JavaScriptSerializer:对象引用没有设置为对象的实例

本文关键字：对象 实例 设置 对象引用 JavaScriptSerializer | 更新日期: 2023-09-27 18:12:37

我哪里做错了?

using System.Web.Script.Serialization;
string json = "{'"numbers'":[{'"one'":'"1'"},{'"two'":'"2'"},{'"three'":'"3'"}]}";
dynamic dictionary = new JavaScriptSerializer().Deserialize<dynamic>(json);
Assert.AreEqual(3, dictionary["numbers"].Count);
System.NullReferenceException : Object reference not set to an instance of an object
  at System.Web.Script.Serialization.JavaScriptSerializer.ConvertToObject (IDictionary`2 dict, System.Type type) [0x00000] in <filename unknown>:0 
  at System.Web.Script.Serialization.JavaScriptSerializer.ConvertToType (System.Type type, System.Object obj) [0x00000] in <filename unknown>:0 
  at System.Web.Script.Serialization.JavaScriptSerializer.ConvertToList (System.Collections.ArrayList col, System.Type type) [0x00000] in <filename unknown>:0 
  at System.Web.Script.Serialization.JavaScriptSerializer.ConvertToType (System.Type type, System.Object obj) [0x00000] in <filename unknown>:0 
  at System.Web.Script.Serialization.JavaScriptSerializer.ConvertToObject (IDictionary`2 dict, System.Type type) [0x00000] in <filename unknown>:0 
  at System.Web.Script.Serialization.JavaScriptSerializer.ConvertToType (System.Type type, System.Object obj) [0x00000] in <filename unknown>:0 
  at System.Web.Script.Serialization.JavaScriptSerializer.ConvertToType[Object] (System.Object obj) [0x00000] in <filename unknown>:0 
  at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize[Object] (System.String input) [0x00000] in <filename unknown>:0

JavaScriptSerializer:对象引用没有设置为对象的实例

我看你的代码没有问题，除了使用count属性，而且由于json被反序列化时代码会中断，我建议你使用静态类型定义代替，只是为了缩小问题的变化与你的代码:

        string json = "{'"numbers'":[{'"one'":'"1'"},{'"two'":'"2'"},{'"three'":'"3'"}]}";
        var dictionary = new JavaScriptSerializer().Deserialize<Dictionary<string, object>>(json);

也许只是也许在JavaScriptSerializer中使用动态类型存在问题，如果JavaScriptSerializer确实存在问题，您可以随时向MSFT报告。

由于我不能使Dictionary<string, object>工作，我决定放弃它并使用静态类型代替。顺便说一句，这个在线工具非常方便，可以从JSON生成c#类。

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