示成员和值成员，但我无法获取正确的显示/值成员。当我从下拉列表中选择一个项目时，我得到值/显示成员的值作为下拉列表中最后一项的值/显示成员。为什么值/显示成员不随组合中的所选项目而变化箱栏。

On Form Load Event

combo.HeaderText = "Item"
combo.Name = "itemid"
combo.Items.Clear()
Dim ds As SqlDataReader
Dim cmm As New SqlCommand("select itemid from itemdesc", con)
con.Open()
    ds = cmm.ExecuteReader
    If ds.HasRows Then
        While ds.Read
            combo.Items.Add(ds(0).ToString)
            combo.ValueMember = ds("itemid")
            combo.DisplayMember = ds("itemid")
        End While
    End If
con.Close()
Mydgv1.Columns.Add(combo)

On comboboxcolumn's Leave Event

it = combo.DisplayMember
MsgBox(it)

Answer 1

不要引用displaymember本身并使用SelectedIndexChanged事件来检索所选值

Private Sub combo_SelectedIndexChanged(sender as Object, e as EventArgs) Handels combo.SelectedIndexChanged

    'because your display and valuemember are set as the same
    MsgBox(combo.SelectedValue.ToString)
    'if you want the displaymember as the result use
    MsgBox(combo.Text)

End Sub

显示/值成员不随组合框的选定索引而变化

1 个答案: