如何获取将发布到 Web api 的多个 json 对象列表的名称数据？

Question

我在 Web API ASP.NET 中有一个接受单个 Json 对象的 post 方法。这是带有代码的代码，用于检查来自发布 Json 的数据是否存在于我的数据库中。我将使用 Linq 与我的数据库进行交互。 Sales_ 是在我的上下文中自动生成的，我相信来自 EntityFramework。 db 是我的数据库对象。

public HttpResponseMessage PostSales(Sales Sales, [FromUri] string auth)
        {
            try
            {
                if (ModelState.IsValid)
                {                    
                    if (auth == "KDI")
                    {

                        Int64 rs = db.Sales_.Where(sl => sl.Serial == Sales.Serial).Count();
                        if (rs == 1)
                        {
                            return Request.CreateErrorResponse(HttpStatusCode.Conflict, " Duplicate Found!");
                        }
                        else
                        {
                            db.Sales_.Add(Sales);
                            db.SaveChanges();
                            return Request.CreateErrorResponse(HttpStatusCode.OK, "Added!");
                        }
//Closing elses cut out for this question.

这工作正常，它接受我的 Json 罚款作为单个对象。

这是我将发布的 Json。

{
  "Serial": 1,
  "ExtSerial": "AH0000002",
  "Date": "2015-03-01",
  "CustomerRefNbr": "JPM0001",
  "Description": "2015 FEBRUARY RENTAL  2015 FEBRUARY RENTAL",
  "Customer": "TRDE0065",
  "Amount": 17989.51,
  "AQ_Branch": "KDI",
  "AQ_COA": "4100503000",
  "LineSubAccount": "OPMOPN000",
  "LineTaxCategory": "JPMTAX",
  "LineQuantity": 1,
  "LineUnitPrice": 400000,
  "AQ_PostStatus": 1,
  "AQ_StatusDate": "2015-03-01",
  "DTS": "2015-03-01",
  "LineDescription": "Line Description"
}

现在，我想在一个 json 对象中发布多个列表或行（不知道如何称呼它们）。像这样的：

    {
      "ExtSerial": "AH0000002",
      "Date": "2015-03-01",
      "CustomerRefNbr": "JPM0001",
      "Description": "2015 FEBRUARY RENTAL  2015 FEBRUARY RENTAL",
      "Customer": "TRDE0065",
      "Amount": 17989.51,
      "AQ_Branch": "KDI",
      "AQ_COA": "4100503000",
      "LineSubAccount": "OPMOPN000",
      "LineTaxCategory": "JPMTAX",
      "LineQuantity": 1,
      "LineUnitPrice": 400000,
      "AQ_PostStatus": 1,
      "AQ_StatusDate": "2015-03-01",
      "DTS": "2015-03-01",
      "LineDescription": "Line Description"
    },{
      "ExtSerial": "AH0000003",
      "Date": "2015-04-01",
      "CustomerRefNbr": "JPM0002",
      "Description": "2015 FEBRUARY RENTAL  2015 FEBRUARY RENTAL",
      "Customer": "TRDE0066",
      " Amount": 17989.51,
      "AQ_Branch": "KDI",
      "AQ_COA": "4100503000",
      "LineSubAccount": "OPMOPN000",
      "LineTaxCategory": "JPMTAX",
      "LineQuantity": 2,
      "LineUnitPrice": 400000,
      "AQ_PostStatus": 1,
      "AQ_StatusDate": "2015-04-01",
      "DTS": "2015-04-01",
      "LineDescription": "Line Description"
}

但不确定在我的 post 方法中会如何阅读。我尝试将参数 Sales 更改为 List<Sales> Sales。我认为这是用于对象中的列表的内容，但我的问题是我的 db.Sales_.Add(Sales); 现在正在产生错误。 （无效参数）不确定如何将 .Add() 与列表一起使用。另外，我无法获取我的销售表列序列的数据，如Int64 rs = db.Sales_.Where(sl => sl.Serial == Sales.Serial).Count();所示

我几乎被卡住了，不知道该怎么做。我希望你不要觉得我的问题很愚蠢。我只是需要你的帮助。我知道这是一个简单的解决方法。

Answer 1

JSON 数组包含在 [] 中，您的 Sales 参数也必须是列表或数组。

将您的方法签名更改为

public HttpResponseMessage PostSales(List<Sales> Sales, [FromUri] string auth)

将您的 json 更改为 [] 之类的包装

[{
      "ExtSerial": "AH0000002",
      "Date": "2015-03-01",
      "CustomerRefNbr": "JPM0001",
      "Description": "2015 FEBRUARY RENTAL  2015 FEBRUARY RENTAL",
      "Customer": "TRDE0065",
      "Amount": 17989.51,
      "AQ_Branch": "KDI",
      "AQ_COA": "4100503000",
      "LineSubAccount": "OPMOPN000",
      "LineTaxCategory": "JPMTAX",
      "LineQuantity": 1,
      "LineUnitPrice": 400000,
      "AQ_PostStatus": 1,
      "AQ_StatusDate": "2015-03-01",
      "DTS": "2015-03-01",
      "LineDescription": "Line Description"
    },{
      "ExtSerial": "AH0000003",
      "Date": "2015-04-01",
      "CustomerRefNbr": "JPM0002",
      "Description": "2015 FEBRUARY RENTAL  2015 FEBRUARY RENTAL",
      "Customer": "TRDE0066",
      " Amount": 17989.51,
      "AQ_Branch": "KDI",
      "AQ_COA": "4100503000",
      "LineSubAccount": "OPMOPN000",
      "LineTaxCategory": "JPMTAX",
      "LineQuantity": 2,
      "LineUnitPrice": 400000,
      "AQ_PostStatus": 1,
      "AQ_StatusDate": "2015-04-01",
      "DTS": "2015-04-01",
      "LineDescription": "Line Description"
}]

现在您只需枚举您的Sales 并单独处理每一个。类似的东西

Parallel.ForEach(Sales, sale => {
//you can clean this up using Any(), instead of Where.. 
//Int64 rs = db.Sales_.Where(sl => sl.Serial == sale.Serial).Count();
    using (var dbContext = new YourDatabaseContext())
    {
                        if (dbContext .Sales_.Any(sl => sl.Serial == sale.Serial))
                        {
                            return;  //ignore duplicates
                        }
                        else
                        {
                            dbContext .Sales_.Add(sale);
                            dbContext .SaveChanges();
                        }
    }
});
return Request.CreateErrorResponse(HttpStatusCode.OK, "Finished");
//you can just return OK considering a duplicate will not break the client.