Deserialize然后Nullable类型DateTimeOffset？抛出异常 [英] When Deserialize then Nullable type DateTimeOffset? throw exception

问题描述

我的开发平台是Win7，VS.Net 2010，C＃。

当我使用fastJSON.JSON在可空类型DateTimeOffset？时序列化自定义类时，它可以，但是当它反序列化序列化字符串，即fastJSON抛出异常。



fastJSON的版本是v2.0.10。

你可以测试它，当你定义一个DateTimeOffset？属性并设置DateTime.Now值。

当使用fastJSON.JSON.Instance.ToJSON（）方法时它没关系，但是当使用fastJSON.JSON.Instance.ToObject（）方法时，它抛出异常：无法将类型System.Collections.Generic.Dictionary`2 [System.String，System.Object]转换为类型System.String

解决方案

测试类是这样的：

  public   static   class 测试
 {
  public   static  testclass Create（）
 {
 RefClass2 oRef =  new  RefClass2（）
 { 
 Class2ID =  ，id2，，
 Class2Name =   name2 
}; 
 RefClass2 oRef2 =  new  RefClass2（）
 {
 Class2ID =   id3，
 Class2Name =   name3  
}; 
 RefClass1 oTeacher =  new  RefClass1（）
 {
 Class1ID =   id1，
 Class1Name =   name1 ，
 Class1ObjType = EnumObj1.A，
 RefClass = oRef 
}; 
 RefClass1 oTeacher2 =  new  RefClass1（）
 {
 Class1ID =   \id4 \，
 Class1Name =   name4，
 Class1ObjType = EnumObj1.B，
 RefClass = oRef2 
}; 
 testclass oRet =  new  testclass（）
 {
 Name =   xiao ming，
年龄=  16 ，
 ShirtColor = ConsoleColor.Blue ，
 Mode = StartMode.Manual，
 PreviewExecuteionTime =  null ，
 NextExecuteionTime = DateTime.Now，
 Teachers = < span class =code-keyword> new  RefClass1 [ 2 ] {oTeacher，oTeacher2} 
}; 
  return  oRet; 
} 
} 
 
  public   class  testclass 
 {
  public   string 名称{获得;  set ; } 
 
  public   int 年龄{获得;  set ; } 
 
  public   string 学校{获得;  private   set ; } 
 
  public  ConsoleColor ShirtColor { get ;  set ; } 
 
  public  StartMode模式{ get ; 设置;} 
 
  public   string  ModeText 
 {
  get  
 {
  if （Mode = = StartMode.Auto）
 {
  return    0; 
} 
  return    1 ; 
} 
} 
 
  public  DateTimeOffset？ PreviewExecuteionTime { get ;  set ; } 
 
  public  DateTimeOffset？ NextExecuteionTime { get ;  set ; } 
 
  public  RefClass1 []教师{获取;  set ; } 
} 
 
  public   enum  StartMode 
 { 
 Auto =  0 ，
手动=  1  
} 
 
  public   class  RefClass1 
 {
  public   string  Class1ID { get ;  set ; } 
 
  public   string  Class1Name {获得;  set ; } 
 
  public  EnumObj1 Class1ObjType { get ;  set ; } 
 
  public  RefClass2 RefClass { get ;  set ; } 
} 
 
  public   class  RefClass2 
 { 
  public   string  Class2ID { get ;  set ; } 
 
  public   string  Class2Name {获得;  set ; } 
} 
 
  public   enum  EnumObj1 
 { 
 A =  0 ，
 B =  1  
} 

调用Test.Create（）静态方法可以创建测试对象。<​​/ blockquote>

My develop platform is Win7,VS.Net 2010,C#.
When I using the fastJSON.JSON to serialize a custom class when the nullable type DateTimeOffset?,it is OK,but when it deserialize the serialized string,the fastJSON throw exception.

the fastJSON ‘s version is v2.0.10.
you can test it,when you define a DateTimeOffset? Property and set a DateTime.Now value.
when use fastJSON.JSON.Instance.ToJSON() method it''s ok,but when use fastJSON.JSON.Instance.ToObject() method,it throw a exception:can not convert the type"System.Collections.Generic.Dictionary`2[System.String,System.Object]"to type"System.String"

解决方案

the test class is like this :

public static class Test
    {
        public static testclass Create()
        {
            RefClass2 oRef = new RefClass2()
            {
                Class2ID = ",id2,",
                Class2Name = "name2"
            };
            RefClass2 oRef2 = new RefClass2()
            {
                Class2ID = "id3",
                Class2Name = "name3"
            };
            RefClass1 oTeacher = new RefClass1()
            {
                Class1ID = "id1",
                Class1Name = "name1",
                Class1ObjType = EnumObj1.A,
                RefClass = oRef
            };
            RefClass1 oTeacher2 = new RefClass1()
            {
                Class1ID = "\"id4\"",
                Class1Name = "name4",
                Class1ObjType = EnumObj1.B,
                RefClass = oRef2
            };
            testclass oRet = new testclass()
            {
                Name = "xiao ming",
                Age = 16,
                ShirtColor = ConsoleColor.Blue,
                Mode = StartMode.Manual,
                PreviewExecuteionTime = null,
                NextExecuteionTime = DateTime.Now,
                Teachers = new RefClass1[2] { oTeacher, oTeacher2 }
            };
            return oRet;
        }
    }

    public class testclass
    {
        public string Name { get; set; }

        public int Age { get; set; }

        public string School { get; private set; }

        public ConsoleColor ShirtColor { get; set; }

        public StartMode Mode{get;set;}

        public string ModeText
        {
            get
            {
                if (Mode == StartMode.Auto)
                {
                    return "0";
                }
                return "1";
            }
        }

        public DateTimeOffset? PreviewExecuteionTime { get; set; }

        public DateTimeOffset? NextExecuteionTime { get; set; }

        public RefClass1[] Teachers { get; set; }
    }

    public enum StartMode
    {
        Auto = 0,
        Manual = 1
    }

    public class RefClass1
    {
        public string Class1ID { get; set; }

        public string Class1Name { get; set; }

        public EnumObj1 Class1ObjType { get; set; }

        public RefClass2 RefClass { get; set; }
    }

    public class RefClass2
    {
        public string Class2ID { get; set; }

        public string Class2Name { get; set; }
    }

    public enum EnumObj1
    {
        A = 0,
        B = 1
    }

invoke the Test.Create() static method can create a testing object.

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