foreach (Control ctrl in this.Controls)<br />
{<br />
<br />
if (ctrl.GetType().Name == "ComboBox")<br />
{<br />
ComboBox cmb = (ComboBox)ctrl;<br />
cmb.DataSource = dt1;<br />
cmb.DataTextField = "vehicle_name";<br />
cmb.DataValueField = "vehicle_id";<br />
cmb.DataBind();<br />
}<br />
}<br />
Use this if you want to fill same data in all you ddl on a form..
else use some condition like name checking etc..