我是解析JSON的新手，我正在尝试使用C＃在SSIS 2016中的脚本任务中解析JSON文件。我已将JSON文件复制并粘贴到VS217中，以获取必要的类：
JSON文件
{
"success": true,
"timestamp": 1554234137217,
"code": null,
"message": null,
"response": {
"startAt": 1501,
"maxResults": 250,
"total": 8959,
"data": [
{
"code": "46346",
"description": "This is my item name",
"alternateDescription": "This might be in a a different language (could also be null value)",
"quantityAvailable": 11.0,
"weightAvailable": null,
"quantityOnCustomerOrder": 0.0,
"weightOnCustomerOrder": null,
"quantityOnPurchaseOrder": 0.0,
"weightOnPurchaseOrder": null,
"brand": {
"code": "3388",
"description": "Vendor brand name here",
"alternateDescription": "vendor brand name in a different language (could also be null value)"
},
"vendor": {
"code": 8106,
"name": "Vendor name here",
"alternateName": "vendor brand name in a different language (could also be null value)",
"province": "AB",
"productCode": "D360CCN",
"purchaseFormatCode": "CS",
"purchaseFormatPackaging": "1 X 8 L",
"upcCode": "00793569000573"
},
"equivalentProduct": {
"code": "782388",
"description": null,
"alternateDescription": null,
"format": {
"code": "CS",
"description": "1 X 8 L",
"conversionFactor": 1.0
}
},
"grid": {
"code": "200",
"description": "Regional warehouse name (could also be null value)",
"alternateDescription": "Regional warehouse alternate name (could also be null value)",
"province": "ON"
},
"warehouse": {
"code": "80",
"name": "Name of shipping warehouse (could also be null value)"
}
}
]
}
}
VS的课程
namespace Inventory{
public class Rootobject{
public bool success { get; set; }
public long timestamp { get; set; }
public object code { get; set; }
public object message { get; set; }
public Response response { get; set; }
}
public class Response{
public int startAt { get; set; }
public int maxResults { get; set; }
public int total { get; set; }
public Datum[] data { get; set; }
}
public class Datum{
public string code { get; set; }
public string description { get; set; }
public string alternateDescription { get; set; }
public float quantityAvailable { get; set; }
public object weightAvailable { get; set; }
public float quantityOnCustomerOrder { get; set; }
public object weightOnCustomerOrder { get; set; }
public float quantityOnPurchaseOrder { get; set; }
public object weightOnPurchaseOrder { get; set; }
public Brand brand { get; set; }
public Vendor vendor { get; set; }
public Equivalentproduct equivalentProduct { get; set; }
public Grid grid { get; set; }
public Warehouse warehouse { get; set; }
}
public class Brand{
public string code { get; set; }
public string description { get; set; }
public string alternateDescription { get; set; }
}
public class Vendor{
public int code { get; set; }
public string name { get; set; }
public string alternateName { get; set; }
public string province { get; set; }
public string productCode { get; set; }
public string purchaseFormatCode { get; set; }
public string purchaseFormatPackaging { get; set; }
public string upcCode { get; set; }
}
public class Equivalentproduct{
public string code { get; set; }
public object description { get; set; }
public object alternateDescription { get; set; }
public Format format { get; set; }
}
public class Format{
public string code { get; set; }
public string description { get; set; }
public float conversionFactor { get; set; }
}
public class Grid{
public string code { get; set; }
public string description { get; set; }
public string alternateDescription { get; set; }
public string province { get; set; }
}
public class Warehouse{
public string code { get; set; }
public string name { get; set; }
}
}
脚本任务中的main.cs代码如下：
using System;
using System.Web.Script.Serialization;
using System.IO;
using Inventory;
[Microsoft.SqlServer.Dts.Pipeline.SSISScriptComponentEntryPointAttribute]
public class ScriptMain : UserComponent{
