我该如何在ExpandoObject中设置一个键为保留字的属性呢?
像这样:
dynamic query = new ExpandoObject();
query.size = 10;
query.date = "2017-04-27";
dynamic match = new {
query = query,
bool = true
}
我该如何在ExpandoObject中设置一个键为保留字的属性呢?
像这样:
dynamic query = new ExpandoObject();
query.size = 10;
query.date = "2017-04-27";
dynamic match = new {
query = query,
bool = true
}
ExpandoObject
中,您可以使用任何字符串值作为属性名称(包括保留字、空格等,甚至是空字符串),通过将ExpandoObject
实例转换为IDictionary<string, object>
来实现:dynamic query = new ExpandoObject();
(query as IDictionary<string, object>)["bool"] = true;
(query as IDictionary<string, object>)[" b o o (g)? l \"e:)\""] = false;
(query as IDictionary<string, object>)[""] = true;
但是你不能使用“普通C#语法”(即obj.prop
)来访问这些属性。你需要将对象转换为IDictionary<string, object>
并使用索引器来访问它们:
var qDict = query as IDictionary<string, object>;
Console.WriteLine(qDict["bool"]);
Console.WriteLine(qDict[" b o o (g)? l \"e:)\""]);
Console.WriteLine(qDict[""]);
// Prints:
// True
// False
// True