如何在内插字符串中使用三元运算符？
How to use the ternary operator inside an interpolated string?
我很困惑为什么这段代码无法编译：
var result = $"{fieldName}{isDescending ? " desc" : string.Empty}";
如果我把它分开，效果很好：
var desc = isDescending ? " desc" : string.Empty;
var result = $"{fieldName}{desc}";
根据 documentation:
The structure of an interpolated string is as follows:
{ <interpolationExpression>[,<alignment>][:<formatString>] }
问题是冒号是用来表示格式的，比如：
Console.WriteLine($"The current hour is {hours:hh}")
解决方法是把括号中的条件包裹起来：
var result = $"Descending {(isDescending ? "yes" : "no")}";
我很困惑为什么这段代码无法编译：
var result = $"{fieldName}{isDescending ? " desc" : string.Empty}";
如果我把它分开，效果很好：
var desc = isDescending ? " desc" : string.Empty;
var result = $"{fieldName}{desc}";
根据 documentation:
The structure of an interpolated string is as follows:
{ <interpolationExpression>[,<alignment>][:<formatString>] }
问题是冒号是用来表示格式的，比如：
Console.WriteLine($"The current hour is {hours:hh}")
解决方法是把括号中的条件包裹起来：
var result = $"Descending {(isDescending ? "yes" : "no")}";