public Form1()
{
InitializeComponent();
DataTable t = new DataTable();
t.Columns.Add("ID", typeof(int));
t.Columns.Add("Name", typeof(string));
t.Rows.Add(1, "one");
t.Rows.Add(2, "two");
t.Rows.Add(3, "three");
t.Rows.Add(4, "four");
t.Rows.Add(5, "five");
t.Rows.Add(6, "six");
t.Rows.Add(7, "seven");
t.Rows.Add(8, "eight");
t.Rows.Add(9, "nine");
t.Rows.Add(10, "ten");
CustomDropDownList list = new CustomDropDownList();
list.Name = "MyDropDown";
list.Location = new Point(130, 80);
list.Size = new System.Drawing.Size(230, 20);
Controls.Add(list);
list.DisplayMember = "Name";
list.ValueMember = "ID";
list.DataSource = t;
list.SelectedIndexChanged += list_SelectedIndexChanged;
}
private void list_SelectedIndexChanged(object sender, Telerik.WinControls.UI.Data.PositionChangedEventArgs e)
{
if (e.Position > -1)
{
CustomDropDownList list = sender as CustomDropDownList;
((CustomListDataItem)list.Items[e.Position]).Checked = true;
((CustomEditorElement)list.DropDownListElement).SynchronizeText();
}
}
private void Form1_Load(object sender, EventArgs e)
{
CustomDropDownList ddl = this.Controls["MyDropDown"] as CustomDropDownList;
((CustomListDataItem)ddl.DropDownListElement.ListElement.SelectedItem).Checked = false;
((CustomListDataItem)ddl.DropDownListElement.ListElement.SelectedItem).Selected = false;
LightVisualElement lve = ddl.DropDownListElement.EditableElement.Children[1] as LightVisualElement;
lve.Text = string.Empty;
ddl.Items[1].Selected = true;
}