public override void PreExecute(){
base.PreExecute();
}
public override void PostExecute()
{
base.PostExecute();
}
public override void CreateNewOutputRows()
{
String jsonFileContent = File.ReadAllText(Variables.varInventoryFilePath);
JavaScriptSerializer js = new JavaScriptSerializer();
InventoryFile inventory = js.Deserialize<InventoryFile>(jsonFileContent);
foreach (Datum item in inventory.response.data) {
Output0Buffer.AddRow();
Output0Buffer.InventoryCode = item.code.ToString();
Output0Buffer.InventoryDescription = item.description.ToString();
Output0Buffer.InventoryAlternateDescription = item.description.ToString();
Output0Buffer.InventoryQuantityAvailable = item.quantityAvailable.ToString();
Output0Buffer.InventoryWeightAvailable = item.weightAvailable.ToString();
Output0Buffer.InventoryQuantityOnCustomerOrder = item.quantityOnCustomerOrder.ToString();
Output0Buffer.InventoryWeightOnCustomerOrder = item.weightOnCustomerOrder.ToString();
Output0Buffer.InventoryQuantityOnPurchaseOrder = item.quantityOnPurchaseOrder.ToString();
Output0Buffer.InventoryWeightOnPurchaseOrder = item.weightOnPurchaseOrder.ToString();
//Output0Buffer.InventoryBrandCode = item.brand.code.ToString();
//Output0Buffer.InventoryBrandDescription = item.brand.description.ToString();
//Output0Buffer.InventoryBrandAlternateDescription = item.brand.alternateDescription.ToString();
//Output0Buffer.InventoryVendorCode = item.vendor.code.ToString();
//Output0Buffer.InventoryVendorName = item.vendor.name.ToString();
//Output0Buffer.InventoryVendorAlternateName = item.vendor.alternateName.ToString();
//Output0Buffer.InventoryVendorProvince = item.vendor.province.ToString();
//Output0Buffer.InventoryVendorProductCode = item.vendor.productCode.ToString();
//Output0Buffer.InventoryVendorPurchaseFormatCode = item.vendor.purchaseFormatCode.ToString();
//Output0Buffer.InventoryVendorPurchaseFormatPackaging = item.vendor.purchaseFormatPackaging.ToString();
//Output0Buffer.InventoryVendorUPCCode = item.vendor.upcCode.ToString();
//Output0Buffer.InventoryEquivalentProductCode = item.equivalentProduct.code.ToString();
//Output0Buffer.InventoryEquivalentProductDescription = item.equivalentProduct.description.ToString();
//Output0Buffer.InventoryEquivalentProductAlternateDescription = item.equivalentProduct.alternateDescription.ToString();
Output0Buffer.InventoryEquivalentProductFormatCode = item.equivalentProduct.format.code.ToString();
Output0Buffer.InventoryEquivalentProductFormatDescription = item.equivalentProduct.format.description.ToString();
Output0Buffer.InventoryEquivalentProductFormatConversionFactor = item.equivalentProduct.format.conversionFactor.ToString();
Output0Buffer.InventoryGridCode = item.grid.code.ToString();
Output0Buffer.InventoryGridDescription = item.grid.description.ToString();
Output0Buffer.InventoryGridAlternateDescription = item.grid.alternateDescription.ToString();
Output0Buffer.InventoryGridProvince = item.grid.province.ToString();
Output0Buffer.InventoryWarehouseCode = item.warehouse.code.ToString();
Output0Buffer.InventoryWarehouseName = item.warehouse.name.ToString();
}
}
}
SSIS程序包使用上面的代码运行文件（保留上面显示的注释行），但是当我取消注释其他行之一并运行程序包时，出现以下错误消息：
Script Component has encountered an exception in user code:
Project name: SC_bd76c219e4854aa3802328ef721c2006
Object reference is not set to an instance of an object
at ScriptMain.CreateNewOutputRows()
at UserComponent.PrimeOutput(Int32 Outputs, Int32[] OutputIDs, PipelineBuffer[] Buffers, OutputNameMap OutputMap)
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.PrimeOutput(Int32 outputs, Int32[] outputIDs, PipelineBuffer[] buffers)
我的第一个想法是对象字段不正确（即：公共对象代码{get; set;}应该读取字符串），所以我更改了声明（即：公共字符串代码{get; set;}）并运行再次打包，但出现相同的错误。
我的应用程序开发机器上有完全相同的代码，并且读取完全相同的文件没有问题。我无所适从地解释了SSIS中的此错误，因为我在网上找到的每个示例都表明我的代码应该可以正常工作。