使用C＃：如何使用Newtonsoft.JSON迭代嵌套的JSON？

我正在拉取大量项目的JSON数据。每个项目都有一组我想抓取的特定数据并放置在列表中。使用C＃：如何使用Newtonsoft.JSON迭代嵌套的JSON？

以下是JSON数据中包含的700多个项目中的两个项目的示例。我需要能够使用Newtonsoft.JSON遍历JSON数据，并为“fieldName”：“Item ID”在“items”，“values”，“value”处提取数据。我需要为JSON数据中返回的所有700个项目执行此操作。如何迭代这些数据并访问这些特定的数据？

{ 
items: [  
    { 
     "createDate": 1468872878834, 
     "updateDate": 1498075185297, 
     "deleted": 0, 
     "allListsItemCount": 0, 
     "assets": [ 
     { 
      "createDate": 1469129652323, 
      "updateDate": 1471625094427, 
      "deleted": 0, 
      "url": "A_O_Smith_SQ1032_lg.jpg", 
      "parentId": 10270308, 
      "typeId": 4000014573, 
      "filename": "A_O_Smith_SQ1032_lg.jpg", 
      "seqOrder": 1, 
      "printActive": 1, 
      "webActive": 1, 
      "thumbnail": 1, 
      "flag1": 1, 
      "typeName": "Web Thumbnail Image", 
      "typeGroupCode": "PRIM", 
      "id": 4063212155, 
      "transformationSource": false, 
      "primaryAsset": false 
     }, 
     { 
      "createDate": 1469129652323, 
      "updateDate": 1471625094427, 
      "deleted": 0, 
      "url": "A_O_Smith_SQ1032.tif", 
      "parentId": 10270308, 
      "typeId": 4000014572, 
      "filename": "A_O_Smith_SQ1032.tif", 
      "seqOrder": 2, 
      "printActive": 1, 
      "webActive": 0, 
      "typeName": "Print Image", 
      "typeGroupCode": "PRIM", 
      "id": 4063212156, 
      "transformationSource": false, 
      "primaryAsset": false 
     } 
     ], 
     "masterCategoryId": 4000593879, 
     "listsCount": 0, 
     "advTablesCount": 0, 
     "id": 10270308, 
     "values": [ 
     { 
      "languageId": 1, 
      "fieldId": 20002078, 
      "fieldName": "Amps", 
      "value": "19.20/9.60" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20000921, 
      "fieldKey": "Item_ID", 
      "fieldName": "Item ID", 
      "value": "USQ1152" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002075, 
      "fieldKey": "Inv_Mast_UID", 
      "fieldName": "Inv_Mast_UID", 
      "value": "6736" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002081, 
      "fieldName": "Bearings", 
      "value": "Sealed Ball" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002141, 
      "fieldKey": "Web_Description", 
      "fieldName": "Web&UPC Description", 
      "value": "CENTURY MOTOR      NS" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002190, 
      "fieldKey": "Web_Image", 
      "fieldName": "Image Name LR", 
      "value": "A_O_Smith_SQ1032_lg" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002191, 
      "fieldName": "Image Name HR", 
      "value": "A_O_Smith_SQ1032" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002089, 
      "fieldName": "Features", 
      "value": "Used on many Sta-Rite - Red Jacket, Pac Fab & American pprojets and Sears jet and pool pumps,High & low service factors, 303 Stainless steel threaded shaft, 50 Degrees C ambient, Capacitor sart" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002088, 
      "fieldName": "Enclosure", 
      "value": "Open Drip Proof" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002091, 
      "fieldName": "Frame" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002092, 
      "fieldName": "H.P.", 
      "value": "1-1/2" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002093, 
      "fieldName": "Hertz", 
      "value": "60" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002524, 
      "fieldName": "Mounting Option", 
      "value": "Square Flange" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002104, 
      "fieldName": "Overload", 
      "value": "Automatic" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002105, 
      "fieldName": "Phase", 
      "value": "Single" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002109, 
      "fieldName": "RPM", 
      "value": "3450" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002110, 
      "fieldName": "Service Factor", 
      "value": "1.1" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002112, 
      "fieldName": "Speeds", 
      "value": "Single" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002114, 
      "fieldName": "Voltage", 
      "value": "115/230" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002108, 
      "fieldName": "Rotation", 
      "value": "CCW Pump End" 
     } 
