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[英]json Cannot access child value on Newtonsoft.Json.Linq.JValue
[英]Querying Json with Linq, Cannot access child value
我是使用 JSON 的 C# 新手。 我想使用 Nvidia API 選擇“特色產品”部分,但出現錯誤
無法訪問 Newtonsoft.Json.Linq.JProperty 上的子值。
此代碼適用於“searchedProducts”部分。
你能解釋一下為什么嗎?
const string url = "";
const int refresh = 3000;
string json = getGpuFromNvidia(url);
var jsonParse = JObject.Parse(json);
var result = jsonParse["searchedProducts"]["featuredProduct"]
.Where(n => n["isFounderEdition"].Value<bool>() == true)
.Select(p => new CarteGraphique
{
displayName = (string)p["displayName"],
prdStatus = (string)p["prdStatus"],
directPurchaseLink = (string)p["retailers"][0]["directPurchaseLink"]
})
.ToList();
我在 VS 中測試了這段代碼
string json = ...your code
var jsonObj = JsonConvert.DeserializeObject<NvidiaRoot>(json);
var result = jsonObj.searchedProducts.productDetails
.Where(n => n.isFounderEdition)
.Select(p => new
{
displayName = p.displayName,
prdStatus = p.prdStatus,
directPurchaseLink = p.retailers[0].directPurchaseLink
})
.ToList();
輸出
[
{
"displayName": "NVIDIA RTX 3090",
"prdStatus": "out_of_stock",
"directPurchaseLink": "https://www.ldlc.com/fiche/PB89455870.html"
},
{
"displayName": "NVIDIA RTX 3070",
"prdStatus": "out_of_stock",
"directPurchaseLink": "https://www.ldlc.com/fiche/PB74221588.html"
},
{
"displayName": "NVIDIA RTX 3060 Ti",
"prdStatus": "out_of_stock",
"directPurchaseLink": "https://www.ldlc.com/fiche/PB54012144.html"
},
{
"displayName": "NVIDIA RTX 3070 Ti",
"prdStatus": "out_of_stock",
"directPurchaseLink": null
},
{
"displayName": "NVIDIA RTX 3080 Ti",
"prdStatus": "out_of_stock",
"directPurchaseLink": null
}
]
更新
如果您只需要一個特色產品
var featuredProduct = jsonObj.searchedProducts.featuredProduct;
var result = new
{
displayName = featuredProduct.displayName,
prdStatus = featuredProduct.prdStatus,
directPurchaseLink = featuredProduct.retailers[0].directPurchaseLink
};
短輸出
{
"displayName": "NVIDIA RTX 3080",
"prdStatus": "out_of_stock",
"directPurchaseLink": "https://www.ldlc.com/fiche/PB15921567.html"
}
全輸出
var result = jsonObj.searchedProducts.featuredProduct;
{
"displayName": "NVIDIA RTX 3080",
"totalCount": 1,
"productID": 30045,
"imageURL": "https://assets.nvidia.partners/images/png/nvidia-geforce-rtx-3080.png",
"productTitle": "NVIDIA GEFORCE RTX 3080",
"digitialRiverID": "",
"productSKU": "NVGFT080",
"productUPC": "NVGFT080_FR",
"productUPCOriginal": "NVGFT080",
"productPrice": "€719.00",
"productAvailable": false,
"productRating": null,
"customerReviewCount": null,
"isFounderEdition": true,
"isFeaturedProduct": true,
"certified": false,
"manufacturer": "NVIDIA",
"locale": "FR",
"isFeaturedProdcutFoundInSecondSearch": false,
"category": "GPU",
"gpu": "RTX 3080",
"purchaseOption": "",
"prdStatus": "out_of_stock",
"minShipDays": null,
"maxShipDays": null,
"shipInfo": null,
"isOffer": false,
"offerText": "",
"retailers": [
{
"productId": 30045,
"productTitle": "NVIDIA GEFORCE RTX 3080",
"logoUrl": "https://assets.nvidia.partners/logos/geforce/retailer-ldlc.png",
"isAvailable": true,
"salePrice": "719.00",
"directPurchaseLink": "https://www.ldlc.com/fiche/PB15921567.html",
"purchaseLink": "https://www.ldlc.com/fiche/PB15921567.html",
"hasOffer": false,
"offerText": null,
"partnerId": "45",
"storeId": "45",
"upc": "NVGFT080_FR",
"sku": "NVGFT080",
"stock": 0,
"retailerName": "https://www.ldlc.com",
"type": 80
}
],
"productInfo": [
{
"name": "cooling_system",
"value": "Fan"
},
{
"name": "gpu_boost_clock_speed",
"value": "1.71 GHz"
},
{
"name": "gpu_memory_size",
"value": "10 GB"
}
],
"compareProductInfo": [
{
"name": "cooling_system",
"value": "Fan"
},
{
"name": "gpu_clock_speed",
"value": "1.44 GHz"
},
{
"name": "gpu_boost_clock_speed",
"value": "1.71 GHz"
},
{
"name": "gpu_memory_size",
"value": "10 GB"
}
]
}
班級
public class NvidiaRoot
{
public object categories { get; set; }
public List<Filter> filters { get; set; }
public object filterGroups { get; set; }
public object search { get; set; }
public string version { get; set; }
public List<Sort> sort { get; set; }
public Pagination pagination { get; set; }
public SearchedProducts searchedProducts { get; set; }
public Disclaimer disclaimer { get; set; }
}
public class FilterValue
{
public string dispValue { get; set; }
public object dispValueDesription { get; set; }
public object groupType { get; set; }
public int units { get; set; }
public bool @checked { get; set; }
public object imageURL { get; set; }
public bool isValidate { get; set; }
}
public class Filter
{
public string displayName { get; set; }
public string filterField { get; set; }
public string displayMaxValues { get; set; }
public string fieldType { get; set; }
public int? selectedMinRangeVal { get; set; }
public int? selectedMaxRangeVal { get; set; }
public int? defaultMinRangeVal { get; set; }
public int? defaultMaxRangeVal { get; set; }
public string unitsOfMeasure { get; set; }
public bool @checked { get; set; }
