給DropDownList賦值

if(!Page.IsPostBack) 
{ 
string sql = "select ID,Name from type"; 
DataTable dt = mydb.dataTable(sql); 
DropdownlistID.DataSource = dt.DefaultView; 
DropdownlistID.DataValueField = "ID"; 
DropdownlistID.DataTextField = "Name"; 
DropdownlistID.DataBind(); 
DropdownlistID.Items.Insert(0, new ListItem("全部", "0")); 
DropdownlistID.SelectedIndex = 0; 
}