     ], 
     "number": "USQ1152", 
     "type": "item", 
     "statusId": 4000004050 
    }, 
    { 
     "createDate": 1468872878845, 
     "updateDate": 1495111010291, 
     "deleted": 0, 
     "allListsItemCount": 0, 
     "assets": [ 
     { 
      "createDate": 1469129652335, 
      "updateDate": 1471625094427, 
      "deleted": 0, 
      "url": "A_O_Smith_SQ1032_lg.jpg", 
      "parentId": 10270309, 
      "typeId": 4000014573, 
      "filename": "A_O_Smith_SQ1032_lg.jpg", 
      "seqOrder": 1, 
      "printActive": 1, 
      "webActive": 1, 
      "thumbnail": 1, 
      "flag1": 1, 
      "typeName": "Web Thumbnail Image", 
      "typeGroupCode": "PRIM", 
      "id": 4063212157, 
      "transformationSource": false, 
      "primaryAsset": false 
     }, 
     { 
      "createDate": 1469129652335, 
      "updateDate": 1471625094427, 
      "deleted": 0, 
      "url": "A_O_Smith_SQ1032.tif", 
      "parentId": 10270309, 
      "typeId": 4000014572, 
      "filename": "A_O_Smith_SQ1032.tif", 
      "seqOrder": 2, 
      "printActive": 1, 
      "webActive": 0, 
      "typeName": "Print Image", 
      "typeGroupCode": "PRIM", 
      "id": 4063212158, 
      "transformationSource": false, 
      "primaryAsset": false 
     } 
     ], 
     "masterCategoryId": 4000593879, 
     "listsCount": 0, 
     "advTablesCount": 0, 
     "id": 10270309, 
     "values": [ 
     { 
      "languageId": 1, 
      "fieldId": 20002078, 
      "fieldName": "Amps", 
      "value": "10.4" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20000921, 
      "fieldKey": "Item_ID", 
      "fieldName": "Item ID", 
      "value": "USQ1202" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002075, 
      "fieldKey": "Inv_Mast_UID", 
      "fieldName": "Inv_Mast_UID", 
      "value": "6737" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002141, 
      "fieldKey": "Web_Description", 
      "fieldName": "Web&UPC Description", 
      "value": "CENTURY MOTOR      NS" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002190, 
      "fieldKey": "Web_Image", 
      "fieldName": "Image Name LR", 
      "value": "A_O_Smith_SQ1032_lg" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002191, 
      "fieldName": "Image Name HR", 
      "value": "A_O_Smith_SQ1032" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002089, 
      "fieldName": "Features", 
      "value": "Used on many Sta-Rite - Red Jacket, Pac Fab & American pprojets and Sears jet and pool pumps,High & low service factors, 303 Stainless steel threaded shaft, 50 Degrees C ambient, Capacitor sart" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002102, 
      "fieldName": "Notes", 
      "value": "199" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002088, 
      "fieldName": "Enclosure", 
      "value": "Open Drip Proof" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002091, 
      "fieldName": "Frame" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002092, 
      "fieldName": "H.P.", 
      "value": "2" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002093, 
      "fieldName": "Hertz", 
      "value": "60" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002524, 
      "fieldName": "Mounting Option", 
      "value": "NEMA 56C Face" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002104, 
      "fieldName": "Overload", 
      "value": "Automatic" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002105, 
      "fieldName": "Phase", 
      "value": "Single" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002109, 
      "fieldName": "RPM", 
      "value": "3450" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002110, 
      "fieldName": "Service Factor", 
      "value": "1.1" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002112, 
      "fieldName": "Speeds", 
      "value": "Single" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002114, 
      "fieldName": "Voltage", 
      "value": "230" 
     }, 
     { 
      "languageId": 1, 
      "fieldId": 20002108, 
      "fieldName": "Rotation", 
      "value": "CCWPE-Not Reversible" 
     } 
     ], 
     "number": "USQ1202", 
     "type": "item", 
     "statusId": 4000004050 
    } 
]

}

这是我已经开始用：

string itemJson = await response.Content.ReadAsStringAsync(); 
JObject rss = JObject.Parse(itemJson);

