c# - 组合框检查项目到单个字符串

Question

这是我的代码，

string _towns = String.Join(",", 
(usercontrol.FindControl("comboTown") as RadComboBox).CheckedItems);

'comboTown' 具有值

Town1
Town2
Town3
Town4

如果我检查Town2and Town3，我想得到Town2,Town3用逗号分隔的单个字符串 likes 。但我的代码返回Telerik.Web.UI.RadComboBoxItem,Telerik.Web.UI.RadComboBoxItem。我怎样才能只获得检查项目的价值？

Answer 1

您必须访问Text的财产RadComboBoxItem

var selectedTowns = (usercontrol.FindControl("comboTown") as RadComboBox)
                                .Items.Where(i => i.Checked)
                                .Select(i => i.Text)
                                .ToArray();

string _towns = String.Join(",", selectedTowns);

Answer 2

string _towns = String.Join(",",(usercontrol.FindControl("comboTown") as RadComboBox).Items
   .Where(i => i.Checked)
   .Select(i => i.Text).ToList());

或者

string _towns = String.Join(",",(usercontrol.FindControl("comboTown") as RadComboBox).CheckedItems).Select(i => i.Text).ToList());

Answer 3

StringBuilder str= new StringBuilder();
//Register Combo Selected Index Changed Event
Combo_OnSelectedIndexChange(abc,abc) {
{
str.append(ComboBox1.SelectedItem.Text+",");
}