public void sua(string key, string chucvu)
{
dmchucvu cv = (from a in dbData.dmchucvus select a).Single(t => t.key == key);
cv.chucvu = chucvu;
dbData.SubmitChanges();
}
public void xoa(string key)
{
dmchucvu cv = (from a in dbData.dmchucvus select a).Single(t => t.key == key);
dbData.dmchucvus.DeleteOnSubmit(cv);
dbData.SubmitChanges();
}
public void them(string key, string id, string chucvu)
{
dmchucvu cv = new dmchucvu();
cv.key = key;
cv.id = id;
cv.chucvu = chucvu;
dbData.dmchucvus.InsertOnSubmit(cv);
dbData.SubmitChanges();
}