Question

我有一个包含3列ID，Name和shortname的表格。我将它绑定到ASP.NET dropdonwlist控件。我将DataTextField指定为ID，将DataValueField指定为Name。

现在，下拉列表正确呈现列表项，我可以选择所选选项的ID。我想要短名称和ID。有没有办法做到这一点？即我想从ASP.NET下拉列表的选定选项中读取ID，短名称和名称

有什么想法吗？

Answer 1

public class SomeClass
{
    public int Id { get; set; }
    public string ShortName { get; set; }
    public string Name { get; set; }

    public string ShortNameWithId
    {
        get
        {
            return string.Format("{0} - {1}", Id, ShortName);
        }
    }
}

现在使用带有Id的短名称，而不是Id。所以，这将被数据绑定到列表框中作为某种集合（某些类），即List，IEnumerable

Answer 2

Protected Function Fld(ByVal pos As Integer, ByVal mfld As String) As String
    Dim i, j, k As Integer
    For i = 1 To pos
        k = j + 1
        j = InStr(k, mfld, Chr(13))
        j = IIf(j = 0, Len(mfld) + 1, j)
    Next
    Return Mid(mfld, k, j - k)
End Function

Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
    Label1.Text = Fld(1, DropDownList1.SelectedItem.Value)
    Label2.Text = Fld(2, DropDownList1.SelectedItem.Value)
End Sub

或者您可以使用：

Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
    Dim Fld As Array
    Fld = DropDownList1.SelectedItem.Value.Split(Chr(13))
    Label1.Text = Fld(0)
    Label2.Text = Fld(1)
End Sub

您还可以在DataValueField中拥有更多列。

Answer 3

    drp.Items.Clear();
    foreach (var item in sourceCollection)
    {
        drp.Items.Add(new ListItem(item.ID+ "," + item.Name + "," + item.ShortName, item.ID));
    }

    //read selected text or value like this:

    string txt = drp.SelectedItem.Text;
    string val = drp.SelectedItem.Value;

ASP.NET下拉列表：绑定更多值选项

3 个答案: