public static OptionBuilder ByBirthDate(this OptionBuilder builder, DateTime birthDate)
{
if (builder == null)
{
builder = new OptionBuilder();
}
builder.IsByBirthDate = true;
builder.BirthDate = birthDate;
return(builder);
}
public static OptionBuilder ByName(this OptionBuilder builder, string name)
{
if (builder == null)
{
builder = new OptionBuilder();
}
builder.IsByName = true;
builder.Name = name;
return(builder);
}
public static OptionBuilder ByAge(this OptionBuilder builder, int age)
{
if (builder == null)
{
builder = new OptionBuilder();
}
builder.IsByAge = true;
builder.Age = age;
return(builder);
}
public static List <Person> GetPerson(OptionBuilder builder)
{
var lst = new List <Person>();
bool isNullBuilder = !builder.IsByName && !builder.IsByBirthDate && !builder.IsByAge;
if (isNullBuilder)
{
return(new List <Person>());
}
if (builder.IsByAge)
{
lst = List.FindAll(x => x.Age == builder.Age);
}
if (builder.IsByName)
{
if (lst.IsNullOrEmpty())
{
lst = List.FindAll(x => x.Name == builder.Name);
}
else
{
lst = lst.FindAll(x => x.Name == builder.Name);
}
}
if (builder.IsByBirthDate)
{
if (lst.IsNullOrEmpty())
{
lst = List.FindAll(x => x.BirthDate == builder.BirthDate);
}
else
{
lst = lst.FindAll(x => x.BirthDate == builder.BirthDate);
}
}
return(lst);
}
public static void Run()
{
List.Add(new Person {
Name = "A", Age = 22, BirthDate = new DateTime(2017, 11, 22)
});
List.Add(new Person {
Name = "B", Age = 11, BirthDate = new DateTime(1993, 11, 22)
});
List.Add(new Person {
Name = "C", Age = 12, BirthDate = new DateTime(2000, 11, 22)
});
List.Add(new Person {
Name = "D", Age = 62, BirthDate = new DateTime(2014, 11, 22)
});
List.Add(new Person {
Name = "E", Age = 73, BirthDate = new DateTime(1990, 11, 22)
});
var builder = OptionBuilder.Create();
var persons = GetPerson(builder.ByAge(22).ByName("A"));
}