sql.Add('select * from tuser where login='landingfrm.landedt1.Text'');////////////////////////是取landingfrm.landedt1.Text的值吗?sql.Add('select * from tuser where login='''+landingfrm.landedt1.Text+'''');试试
ONE: sql.Add('select * from tuser where login='+quotedstr(landingfrm.landedt1.Text));TWO: sql.Add('select * from tuser where login='+char(39)+landingfrm.landedt1.Text+char(39));这样可以了哈
建议你用 Quotedstr 这个比较好你的那种 '''' 容易出错,而且代码不好看