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詳解C#對XML、JSON等格式的解析

來源：本站原創(chuàng)|時(shí)間：2020-01-10|欄目：C#教程|點(diǎn)擊： 次

一、C#對XML格式數(shù)據(jù)的解析

1、用XMLDocument來解析

XmlDocument xmlDocument = new XmlDocument(); 
xmlDocumentLoad("testxml"); 
 
//創(chuàng)建新節(jié)點(diǎn)  
XmlElement nn = xmlDocumentCreateElement("image"); 
nnSetAttribute("imageUrl", "jpg"); 
 
XmlNode node = xmlDocumentSelectSingleNode("content/section/page/gall/folder");//定位到folder節(jié)點(diǎn) 
nodeAppendChild(nn);//附加新節(jié)點(diǎn) 
 
//保存 
xmlDocumentSave("testxml");

2、用Linq to XML來解析

可以通過遍歷，來獲得你想要的節(jié)點(diǎn)的內(nèi)容或?qū)傩?br /> 

XElement root = XElementLoad("testxml"); 
foreach (XAttribute att in rootAttributes()) 
{ 
  rootAdd(new XElement(attName, (string)att)); 
} 
ConsoleWriteLine(root);

3、附一個(gè)詳細(xì)點(diǎn)的例子

比如要解析如下的xml文件，將其轉(zhuǎn)化為Ilist對象。

<?xml version="0" encoding="utf-8"?> 
<Car> 
 <carcost> 
  <ID>20130821133126</ID> 
  <uptime>60</uptime> 
  <downtime>30</downtime> 
  <price>4</price> 
 </carcost> 
 <carcost> 
  <ID>20130821014316</ID> 
  <uptime>120</uptime> 
  <downtime>60</downtime> 
  <price>3</price> 
 </carcost> 
 <carcost> 
  <ID>20130822043127</ID> 
  <uptime>30</uptime> 
  <downtime>0</downtime> 
  <price>5</price> 
 </carcost> 
 <carcost> 
  <ID>20130822043341</ID> 
  <uptime>120以上！</uptime> 
  <downtime>120</downtime> 
  <price>2</price> 
 </carcost> 
</Car>

在控制臺應(yīng)用程序中輸入如下代碼即可。

class Program 
{ 
  static void Main(string[] args) 
  { 
    IList<CarCost> resultList = new List<CarCost>(); 
 
    XmlDocument xmlDocument = new XmlDocument(); 
    xmlDocumentLoad("testxml"); 
 
    XmlNodeList xmlNodeList = xmlDocumentSelectSingleNode("Car")ChildNodes; 
    foreach (XmlNode list in xmlNodeList) 
    { 
      CarCost carcost = new CarCost 
      ( 
        listSelectSingleNode("ID")InnerText, 
        listSelectSingleNode("uptime")InnerText, 
        listSelectSingleNode("downtime")InnerText, 
        floatParse(listSelectSingleNode("price")InnerText) 
      ); 
      resultListAdd(carcost); 
    } 
 
    IEnumerator enumerator = resultListGetEnumerator(); 
    while (enumeratorMoveNext()) 
    { 
      CarCost carCost = enumeratorCurrent as CarCost; 
      ConsoleWriteLine(carCostID + " " + carCostUpTime + " " + carCostDownTime + " " + carCostPrice); 
    } 
  } 
} 
 
public class CarCost 
{ 
  public CarCost(string id, string uptime, string downtime, float price) 
  { 
    thisID = id; 
    thisUpTime = uptime; 
    thisDownTime = downtime; 
    thisPrice = price; 
  } 
  public string ID { get; set; } 
  public string UpTime { get; set; } 
  public string DownTime { get; set; } 
  public float Price { get; set; } 
}