public object units { get; set; }
public List<FilterValue> filterValues { get; set; }
public string dataType { get; set; }
public bool showCount { get; set; }
public int filterDisplayOrder { get; set; }
}
public class Sort
{
public string displayName { get; set; }
public string value { get; set; }
public bool selected { get; set; }
}
public class Pagination
{
public int page { get; set; }
public int limit { get; set; }
public int totalRecords { get; set; }
public bool featuredProductIncludedInCount { get; set; }
}
public class Retailer
{
public int productId { get; set; }
public string productTitle { get; set; }
public string logoUrl { get; set; }
public bool isAvailable { get; set; }
public string salePrice { get; set; }
public string directPurchaseLink { get; set; }
public string purchaseLink { get; set; }
public bool hasOffer { get; set; }
public object offerText { get; set; }
public string partnerId { get; set; }
public string storeId { get; set; }
public string upc { get; set; }
public string sku { get; set; }
public int stock { get; set; }
public string retailerName { get; set; }
public int type { get; set; }
}
public class ProductInfo
{
public string name { get; set; }
public string value { get; set; }
}
public class CompareProductInfo
{
public string name { get; set; }
public string value { get; set; }
}
public class FeaturedProduct
{
public string displayName { get; set; }
public int totalCount { get; set; }
public int productID { get; set; }
public string imageURL { get; set; }
public string productTitle { get; set; }
public string digitialRiverID { get; set; }
public string productSKU { get; set; }
public string productUPC { get; set; }
public string productUPCOriginal { get; set; }
public string productPrice { get; set; }
public bool productAvailable { get; set; }
public object productRating { get; set; }
public object customerReviewCount { get; set; }
public bool isFounderEdition { get; set; }
public bool isFeaturedProduct { get; set; }
public bool certified { get; set; }
public string manufacturer { get; set; }
public string locale { get; set; }
public bool isFeaturedProdcutFoundInSecondSearch { get; set; }
public string category { get; set; }
public string gpu { get; set; }
public string purchaseOption { get; set; }
public string prdStatus { get; set; }
public object minShipDays { get; set; }
public object maxShipDays { get; set; }
public object shipInfo { get; set; }
public bool isOffer { get; set; }
public string offerText { get; set; }
public List<Retailer> retailers { get; set; }
public List<ProductInfo> productInfo { get; set; }
public List<CompareProductInfo> compareProductInfo { get; set; }
}
public class ProductDetail
{
public string displayName { get; set; }
public int totalCount { get; set; }
public int productID { get; set; }
public string imageURL { get; set; }
public string productTitle { get; set; }
public string digitialRiverID { get; set; }
public string productSKU { get; set; }
public string productUPC { get; set; }
public string productUPCOriginal { get; set; }
public string productPrice { get; set; }
public bool productAvailable { get; set; }
public object productRating { get; set; }
public object customerReviewCount { get; set; }
public bool isFounderEdition { get; set; }
public bool isFeaturedProduct { get; set; }
public bool certified { get; set; }
public string manufacturer { get; set; }
public string locale { get; set; }
public bool isFeaturedProdcutFoundInSecondSearch { get; set; }
public string category { get; set; }
public string gpu { get; set; }
public string purchaseOption { get; set; }
public string prdStatus { get; set; }
public object minShipDays { get; set; }
public object maxShipDays { get; set; }
public object shipInfo { get; set; }
public bool isOffer { get; set; }
public string offerText { get; set; }
public List<Retailer> retailers { get; set; }
public List<ProductInfo> productInfo { get; set; }
public List<CompareProductInfo> compareProductInfo { get; set; }
}
public class SearchedProducts
{
public int totalProducts { get; set; }
public bool featuredProductIncludedInCount { get; set; }
public bool featuredProductsFlag { get; set; }
public FeaturedProduct featuredProduct { get; set; }
public List<ProductDetail> productDetails { get; set; }
public List<object> suggestedProductDetails { get; set; }
}
public class Disclaimer
{
public string text { get; set; }
}
你可以試試下面的代碼。
獲取特色產品。 示例工作代碼在這里
var jsonParse = JObject.Parse(json);
var featuredProduct = jsonParse["searchedProducts"]["featuredProduct"];
var f = new CarteGraphique
{
displayName = featuredProduct["displayName"].ToString(),
prdStatus = featuredProduct["prdStatus"].ToString(),
directPurchaseLink = featuredProduct["retailers"][0]["directPurchaseLink"].ToString()
};
Console.WriteLine("Featured Product Details : " + f.displayName + ", " + f.prdStatus + ", " + f.directPurchaseLink);
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