Select Item in DropDownList with value from database and display default value if does not exist

hi 

i have dropdown list in my page

 BindDropDownList(DdlDistrict, "District1", "District", "ID");
 DdlDistrict.Items.Insert(0, new ListItem("select district", "0"));

and i use this code for binding from database 

 DdlDistrict.Items.FindByText(_dr["District"].ToString()).Selected = true;

here if in database have value it show in ddldistrict 

now i want if there wasn't any thing in database in dropdown list show  "select district"  that i define here 

 DdlDistrict.Items.Insert(0, new ListItem("select district", "0"));

thanks alot