This article will show you how to have an item which checks/unchecks all items.
Select All OR Un Select All - sing Rad Combo / List Box Control
The aspx File
<script language="javascript" type="text/javascript">
function OnClientItemChecked(sender, eventArgs) {
var lstBoxControl;
lstBoxControl = $find(sender.get_id());
var items = lstBoxControl.get_items();
if (eventArgs.get_item().get_index() == 0) {
var firstIndex = eventArgs.get_item().get_checked();
for (var i = 0; i < lstBoxControl.get_items().get_count(); i++) {
items.getItem(i).set_checked(firstIndex);
}
}
else {
items.getItem(0).set_checked(false);
}
}
</script>
<telerik:RadListBox AppendDataBoundItems="true"
TabIndex="1"
Width="200px"
CheckBoxes="true"
ID="lstClassificationTypes" DataSourceID="dataClassificationTypes"
runat="server"
DataTextField="SelectionName"
DataValueField="SelectionId"
OnClientItemChecked="OnClientItemChecked">
<Items>
<telerik:RadListBoxItem Text="Select / UnSelect
All" Value=0
BackColor=Gray Font-Bold="true"
ForeColor=White />
</Items>
</telerik:RadListBox>
The aspx.cs File
Find Selected Item
protected void btnGenerate_Click(object sender, EventArgs e)
{
StringBuilder sb = new StringBuilder();
IList<RadListBoxItem> collection = ((RadListBox)fview.FindControl("lstClassificationTypes")).CheckedItems;
foreach (RadListBoxItem item in collection)
{
// Your Code Here >> item.Value
}
}
If you need additional assistance, do not hesitate to contact me.@ tkjagadheesh@gmail.com
Regards,
JAG
Tags: RadListBox, C#, CheckBox, Java Script, Multiple Items, ASP.NET, AJAX, Rad Controls check all, Un check all, Select all, Multi Select Combo, MultiSelect List Box
