向Expandoobjects添加方法

你确定你包含了所有的代码吗?

我刚刚测试并运行了以下各项,并取得了成功:

dynamic obj = new ExpandoObject();

obj.First = "Hello";
obj.Last = "World!";

obj.AsString = new Func<string>(() => obj.First + " " + obj.Last);

// Displays "Hello World!"
Console.WriteLine(obj.AsString());

编译器会抱怨

myObj.AsString; // only assignment, call, increment, decrement, and new object expressions can be used as a statement

所以把它扔掉。当然,去掉你所说的不编译的代码行。但是,一旦这些位被修复,其余的代码就可以工作了。示例(加上添加另一个“方法”):

dynamic myObj = new ExpandoObject();
myObj.First = "Stack";
myObj.Last = "Overflow";

Action<int> PrintInt = input => Console.WriteLine(input.ToString());
myObj.PrintInt = PrintInt;
myObj.PrintInt(1);

myObj.AsString = new Func<string>(() => myObj.First + " " + myObj.Last);
string s = myObj.AsString();
Console.WriteLine(s);