如何作爲字符串加入類的屬性？

Question

「我有一個屬性的對象的列表‘CustomizationName’

我想用逗號加入該財產，即價值觀，這樣的事情：

List<MyClass> myclasslist = new List<MyClass>(); 
myclasslist.Add(new MyClass { CustomizationName = "foo"; }); 
myclasslist.Add(new MyClass { CustomizationName = "bar"; }); 
string foo = myclasslist.Join(",", x => x.CustomizationName); 
Console.WriteLine(foo); // outputs 'foo,bar' 

Answer 1

string foo = String.Join(",", myClasslist.Select(m => m.CustomizationName).ToArray()); 

如果你想，你可以把它變成一個擴展方法：

public static class Extensions 
{ 
    public static string ToDelimitedString<T>(this IEnumerable<T> source, Func<T, string> func) 
    { 
     return ToDelimitedString(source,",",func); 
    } 

    public static string ToDelimitedString<T>(this IEnumerable<T> source, string delimiter, Func<T, string> func) 
    { 
     return String.Join(delimiter, source.Select(func).ToArray()); 
    } 
} 

用法：

public class MyClass 
{ 
    public string StringProp { get; set; } 
} 

.....

 var list = new List<MyClass>(); 
     list.Add(new MyClass { StringProp = "Foo" }); 
     list.Add(new MyClass { StringProp = "Bar" }); 
     list.Add(new MyClass { StringProp = "Baz" }); 

     string joined = list.ToDelimitedString(m => m.StringProp); 
     Console.WriteLine(joined);