A checkboxdropdownlist is used to filter data for a chart. After the initial load of list items the first item in the list is selected - even though it is not checked. Turning it off in code doesn't work either.
for (i = 0; i < theRoot.ChildNodes.Count; i++){ ServerName = theRoot.ChildNodes[i].Attributes["Name"].Value; foreach (XmlNode aNode in theRoot.ChildNodes[i]) { if (aNode.InnerText == Environment) { sb = new StringBuilder(); sb.Append(ServerName.Replace("XX", aNode.InnerText)); lItem = new Item(j, sb.ToString()); lvServers.Add(lItem); j++; } }}rcddlServers.DataSource = lvServers;rcddlServers.ValueMember = "id";rcddlServers.DisplayMember = "description";rcddlServers.DropDownListElement.SelectionMode = SelectionMode.MultiSimple;if (rcddlServers.SelectedItems.Count > 0) --> why is this possible?{ rcddlServers.Items[0].Checked = false;}2 Answers, 1 is accepted
Hello Marianne,
When you have a data-bound RadCheckedDropDownList (DataSource property is set to some data source), the first item in the collection is selected after the initial loading and this is normal behavior. If you want to remove the initially selected item you can set the SelectedIndex property of the control to -1. It is good to happen in the Load event of the form:
private void RadForm1_Load(object sender, EventArgs e)
{
this.radCheckedDropDownList1.CheckedDropDownListElement.SelectedIndex = -1;
}
I hope this helps. Should you have other questions do not hesitate to ask.
Regards,
Nadya
Progress Telerik
Our thoughts here at Progress are with those affected by the outbreak.
Rank 1
Veteran
yes that fixed it