Add full JsonPatch example with ASP.NET Core 3.1 Web API project (#16824)

* Add full JsonPatch example with NetCore 3.1 mvc and webapi project

* remove jsonpatch mvc example

* remove GetJsonPatchInputFormatter

Co-authored-by: Bruce Chen <brucechen@kingstono365.onmicrosoft.com>

Author: kkbruce

aspnetcore/web-api/jsonpatch/samples/3.1/api/Controllers/HomeController.cs

@@ -0,0 +1,105 @@
+using JsonPatchSample.Models;
+using Microsoft.AspNetCore.JsonPatch;
+using Microsoft.AspNetCore.Mvc;
+using System.Collections.Generic;
+using System.Dynamic;
+
+namespace JsonPatchSample.Controllers
+{
+    [Route("jsonpatch/[action]")]
+    [ApiController]
+    public class HomeController : ControllerBase
+    {
+#region snippet_PatchAction
+        [HttpPatch]
+        public IActionResult JsonPatchWithModelState(
+            [FromBody] JsonPatchDocument<Customer> patchDoc)
+        {
+            if (patchDoc != null)
+            {
+                var customer = CreateCustomer();
+
+                patchDoc.ApplyTo(customer, ModelState);
+
+                if (!ModelState.IsValid)
+                {
+                    return BadRequest(ModelState);
+                }
+
+                return new ObjectResult(customer);
+            }
+            else
+            {
+                return BadRequest(ModelState);
+            }
+        }
+        #endregion
+
+        [HttpPatch]
+        public IActionResult JsonPatchWithModelStateAndPrefix(
+            [FromBody] JsonPatchDocument<Customer> patchDoc,
+            string prefix)
+        {
+            var customer = CreateCustomer();
+
+            patchDoc.ApplyTo(customer, ModelState, prefix);
+
+            if (!ModelState.IsValid)
+            {
+                return BadRequest(ModelState);
+            }
+
+            return new ObjectResult(customer);
+        }
+
+        [HttpPatch]
+        public IActionResult JsonPatchWithoutModelState([FromBody] JsonPatchDocument<Customer> patchDoc)
+        {
+            var customer = CreateCustomer();
+
+            patchDoc.ApplyTo(customer);
+
+            return new ObjectResult(customer);
+        }
+
+        [HttpPatch]
+        public IActionResult JsonPatchForProduct([FromBody] JsonPatchDocument<Product> patchDoc)
+        {
+            var product = new Product();
+
+            patchDoc.ApplyTo(product);
+
+            return new ObjectResult(product);
+        }
+
+        #region snippet_Dynamic
+        [HttpPatch]
+        public IActionResult JsonPatchForDynamic([FromBody]JsonPatchDocument patch)
+        {
+            dynamic obj = new ExpandoObject();
+            patch.ApplyTo(obj);
+
+            return Ok(obj);
+        }
+        #endregion
+
+        private Customer CreateCustomer()
+        {
+            return new Customer
+            {
+                CustomerName = "John",
+                Orders = new List<Order>()
+                {
+                    new Order
+                    {
+                        OrderName = "Order0"
+                    },
+                    new Order
+                    {
+                        OrderName = "Order1"
+                    }
+                }
+            };
+        }
+    }
+}

aspnetcore/web-api/jsonpatch/samples/3.1/api/JsonPatchSample.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.1" />
+  </ItemGroup>
+
+
+</Project>

aspnetcore/web-api/jsonpatch/samples/3.1/api/Models/Category.cs

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+using Newtonsoft.Json;
+
+namespace JsonPatchSample.Models
+{
+    public class Category
+    {
+        public string CategoryName { get; set; }
+    }
+}

aspnetcore/web-api/jsonpatch/samples/3.1/api/Models/Customer.cs

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+using System.Collections.Generic;
+
+namespace JsonPatchSample.Models
+{
+    public class Customer
+    {
+        public string CustomerName { get; set; }
+        public List<Order> Orders { get; set; }
+    }
+}

aspnetcore/web-api/jsonpatch/samples/3.1/api/Models/Order.cs

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+namespace JsonPatchSample.Models
+{
+    public class Order
+    {
+        public string OrderName { get; set; }
+        public string OrderType { get; set; }
+    }
+}

aspnetcore/web-api/jsonpatch/samples/3.1/api/Models/Product.cs

@@ -0,0 +1,8 @@
+namespace JsonPatchSample.Models
+{
+    public class Product
+    {
+        public string ProductName { get; set; }
+        public Category ProductCategory { get; set; }
+    }
+}

aspnetcore/web-api/jsonpatch/samples/3.1/api/Program.cs

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+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Hosting;
+
+namespace JsonPatchSample
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            CreateHostBuilder(args).Build().Run();
+        }
+
+        public static IHostBuilder CreateHostBuilder(string[] args) =>
+            Host.CreateDefaultBuilder(args)
+                .ConfigureWebHostDefaults(webBuilder =>
+                {
+                    webBuilder.UseStartup<Startup>();
+                });
+    }
+}

aspnetcore/web-api/jsonpatch/samples/3.1/api/Startup.cs

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+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+
+namespace JsonPatchSample
+{
+    public class Startup
+    {
+        public Startup(IConfiguration configuration)
+        {
+            Configuration = configuration;
+        }
+
+        public IConfiguration Configuration { get; }
+
+        // This method gets called by the runtime. Use this method to add services to the container.
+        public void ConfigureServices(IServiceCollection services)
+        {
+            services.AddControllers()
+                    .AddNewtonsoftJson();
+        }
+
+        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
+        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
+        {
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+            }
+
+            app.UseHttpsRedirection();
+
+            app.UseRouting();
+
+            app.UseAuthorization();
+
+            app.UseEndpoints(endpoints =>
+            {
+                endpoints.MapControllers();
+            });
+        }
+    }
+}

aspnetcore/web-api/jsonpatch/samples/3.1/api/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  }
+}

aspnetcore/web-api/jsonpatch/samples/3.1/api/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  },
+  "AllowedHosts": "*"
+}