如何将C#/.NET 将json字符串格式数据转换成对象

时间：2023-01-02 10:08:59

网络中数据的传输方式通常是json格式，对于.NET程序json数据很不方便，因此我们需要将json格式数组转换成对象，有的是字符串属性简单对象，有的需要将json格式字符串转换为对象中还有对象的对象，有的却是要将json格式字符串转换为List对象。下面讲解对json数据转换成对象的操作。

json中包含的是只有字符串的简单对象

比如：

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{"result":"0","res_info":"ok","queryorder_info":"info"}

首先构造对象,如下面的代码

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public struct JsonClass
{
public string result { get; set; }  //属性的名字，必须与json格式字符串中的"key"值一样。
public string res_info { get; set; }
public string queryorder_info { get; set; }   
}

将json字符串转换为JsonClass对象，将json字符放在json1.txt文本中

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public static void JsonMy()
{
string json = Jsonstr("D:\\temp\\json1.txt");//Jsonstr函数读取json数据的文本txt                      　　　　　　 
JavaScriptSerializer js = new JavaScriptSerializer();   //实例化一个能够序列化数据的类
JsonClass list = js.Deserialize<JsonClass>(json);    //将json数据转化为对象类型并赋值给list
string result = list.result;                  　　　　　　　
string res_info = list.res_info;
string queryorder_info = list.res_info;
}

对于注意JavaScriptSerializer对象要引用System.Web.Extensions

json字符串中的对象还包含对象

json格式字符串示例如下：

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{"result":"0","res_info":"ok","queryorder_info":{"order_num":"5","orderdetail":"ok"}}

构造对象

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public struct JsonClass2
{
public string result { get; set; }  
public string res_info { get; set; }
public queryorder_info queryorder_info;
}
 
public struct queryorder_info
{
public string order_num { get; set; }
public string orderdetail { get; set; }
};

转换对象，将json字符放在json2.txt文本中

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public static void JsonMy2()
{
string json = Jsonstr("D:\\temp\\json2.txt");
JavaScriptSerializer js = new JavaScriptSerializer();   //实例化一个能够序列化数据的类
JsonClass2 list = js.Deserialize<JsonClass2>(json);    //将json数据转化为对象类型并赋值给list
string result = list.result;    
string res_info = list.res_info;
string order_num = list.queryorder_info.order_num;
string orderdetail = list.queryorder_info.orderdetail;
}

json数据中还包含数组对象集合

示例json字符串

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{"result":"0","res_info":"ok","queryorder_info":
{"order_num":"5","orderdetail":[
{"Description":"769839263","CancelDeadline":"2013-09-12 23:00:00","CheckInDate":"2013-09-12 00:00:00","CheckOutDate":"2013-09-13 00:00:00","CityID":"0101","CurrencyCode":"RMB","HotelID":"00301105","Name":"有间客栈","ID":"1000000005201308280002999652","PayAmt":"228","PayType":"0","RommsCnt":"1","SPTransID":"65202157","Address":"4"},
{"Description":"248486133","CancelDeadline":"2013-10-13 23:00:00","CheckInDate":"2013-10-13 00:00:00","CheckOutDate":"2013-10-18 00:00:00","CityID":"0201","CurrencyCode":"RMB","HotelID":"10201314","Name":"七天酒店","ID":"1000000005201308280002999413","PayAmt":"1140","PayType":"0","RommsCnt":"1","SPTransID":"65197226","Address":"4"}]}}

构造对象

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public struct JsonClass3
{
public string result { get; set; } 
public string res_info { get; set; }
public queryorder_info queryorder_info;
}
public struct queryorder_info
{
public string order_num { get; set; }
public List<orderdetail> orderdetail;//数组处理       
};
public struct orderdetail
{
public string Description { get; set; }
public string CancelDeadline { get; set; }
public string CheckInDate { get; set; }
public string CheckOutDate { get; set; }
public string CityID { get; set; }
public string CurrencyCode { get; set; }
public string HotelID { get; set; }
public string Name { get; set; }
public string ID { get; set; }
public string PayAmt { get; set; }
public string PayType { get; set; }
public string RommsCnt { get; set; }
public string SPTransID { get; set; }
public string Address { get; set; }
};

转换对象，，将json字符放在json3.txt文本中

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public static void JsonMy3()
{
string json = Jsonstr("D:\\temp\\json3.txt");
JavaScriptSerializer js = new JavaScriptSerializer();   //实例化一个能够序列化数据的类
JsonClass3 list = js.Deserialize<JsonClass3>(json);    //将json数据转化为对象类型并赋值给list
string result = list.result;     
string res_info = list.res_info;
string order_num = list.queryorder_info.order_num;
List<orderdetail> orderdetail = list.queryorder_info.orderdetail;
string Description = orderdetail[0].Description;
string Name = orderdetail[0].Name;
string ID = orderdetail[1].ID;
string Address = orderdetail[2].Address;
}

以上就是关于json字符串转对象的全部，希望可以帮助你。

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