来源

2017-07-31 Kram_Koorbse

以下是哈克，但工程：

using System; 
using Newtonsoft.Json; 
using Newtonsoft.Json.Linq; 

public class Program 
{ 
    public static void Main() 
    { 
     string itemJson = @"{'items':[{'createDate':1468872878834,'updateDate':1498075185297,'deleted':0,'allListsItemCount':0,'assets':[{'createDate':1469129652323,'updateDate':1471625094427,'deleted':0,'url':'A_O_Smith_SQ1032_lg.jpg','parentId':10270308,'typeId':4000014573,'filename':'A_O_Smith_SQ1032_lg.jpg','seqOrder':1,'printActive':1,'webActive':1,'thumbnail':1,'flag1':1,'typeName':'Web Thumbnail Image','typeGroupCode':'PRIM','id':4063212155,'transformationSource':false,'primaryAsset':false},{'createDate':1469129652323,'updateDate':1471625094427,'deleted':0,'url':'A_O_Smith_SQ1032.tif','parentId':10270308,'typeId':4000014572,'filename':'A_O_Smith_SQ1032.tif','seqOrder':2,'printActive':1,'webActive':0,'typeName':'Print Image','typeGroupCode':'PRIM','id':4063212156,'transformationSource':false,'primaryAsset':false}],'masterCategoryId':4000593879,'listsCount':0,'advTablesCount':0,'id':10270308,'values':[{'languageId':1,'fieldId':20002078,'fieldName':'Amps','value':'19.20/9.60'},{'languageId':1,'fieldId':20000921,'fieldKey':'Item_ID','fieldName':'Item ID','value':'USQ1152'},{'languageId':1,'fieldId':20002075,'fieldKey':'Inv_Mast_UID','fieldName':'Inv_Mast_UID','value':'6736'},{'languageId':1,'fieldId':20002081,'fieldName':'Bearings','value':'Sealed Ball'},{'languageId':1,'fieldId':20002141,'fieldKey':'Web_Description','fieldName':'Web&UPC Description','value':'CENTURY MOTOR      NS'},{'languageId':1,'fieldId':20002190,'fieldKey':'Web_Image','fieldName':'Image Name LR','value':'A_O_Smith_SQ1032_lg'},{'languageId':1,'fieldId':20002191,'fieldName':'Image Name HR','value':'A_O_Smith_SQ1032'},{'languageId':1,'fieldId':20002089,'fieldName':'Features','value':'Used on many Sta-Rite - Red Jacket, Pac Fab & American pprojets and Sears jet and pool pumps,High & low service factors, 303 Stainless steel threaded shaft, 50 Degrees C ambient, Capacitor sart'},{'languageId':1,'fieldId':20002088,'fieldName':'Enclosure','value':'Open Drip Proof'},{'languageId':1,'fieldId':20002091,'fieldName':'Frame'},{'languageId':1,'fieldId':20002092,'fieldName':'H.P.','value':'1-1/2'},{'languageId':1,'fieldId':20002093,'fieldName':'Hertz','value':'60'},{'languageId':1,'fieldId':20002524,'fieldName':'Mounting Option','value':'Square Flange'},{'languageId':1,'fieldId':20002104,'fieldName':'Overload','value':'Automatic'},{'languageId':1,'fieldId':20002105,'fieldName':'Phase','value':'Single'},{'languageId':1,'fieldId':20002109,'fieldName':'RPM','value':'3450'},{'languageId':1,'fieldId':20002110,'fieldName':'Service Factor','value':'1.1'},{'languageId':1,'fieldId':20002112,'fieldName':'Speeds','value':'Single'},{'languageId':1,'fieldId':20002114,'fieldName':'Voltage','value':'115/230'},{'languageId':1,'fieldId':20002108,'fieldName':'Rotation','value':'CCW Pump End'}],'number':'USQ1152','type':'item','statusId':4000004050},{'createDate':1468872878845,'updateDate':1495111010291,'deleted':0,'allListsItemCount':0,'assets':[{'createDate':1469129652335,'updateDate':1471625094427,'deleted':0,'url':'A_O_Smith_SQ1032_lg.jpg','parentId':10270309,'typeId':4000014573,'filename':'A_O_Smith_SQ1032_lg.jpg','seqOrder':1,'printActive':1,'webActive':1,'thumbnail':1,'flag1':1,'typeName':'Web Thumbnail