二、C#對JSON格式數(shù)據(jù)的解析

引用NewtonsoftJsondll文件，來解析。

比如：有個(gè)要解析的JSON字符串

[{"TaskRoleSpaces":"","TaskRoles":"","ProxyUserID":"5d9ad5dc1c5e494db1d1b4d8d79b60a7","UserID":"5d9ad5dc1c5e494db1d1b4d8d79b60a7","UserName":"姓名","UserSystemName":"2234","OperationName":"送合同負(fù)責(zé)人","OperationValue":"同意","OperationValueText":"","SignDate":"2013-06-19 10:31:26","Comment":"同意","FormDataHashCode":"","SignatureDivID":""},{"TaskRoleSpaces":"","TaskRoles":"","ProxyUserID":"2c96c3943826ea93013826eafe6d0089","UserID":"2c96c3943826ea93013826eafe6d0089","UserName":"姓名2","UserSystemName":"1234","OperationName":"送合同負(fù)責(zé)人","OperationValue":"同意","OperationValueText":"","SignDate":"2013-06-20 09:37:11","Comment":"同意","FormDataHashCode":"","SignatureDivID":""}]

首先定義個(gè)實(shí)體類：

public class JobInfo 
{ 
  public string TaskRoleSpaces { get; set; } 
  public string TaskRoles { get; set; } 
  public string ProxyUserID { get; set; } 
  public string UserID { get; set; } 
  public string UserName { get; set; } 
  public string UserSystemName { get; set; } 
  public string OperationName { get; set; } 
  public string OperationValue { get; set; } 
  public string OperationValueText { get; set; } 
  public DateTime SignDate { get; set; } 
  public string Comment { get; set; } 
  public string FormDataHashCode { get; set; } 
  public string SignatureDivID { get; set; } 
}

然后在控制臺Main函數(shù)內(nèi)部輸入如下代碼：

string json = @"[{'TaskRoleSpaces':'','TaskRoles':'','ProxyUserID':'5d9ad5dc1c5e494db1d1b4d8d79b60a7','UserID':'5d9ad5dc1c5e494db1d1b4d8d79b60a7','UserName':'姓名','UserSystemName':'2234','OperationName':'送合同負(fù)責(zé)人','OperationValue':'同意','OperationValueText':'','SignDate':'2013-06-19 10:31:26','Comment':'同意','FormDataHashCode':'','SignatureDivID':''},{'TaskRoleSpaces':'','TaskRoles':'','ProxyUserID':'2c96c3943826ea93013826eafe6d0089','UserID':'2c96c3943826ea93013826eafe6d0089','UserName':'姓名2','UserSystemName':'1234','OperationName':'送合同負(fù)責(zé)人','OperationValue':'同意','OperationValueText':'','SignDate':'2013-06-20 09:37:11','Comment':'同意','FormDataHashCode':'','SignatureDivID':''}] 
"; 
  
      List<JobInfo> jobInfoList = JsonConvertDeserializeObject<List<JobInfo>>(json); 
  
      foreach (JobInfo jobInfo in jobInfoList) 
      { 
        ConsoleWriteLine("UserName:" + jobInfoUserName + "UserID:" + jobInfoUserID); 
      }

這樣就可以正常輸出內(nèi)容了。

我想肯定有人會問，如果有多層關(guān)系的json字符串該如何處理呢？沒關(guān)系，一樣的處理。

比如如何解析這個(gè)json字符串：[{'phantom':true,'id':'20130717001','data':{'MID':1019,'Name':'aaccccc','Des':'cc','Disable':'啟用','Remark':'cccc'}}]  ？

首先還是定義實(shí)體類：

public class Info 
{ 
  public string phantom { get; set; } 
  public string id { get; set; } 
  public data data { get; set; } 
} 
 
public class data 
{ 
  public int MID { get; set; } 
  public string Name { get; set; } 
  public string Des { get; set; } 
  public string Disable { get; set; } 
  public string Remark { get; set; } 
}

