c# - 将条件传递给 Tuple<string, string, Func<bool>> 的 Func<bool>

Question

我正在尝试创建一个元组列表，其中包含用于验证的属性和条件。所以我想到了这个想法:

List<Tuple<string, string, Func<bool>>> properties = new List<Tuple<string, 
                                                                    string,
                                                                    Func<bool>>> 
{
    Tuple.Create(FirstName, "User first name is required", ???),
};
...

如何将类型为 (FirstName == null) 的表达式作为 Func 传递？

Answer 1

像这样(使用 lambda expression ):

var properties = new List<Tuple<string, string, Func<bool>>> 
{
    Tuple.Create<string, string, Func<bool>>(
                 FirstName, 
                 "User first name is required",
                 () => FirstName == null),
};