Image','typeGroupCode':'PRIM','id':4063212157,'transformationSource':false,'primaryAsset':false},{'createDate':1469129652335,'updateDate':1471625094427,'deleted':0,'url':'A_O_Smith_SQ1032.tif','parentId':10270309,'typeId':4000014572,'filename':'A_O_Smith_SQ1032.tif','seqOrder':2,'printActive':1,'webActive':0,'typeName':'Print Image','typeGroupCode':'PRIM','id':4063212158,'transformationSource':false,'primaryAsset':false}],'masterCategoryId':4000593879,'listsCount':0,'advTablesCount':0,'id':10270309,'values':[{'languageId':1,'fieldId':20002078,'fieldName':'Amps','value':'10.4'},{'languageId':1,'fieldId':20000921,'fieldKey':'Item_ID','fieldName':'Item ID','value':'USQ1202'},{'languageId':1,'fieldId':20002075,'fieldKey':'Inv_Mast_UID','fieldName':'Inv_Mast_UID','value':'6737'},{'languageId':1,'fieldId':20002141,'fieldKey':'Web_Description','fieldName':'Web&UPC Description','value':'CENTURY MOTOR      NS'},{'languageId':1,'fieldId':20002190,'fieldKey':'Web_Image','fieldName':'Image Name LR','value':'A_O_Smith_SQ1032_lg'},{'languageId':1,'fieldId':20002191,'fieldName':'Image Name HR','value':'A_O_Smith_SQ1032'},{'languageId':1,'fieldId':20002089,'fieldName':'Features','value':'Used on many Sta-Rite - Red Jacket, Pac Fab & American pprojets and Sears jet and pool pumps,High & low service factors, 303 Stainless steel threaded shaft, 50 Degrees C ambient, Capacitor sart'},{'languageId':1,'fieldId':20002102,'fieldName':'Notes','value':'199'},{'languageId':1,'fieldId':20002088,'fieldName':'Enclosure','value':'Open Drip Proof'},{'languageId':1,'fieldId':20002091,'fieldName':'Frame'},{'languageId':1,'fieldId':20002092,'fieldName':'H.P.','value':'2'},{'languageId':1,'fieldId':20002093,'fieldName':'Hertz','value':'60'},{'languageId':1,'fieldId':20002524,'fieldName':'Mounting Option','value':'NEMA 56C Face'},{'languageId':1,'fieldId':20002104,'fieldName':'Overload','value':'Automatic'},{'languageId':1,'fieldId':20002105,'fieldName':'Phase','value':'Single'},{'languageId':1,'fieldId':20002109,'fieldName':'RPM','value':'3450'},{'languageId':1,'fieldId':20002110,'fieldName':'Service Factor','value':'1.1'},{'languageId':1,'fieldId':20002112,'fieldName':'Speeds','value':'Single'},{'languageId':1,'fieldId':20002114,'fieldName':'Voltage','value':'230'},{'languageId':1,'fieldId':20002108,'fieldName':'Rotation','value':'CCWPE-Not Reversible'}],'number':'USQ1202','type':'item','statusId':4000004050}]}"; 
     dynamic rss = JObject.Parse(itemJson); 
     dynamic items = rss.items; 
     foreach (dynamic item in items) 
     { 
      dynamic values = item.values; 
      foreach (dynamic val in values) 
      { 
       //Console.WriteLine(val); 
       if (val.fieldName == "Item ID") 
       { 
        Console.WriteLine(val.value); 
       } 
      } 
     } 
    } 
}

来源

2017-07-31 14:28:07 alteraki

谢谢。而其他解决方案也非常好。该解决方案让我深入了解如何正确处理复杂的嵌套JSON。 –

像这样的事情？

foreach (var item in items) 
{ 
    Console.WriteLine("{0}", item.id); 
    foreach (var val in item.values) 
    { 
     Console.WriteLine("{0}", val.fieldName); 
    } 
}

来源

2017-07-31 14:15:53

一种方法是使用http://json2csharp.com/从您的json生成类。

一旦你有了类，你可以将它们添加到你的项目中并使用JSON.net来反序列化整个结构。一旦你已经反序列化JSON到C＃POCO的像

var yourObject = JsonConvert.DeserializeObject<'your c# wrapper class'>(<your json>);

你可以使用Linq查询对象。

来源

2017-07-31 14:16:02 Fran

使用C＃：如何使用Newtonsoft.JSON迭代嵌套的JSON？

回答

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