OData v4.0 - 将值更改为结果答案

【问题标题】：OData v4.0 - Change value to resultsOData v4.0 - 将值更改为结果
【发布时间】：2019-04-04 15:59:52
【问题描述】：

我目前正在编写 API，但这次，客户端是第 3 方。幸运的是，它有据可查，但我有 1 个特殊问题。客户期望这样的 json：

{      "results":[         {            "Id":"2C9E76EF-2532-4CA5-B4C6-03E39A31867A",          "Code":1,          "Name":"Optimizers B.V.",          "VatCode":"96541122",          "ChamberOfCommerceCode":"28084551",          "LanguageCode":"NL",          "Discount":2.35,          "CustomerManager":"Robin van Halen",          "PriceList":"7208812F-EEDA-4345-B3C6-1F1A960558C1",          "PaymentCondition":"7BA77586-3A3A-4D07-8DB8-2188F48BD68A",          "VatLiable":true       }}

我正在使用 OData，因为我需要将 OData 用于可查询选项。但是，我的结果集完全不同：

{
    "@odata.context": "http://localhost:52973/odata/$metadata#Customers",
    "value": [ {            "Id":"2C9E76EF-2532-4CA5-B4C6-03E39A31867A",          "Code":1,          "Name":"Optimizers B.V.",          "VatCode":"96541122",          "ChamberOfCommerceCode":"28084551",          "LanguageCode":"NL",          "Discount":2.35,          "CustomerManager":"Robin van Halen",          "PriceList":"7208812F-EEDA-4345-B3C6-1F1A960558C1",          "PaymentCondition":"7BA77586-3A3A-4D07-8DB8-2188F48BD68A",          "VatLiable":true       }}

区别是

"@odata.context": "http://localhost:52973/odata/$metadata#Customers",
"value": [ ....

我在支持部门提出了这个问题，他们回答说我需要将值更改为结果才能使其发挥作用。但是我该如何更改呢？我不完全确定该怎么做。

我尝试了一些像这样的肮脏黑客：

 public IQueryable<Customer> Get()
        {
            var AllCusts = GetAllCustomers(); //this is of type IQueryable
            //Test in order to change value to results

            var x = JsonConvert.SerializeObject(AllCusts, Formatting.Indented);
            var xyz = JsonConvert.DeserializeObject<List<Customer>>(x.Replace("value", "Results"));

            var asQuery = xyz.AsQueryable();


            return asQuery;
        }

但是很遗憾，结果集还是一样的。

【问题讨论】：

标签： c# api asp.net-core .net-core odata

【解决方案1】：

为了让其他人出于某种原因不得不重命名该值..这是我设法做到的：

   // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            // Add middleware before MVC
            app.Use(async (ctx, next) =>
            {
                // Capture the original response body stream
                var responseStream = ctx.Response.Body;

                // Replace it with our own, so that we can read it
                using (var bodyStream = new MemoryStream())
                {
                    ctx.Response.Body = bodyStream;


                    // Run ASP.NET MVC (ie. get the results back from your code)
                    await next();

                    // Put the original response body stream back
                    ctx.Response.Body = responseStream;

                    // Read the one that we captured
                    bodyStream.Seek(0, SeekOrigin.Begin);
                    var responseBody = await new StreamReader(bodyStream).ReadToEndAsync();

                    // If it's ODATA & JSON & 200 (success), replace the "value" with "results"
                    if (ctx.Response.ContentType.Contains("application/json") && ctx.Response.ContentType.Contains("odata") && ctx.Response.StatusCode == 200)
                    {
                        responseBody = responseBody.Replace("\"value\"", "\"results\"");
                    }

                    // Write back the response body (whether modified or not) to the original response stream
                    await ctx.Response.WriteAsync(responseBody);
                }
            });

【讨论】：