c# - 检索布尔值作为文本

Question

在我的应用程序中，我有一个存储为布尔值的值。在网格视图中显示时，如何将该布尔值更改为文本。

我有这个 sql

SELECT     Driver.FirstName + Driver.LastName AS DriverName, Driver.PhoneNumber, 
           Booking.BookingId, Booking.DriverRating, Driver.CarId AS CarUsed 
FROM       Booking 
INNER JOIN Driver ON Booking.DriverId = Driver.DriverId 
WHERE      Booking.DriverRating = 0

我正在检索所有错误（0）的驾驶员评分。现在，当我将它显示到网格视图时，我想将布尔值 false 更改为不令人满意。

我怎样才能在sql查询中做到这一点？

Answer 1

Booking.DriverRating -> 案例 Booking.DriverRating 当 0 时为 'Unsatisfactory' 否则 'Satisfactory' 以 'Booking.DriverRating' 结尾

Answer 2

如何从服务器检索它作为开始的字符串？

例如

SELECT Driver.FirstName + Driver.LastName AS DriverName, Driver.PhoneNumber, Booking.BookingId,
 Case Booking.DriverRating When 0 then 'Unsatisfactory' else 'Satisfactory' end as DriverRating,   
Driver.CarId AS CarUsed 
FROM Booking 
INNER JOIN Driver ON Booking.DriverId = Driver.DriverId 
WHERE (Booking.DriverRating = 0)

或者在您的情况下，因为您已经在使用 where 子句：

SELECT Driver.FirstName + Driver.LastName AS DriverName, Driver.PhoneNumber, Booking.BookingId, 
    'Unsatisfactory' as DriverRating,
    Driver.CarId AS CarUsed 
FROM Booking INNER JOIN Driver ON Booking.DriverId = Driver.DriverId 
WHERE (Booking.DriverRating = 0)