I Have A 3 Items In Drop Downlist Such As Admin User And Supervisor. I Want To Write A Code So That No One Will Delete My Admin Item

Hai

Try like this,i think u delete data form table and rebind dropdown,

Delete from Department where Dept <> "Admin"

if (DropDownList1.Text == "Administrator")
       {

       //Leave it as empty

       }
       else
       {
           DropDownList1.Items.Remove(DropDownList1.SelectedItem);
           con.Open();
           string query ="Delete from Role1 Where Role_Name ='" + DropDownList1.Text +"'";
           SqlCommand cmd = new SqlCommand(query, con);
           cmd.ExecuteNonQuery();
           con.Close();
       }

I don't know what u exact needs,in dropdownbox u remove select item only,but in Role1 table u remove all data excluding Administrator.

How to bind data in dropdownbox ? in design time u add items or dynamically bind data form table.If u bind data from table dynamically to dropdownbox then try below code

if (DropDownList1.Text == "Administrator")
       {

       //Leave it as empty

       }
       else
       {
          // DropDownList1.Items.Remove(DropDownList1.SelectedItem);
           con.Open();
           string query ="Delete from Role1 Where Role_Name ='" + DropDownList1.Text +"'";
           SqlCommand cmd = new SqlCommand(query, con);
           cmd.ExecuteNonQuery();
           con.Close();
         Binddropdown();//Here u call the code to bind data to dropdownbox
       }

I think how u know to bind data to dropdownbox dynamically in Bind dropdown function u write code to bind data like dropdownlist1.ds; dropdownlist1.bind ect...
Regards
Aravind

Dont let all users to delete the datas. Instead of that, give full rights only to Admin.