zh.Username = dt.Rows[0]["username"].ToString().Trim();
zh.Password = dt.Rows[0]["password"].ToString().Trim();
// zh.Username.Trim();
// zh.Password.Trim();
zh.Password = dt.Rows[0]["password"].ToString().Trim();
// zh.Username.Trim();
// zh.Password.Trim();
zh.Username = zh.Username.Trim();
zh.Password = zh.Password.Trim();Trim()方法需要接收返回值
zh.Username = dt.Rows[0]["username"].ToString().Trim();
zh.Password = dt.Rows[0]["password"].ToString().Trim();
// zh.Username.Trim();
// zh.Password.Trim();
如果想把中间的空格也去掉的话,用replace(" ","")吧
zh.Username = zh.Username.Trim();
两种都可以