c# - 如何动态引用 ExpandoObject 中的字段？

Question

有没有办法使用“IDictionary”样式查找动态访问扩展的属性？

var messageLocation = "Message";
dynamic expando = new ExpandoObject();
expando.Message = "I am awesome!";
Console.WriteLine(expando[messageLocation]);

Answer 1

您必须将其ExpandoObject转换为IDictionary<string, object>：

var messageLocation = "Message";
dynamic expando = new ExpandoObject();
expando.Message = "I am awesome!";

var expandoDict = (IDictionary<string, object>)expando;
Console.WriteLine(expandoDict[messageLocation]);

（还必须键入您的 expando 变量，dynamic以便在运行时确定属性访问 - 否则您的示例将无法编译）