然后在main方法里面，鍵入：

string json = @"[{'phantom':true,'id':'20130717001','data':{'MID':1019,'Name':'aaccccc','Des':'cc','Disable':'啟用','Remark':'cccc'}}]"; 
List<Info> infoList = JsonConvertDeserializeObject<List<Info>>(json); 
 
foreach (Info info in infoList) 
{ 
  ConsoleWriteLine("id:" + infodataMID); 
}

按照我們的預(yù)期，應(yīng)該能夠得到1019的結(jié)果。

截圖為證：

再附一個(gè)JSON解析的例子，來自于兔子家族—二哥在本篇博客下的回復(fù)。

JSON字符串1：{success:true,data:{id:100001,code:\"JTL-Z38005\",name:\"奧迪三輪轂\",location:\"A-202\",qty:100,bins:[{code:\"JTL-Z38001\",name:\"奧迪三輪轂\",location:\"A-001\",qty:100},{ code:\"JTL-Z38002\",name:\"奧迪三輪轂\",location:\"A-002\",qty:100}]}}

定義數(shù)據(jù)結(jié)構(gòu)：

public class Data 
 { 
   public Boolean success { get; set; } 
   public Data1 data { get; set; } 
 } 
 
 public class Data1 
 { 
   public Int32 id { get; set; } 
   public string code { get; set; } 
   public string name { get; set; } 
   public string location { get; set; } 
   public Int32 qty { get; set; } 
   public List<Data2> bins { get; set; } 
 } 
 
 public class Data2 
 { 
   public string code { get; set; } 
   public string name { get; set; } 
   public string location { get; set; } 
   public Int32 qty { get; set; } 
 }

Main函數(shù)：

class Program 
  { 
    static void Main(string[] args) 
    { 
      string json = "{success:true,data:{id:100001,code:\"JTL-Z38005\",name:\"奧迪三輪轂\",location:\"A-202\",qty:100,bins:[{code:\"JTL-Z38001\",name:\"奧迪三輪轂\",location:\"A-001\",qty:100},{ code:\"JTL-Z38002\",name:\"奧迪三輪轂\",location:\"A-002\",qty:100}]}}"; 
      Data data = JsonConvertDeserializeObject<Data>(json); 
 
      foreach (var item in datadatabins) 
      { 
        //輸出：JTL-Z38001、JTL-Z38002，其它類似 
        ConsoleWriteLine(itemcode); 
      } 
    } 
  }

JSON字符串2：

 {\"success\":true,\"data\":{\"name\":\"張三\",\"moulds\":{\"stockImport\":true,\"stockExport\":true,\"justifyLocation\":true,\"justifyBin\":false,\"binRelease\":false}}}

在控制臺應(yīng)用程序下的完整代碼：

namespace ConsoleApplication1 
{ 
  class Program 
  { 
    static void Main(string[] args) 
    { 
      string json = "{\"success\":true,\"data\":{\"name\":\"張三\",\"moulds\":{\"stockImport\":true,\"stockExport\":true,\"justifyLocation\":true,\"justifyBin\":false,\"binRelease\":false}}}"; 
      Data data = JsonConvertDeserializeObject<Data>(json); 
      ConsoleWriteLine(datadatamouldsbinRelease);//輸出False 
    } 
  } 
 
  public class Data 
  { 
    public Boolean success { get; set; } 
    public Data1 data { get; set; } 
  } 
 
  public class Data1 
  { 
    public string name { get; set; } 
    public Data2 moulds { get; set; } 
  } 
 
  public class Data2 
  { 
    public Boolean stockImport { get; set; } 
    public Boolean stockExport { get; set; } 
    public Boolean justifyLocation { get; set; } 
    public Boolean justifyBin { get; set; } 
    public Boolean binRelease { get; set; } 
  } 
}

JSON字符串3：

{
  "success": true,
  "data": {
    "id": 100001,
    "bin": "JIT-3JS-2K",
    "targetBin": "JIT-3JS-3K",
    "batchs": [
      "B20140101",
      "B20140102"
    ]
  }
}

