我使用时遇到以下问题RadComboBox
:
ddl_contactList.Items.Clear();
ddl_contactList.DataSource = ContactList.GetContactListsByDep(year, main_code);
ddl_contactList.DataTextField = "list_desc";
ddl_contactList.DataValueField = "list_code";
ddl_contactList.DataBind();
ddl_contactList.Items.Insert(0, new Telerik.Web.UI.RadComboBoxItem("NewList", "-1"));
ddl_contactList.SelectedIndex = 0;
<telerik:RadComboBox ID="ddl_contactList" runat="server" AutoPostBack="True" CausesValidation="False"
CollapseDelay="0" Culture="ar-EG" ExpandDelay="0" Filter="StartsWith" ItemsPerRequest="10"
MarkFirstMatch="true" Skin="Outlook" EnableAutomaticLoadOnDemand="True" EmptyMessage="-List name-"
ShowMoreResultsBox="True"
onselectedindexchanged="ddl_contactList_SelectedIndexChanged" AppendDataBoundItems ="true">
</telerik:RadComboBox>
组合框中的项目数总是1
!!! 尽管数据源包含许多项目,所以当我尝试随时获取任何项目的选定值时,我总是得到-1
!
如何获得正确的selectedvalue
?