DropDownList Program in ASP.Net

[mansi sharma]

There are two dropDownLists on my form. In one DropDownList items
are-
1)BE
2)Drawing
3)PG

I want if a user selects BE in dropdownlist3 then in dropDownlist4 items are
IT, CSE, MECH


I want if a user selects Drawing in dropdownlist3 then in dropDownlist4 items are
Drawing1, Drawing2


I want if a user selects PG in dropdownlist3 then in dropDownlist4 items are
MBA, MSC, MCA

I do the foll. coding,but errors are there--
Check it out--

public partial class _Default : System.Web.UI.P age
{
protected void Page_Load(objec t sender, EventArgs e)
{
DropDownList3.I tems.Clear();
DropDownList3.I tems.Add("BE");
DropDownList3.I tems.Add("Drawi ng");
DropDownList3.I tems.Add("PG");
}
protected void DropDownList3_S electedIndexCha nged(object sender, EventArgs e)
{
if (DropDownList3. SelectedItem ="BE")
{
DropDownList4.I tems.Clear();
DropDownList4.I tems.Add("IT");
DropDownList4.I tems.Add("CSE") ;
DropDownList4.I tems.Add("MECH" );
}
else if (DropDownList3. SelectedItem ="Drawing")
{
DropDownList4.I tems.Clear();
DropDownList4.I tems.Add("Drawi ng 1");
DropDownList4.I tems.Add("Drawi ng 2");
}
else
{
DropDownList4.I tems.Clear();
DropDownList4.I tems.Add("MBA") ;
DropDownList4.I tems.Add("MSC") ;
DropDownList4.I tems.Add("MCA") ;

}
}
}

But Its not working.

[nateraaaa]

What error are you getting back from your application?

Nathan

[mansi sharma]

Error Operator '==' cannot be applied to operands of type 'System.Web.UI. WebControls.Lis tItem'

[nateraaaa]

Error Operator '==' cannot be applied to operands of type 'System.Web.UI. WebControls.Lis tItem'

Your conditional statements (if and else if) must compare using the == operator.

 if(dropdown1.SelectedValue == "BE") 
{
//do something
}

Nathan