他的問題主要是不知道batchs這里怎么處理，其實(shí)很簡單就是一個(gè)數(shù)組而已。

完整代碼如下：

namespace ConsoleApplication1 
{ 
  class Program 
  { 
    static void Main(string[] args) 
    { 
      string json = "{\"success\": true,\"data\": {\"id\": 100001,\"bin\": \"JIT-3JS-2K\",\"targetBin\": \"JIT-3JS-3K\",\"batchs\": [\"B20140101\",\"B20140102\"]}}"; 
      Data data = JsonConvertDeserializeObject<Data>(json); 
 
      foreach (var item in datadatabatchs) 
      { 
        ConsoleWriteLine(item);//輸出：B20140101、B20140102 
      } 
    } 
  } 
 
  public class Data 
  { 
    public Boolean success { get; set; } 
 
    public Data1 data { get; set; } 
  } 
 
  public class Data1 
  { 
    public Int32 id { get; set; } 
 
    public string bin { get; set; } 
 
    public string targetBin { get; set; } 
 
    public string[] batchs { get; set; } 
  } 
}

除了上述返回類的實(shí)體對象做法之外，JSONNET還提供了JObject類，可以取自己指定節(jié)點(diǎn)的內(nèi)容。

比如：

namespace ConsoleApplication1 
{ 
  class Program 
  { 
    static void Main(string[] args) 
    { 
      string j = "{success:true,data:{ bin:{code:\"JTL-Z38001\",name:\"奧迪三輪轂\",location:\"A-001\",qty:100}}}"; 
      JObject jo = (JObject)JsonConvertDeserializeObject(j); 
      ConsoleWriteLine(jo); 
    } 
  } 
 
  public class Data 
  { 
    public Boolean success { get; set; } 
    public Data1 data { get; set; } 
  } 
 
  public class Data1 
  { 
    public Data2 bin { get; set; } 
  } 
 
  public class Data2 
  { 
    public string code { get; set; } 
    public string name { get; set; } 
    public string location { get; set; } 
    public Int32 qty { get; set; } 
  } 
}

直接運(yùn)行，返回結(jié)果如下：

如果輸出內(nèi)容修改為：

ConsoleWriteLine(jo["data"]);

繼續(xù)取bin節(jié)點(diǎn)。

ConsoleWriteLine(jo["data"]["bin"]);

最后我們?nèi)∑渲衝ame對應(yīng)的value。

ConsoleWriteLine(jo["data"]["bin"]["name"]);

一步一步的獲取了JSON字符串對應(yīng)的Value。

——————————————————————————————————————————————————

群里有人提出一個(gè)問題，比如我要生成如下的JSON字符串，該如何處理呢？

{
  "id": 1,
  "value": "cate",
  "child": [
    {
      "id": 1,
      "value": "cate",
      "child": [
        
      ]
    },
    {
      "id": 1,
      "value": "cate",
      "child": [
        {
          "id": 2,
          "value": "cate2",
          "child": [
            {
              "id": 3,
              "value": "cate3",
              "child": [
                
              ]
            }
          ]
        }
      ]
    }
  ]
}

通過觀察我們會發(fā)現(xiàn)，其實(shí)規(guī)律比較好找，就是包含id、value、child這樣的屬性，child又包含id、value、child這樣的屬性，可以無限循環(huán)下去，是個(gè)典型的樹形結(jié)構(gòu)。

完整的代碼如下：

namespace ConsoleApplication1 
{ 
  class Program 
  { 
    static void Main(string[] args) 
    { 
      Data data = new Data(); 
      dataid = 1; 
      datavalue = "cate"; 
      datachild = new List<Data>()  
      {  
        new Data(){ id=1,value="cate",child=new List<Data>(){}} , 
        new Data(){ id=1,value="cate",child=new List<Data>() 
        {  
          new Data() 
          {  
            id=2,  
            value="cate2" ,  
            child = new List<Data>() 
            {  
              new Data() 
              { 
                id = 3, 
                value = "cate3", 
                child = new List<Data>(){}, 
              } 
            }, 
          } 
        }} , 
      }; 
 
