我有一个包含Telerik RadComboBox的转发器:
<asp:Repeater ID="rpt" runat="server">
<ItemTemplate>
<telerik:RadComboBox ID="rcb" runat="server" EnableLoadOnDemand="true"
AllowCustomText="true" ItemRequestTimeout="1000"
NumberOfItems="10" MarkFirstMatch="false">
</telerik:RadComboBox>
</ItemTemplate>
</asp:Repeater>
在Repeater的ItemDataBound事件中,我按照以下方式连接ItemsRequested事件:
private void rpt_ItemDataBound(object sender, RepeaterItemEventArgs e) {
RadComboBox rcb = (RadComboBox)e.Item.FindControl("rcb");
rcb.ItemsRequested += rcb_ItemsRequested;
}
private void rcb_ItemsRequested(object o, RadComboBoxItemsRequestedEventArgs e) {
// Database call to load items occurs here.
// As configured, this method is never called.
}
目前,从不调用服务器端rcb_ItemsRequested方法。我怀疑在ItemDataBound中连接ItemsRequested事件是有问题的,但问题可能出在其他地方。
有关如何在转发器中正确使用Telerik RadComboBox的任何想法吗?
答案 0 :(得分:1)
您是否尝试将事件处理程序接线放在标记中而不是动态添加?
另外 - 你可能知道,但以防万一 - ItemsRequested是一个只在某些条件下触发的事件。引用文档:
The ItemsRequested event occurs when the EnabledLoadOnDemand property is True and the user types text into the input field or clicks on the drop-down toggle image when the list is empty.
- Reference
您的方案是否与上述相符?
修改强>:
我测试了一些代码。以下工作(ItemsRequested事件触发所有ComboBoxes并将三个测试项添加到动态下拉列表中..):
标记:
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:Repeater ID="rpt" runat="server" OnItemDataBound="rpt_ItemDataBound">
<ItemTemplate>
<br />
<telerik:RadComboBox ID="rcb" runat="server" EnableLoadOnDemand="true" AllowCustomText="true"
ItemRequestTimeout="1000" NumberOfItems="10" MarkFirstMatch="false" />
</ItemTemplate>
</asp:Repeater>
</form>
代码背后的代码:
protected void Page_Load(object sender, EventArgs e)
{
List<string> data = new List<string>();
data.Add("Item 1");
data.Add("Item 2");
//add some items to the repeater to force it to bind and repeat..
rpt.DataSource = data;
rpt.DataBind();
}
protected void rpt_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
//wire the event
RadComboBox rcb = (RadComboBox)e.Item.FindControl("rcb");
rcb.ItemsRequested += rcb_ItemsRequested;
}
protected void rcb_ItemsRequested(object sender, RadComboBoxItemsRequestedEventArgs e)
{
//add the items when requested.
(sender as RadComboBox).Items.Add(new RadComboBoxItem("Item1", "1"));
(sender as RadComboBox).Items.Add(new RadComboBoxItem("Item2", "2"));
(sender as RadComboBox).Items.Add(new RadComboBoxItem("Item3", "3"));
}