Hello Vamsna,
You just take label at which you want to display that company name.
Then create drop down selected index change event and make auto postback event of dropdown true then write code to print your selected company name at you label like this:
Write this code in .aspx
<asp:DropDownList ID="ddl" OnSelectedIndexChanged="ddl_SelectedIndexChange" runat="server" AutoPostBack="True">
</asp:DropDownList>
Write this code in .cs:
protected void ddl_SelectedIndexChange(object sender, EventArgs e)
{
lbl.text=ddl.SelectedItem.Text
}
Accepts as answer and vote if help to you.