      //序列化為json字符串 
      string json = JsonConvertSerializeObject(data); 
      ConsoleWriteLine(json); 
 
      //反序列化為對象 
      Data jsonData = JsonConvertDeserializeObject<Data>(json); 
    } 
  } 
 
  public class Data 
  { 
    public int id { get; set; } 
    public string value { get; set; } 
    public List<Data> child { get; set; } 
  } 
}

我們驗(yàn)證一下生成的結(jié)果：

JObject jo = (JObject)JsonConvertDeserializeObject(json); 
ConsoleWriteLine(jo);

再來一個(gè)復(fù)雜點(diǎn)的JSON結(jié)構(gòu)：

[
  {
    "downList": [],
    "line": {
      "Id": -1,
      "Name": "admin",
      "icCard": "1"
    },
    "upList": [
      {
        "endTime": "18:10",
        "startTime": "06:40",
        "sId": 385,
        "sType": "38"
      },
      {
        "endTime": "18:10",
        "startTime": "06:40",
        "sId": 1036,
        "sType": "38"
      }
    ]
  },
  {
    "downList": [],
    "line": {
      "Id": -1,
      "Name": "admin",
      "icCard": "1"
    },
    "upList": [
      {
        "endTime": "18:10",
        "startTime": "06:40",
        "sId": 385,
        "sType": "38"
      },
      {
        "endTime": "18:10",
        "startTime": "06:40",
        "sId": 1036,
        "sType": "38"
      }
    ]
  }
]


namespace ConsoleApplication1 
{ 
  class Program 
  { 
    static void Main(string[] args) 
    { 
      string jsonString = "[{\"downList\": [],\"line\": {\"Id\": -1,\"Name\": \"admin\",\"icCard\": \"1\"},\"upList\": [{\"endTime\": \"18:10\",\"startTime\": \"06:40\",\"sId\": 385,\"sType\": \"38\"},{\"endTime\": \"18:10\",\"startTime\": \"06:40\",\"sId\": 1036,\"sType\": \"38\"}]},{\"downList\": [],\"line\": {\"Id\": -1,\"Name\": \"admin\",\"icCard\": \"1\"},\"upList\": [{\"endTime\": \"18:10\",\"startTime\": \"06:40\",\"sId\": 385,\"sType\": \"38\"},{\"endTime\": \"18:10\",\"startTime\": \"06:40\",\"sId\": 1036,\"sType\": \"38\"}]}]"; 
      Data[] datas = JsonConvertDeserializeObject<Data[]>(jsonString); 
 
      foreach (Data data in datas) 
      { 
        downList[] downList = datadownList; 
        line line = dataline; 
        upList[] upLists = dataupList; 
 
        //輸出 
        ConsoleWriteLine(stringJoin(",", lineId, lineName, lineicCard)); 
        foreach (upList upList in upLists) 
        { 
          ConsoleWriteLine(stringJoin(",", upListendTime, upListstartTime, upListsId, upListsType)); 
        } 
        ConsoleWriteLine("-----------------------------------------------"); 
      } 
    } 
  } 
 
 
  public class Data 
  { 
    public downList[] downList { get; set; } 
    public line line { get; set; } 
    public upList[] upList { get; set; } 
  } 
 
  public class downList 
  { 
 
  } 
 
  public class line 
  { 
    public int Id { get; set; } 
    public string Name { get; set; } 
    public string icCard { get; set; } 
  } 
 
  public class upList 
  { 
    public string endTime { get; set; } 
 
    public string startTime { get; set; } 
 
    public int sId { get; set; } 
 
    public string sType { get; set; } 
  } 
}

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持我們。

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