组合框选中的项目到单个字符串

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

如果我检查了Town2和Town3 ，我想得到像Town2,Town3这样的单个字符串Town2,Town3用逗号分隔。 但是我的代码返回Telerik.Web.UI.RadComboBoxItem,Telerik.Web.UI.RadComboBoxItem 。 如何仅获取已检查项目的值？

Answer 1

您必须访问RadComboBoxItem属性Text

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());

要么

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+",");
}