EditorFor

EditorFor/EditorFor.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30621.155
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EditorFor", "EditorFor\EditorFor.csproj", "{1257A071-1457-422B-9D74-631EE346B162}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{1257A071-1457-422B-9D74-631EE346B162}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1257A071-1457-422B-9D74-631EE346B162}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1257A071-1457-422B-9D74-631EE346B162}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1257A071-1457-422B-9D74-631EE346B162}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {7E83487D-B9F8-471B-883C-33EC414BB619}
+	EndGlobalSection
+EndGlobal

EditorFor/EditorFor/Controllers/HomeController.cs

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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Logging;
+using EditorFor.Models;
+
+namespace EditorFor.Controllers
+{
+    public class HomeController : Controller
+    {
+
+        public IActionResult Index()
+        {
+            var testModel = new SomeEntity
+            {
+                IntProperty = 123,
+                LongProperty = 1234567890,
+                BoolProperty = true,
+                StringProperty = "Hello",
+                EnumProperty = Models.Enum.Option1,
+                ClassProperty = new NestedClass
+                {
+                    NestedIntProperty = 9,
+                    NestedStringProperty = "World"
+                }
+            };
+            return View(testModel);
+        }
+
+        public IActionResult Privacy()
+        {
+            return View();
+        }
+
+        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+        public IActionResult Error()
+        {
+            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
+        }
+    }
+}

EditorFor/EditorFor/EditorFor.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>

EditorFor/EditorFor/Models/ErrorViewModel.cs

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+using System;
+
+namespace EditorFor.Models
+{
+    public class ErrorViewModel
+    {
+        public string RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+    }
+}

EditorFor/EditorFor/Models/SomeEntity.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace EditorFor.Models
+{
+    public class SomeEntity
+    {
+        public int IntProperty { get; set; }
+        public long LongProperty { get; set; }
+        public bool BoolProperty { get; set; }
+        public string StringProperty { get; set; }
+        public Enum EnumProperty { get; set; }
+        public NestedClass ClassProperty { get; set; }
+    }
+
+    public enum Enum
+    {
+        Option1,
+        Option2,
+        Option3,
+        Option4
+    }
+
+    public class NestedClass
+    {
+        public int NestedIntProperty { get; set; }
+        public string NestedStringProperty { get; set; }
+    }
+}

EditorFor/EditorFor/MyEditorFor.cs

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+using Microsoft.AspNetCore.Html;
+using Microsoft.AspNetCore.Mvc.Rendering;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Threading.Tasks;
+
+namespace EditorFor
+{
+    public static class MyEditorFor
+    {
+        public static IHtmlContent MyEditorForModel(this IHtmlHelper helper, object model)
+        {
+            var content = new HtmlContentBuilder();
+            foreach (var str in GetForm(model))
+            {
+                content.AppendHtml(str);
+            }
+
+            return content;
+        }
+
+        public static IHtmlContent MyEditorForProperty(this IHtmlHelper helper, object obj)
+        {
+            var content = new HtmlContentBuilder();
+            foreach (var str in Process(new PropertyNode(obj)))
+            {
+                content.AppendHtml(str);
+            }
+
+            return content;
+        }
+
+        private static readonly Dictionary<Type, string> InputTypes = new Dictionary<Type, string>
+        {
+            {typeof(int), "number"},
+            {typeof(long), "number"},
+            {typeof(bool), "checkbox"},
+            {typeof(string), "text"}
+        };
+
+        public static IEnumerable<string> GetForm(object obj)
+        {
+            var root = new PropertyNode(obj);
+            foreach (var str in root
+                .Type
+                .GetProperties(BindingFlags.Public | BindingFlags.Instance)
+                .SelectMany(p => Process(new PropertyNode(p.GetValue(obj), p, root))))
+                yield return str;
+        }
+
+        private static IEnumerable<string> Process(PropertyNode node)
+        {
+            yield return $"<div class='editor-label'><label for='{node.Name}'>{node.Name}</label></div>";
+
+            if (InputTypes.Keys.Contains(node.Type))
+            {
+                yield return GetInput(node);
+            }
+            else if (node.Type.IsEnum)
+            {
+                yield return GetSelect(node);
+            }
+            else if (node.Type.IsClass)
+            {
+                node.Parent.CheckType(node.Type);
+                foreach (var str in node
+                    .Type
+                    .GetProperties(BindingFlags.Public | BindingFlags.Instance)
+                    .SelectMany(p => Process(new PropertyNode(p.GetValue(node.Value), p, node))))
+                    yield return str;
+            }
+            else
+            {
+                throw new NotSupportedException("Модель содержит неподдерживаемые свойства");
+            }
+        }
+
+        private static string GetInput(PropertyNode node)
+        {
+            return $"<div class='editor-field'>" +
+                   $"<input " +
+                   $"type='{InputTypes[node.Type]}' " +
+                   $"id='{node.Name}' " +
+                   $"name='{node.Name}' " +
+                   $"value='{node.Value}'" +
+                   $"{Checked(node)}>" +
+                   $"</div>";
+        }
+
+        private static string GetSelect(PropertyNode node)
+        {
+            return $"<div class='editor-field'>" +
+                   $"<select name='{node.Name}'>" +
+                   node
+                       .Type
+                       .GetEnumNames()
+                       .Select(option =>
+                           $"<option value='{option}'{Selected(node, option)}>{option}</option>")
+                       .Aggregate((current, next) => current + next) +
+                   $"</select>" +
+                   $"</div>";
+        }
+
+        private static string Selected(PropertyNode node, string option)
+        {
+            return node.Value.ToString() == option ? " selected" : "";
+        }
+
+        private static string Checked(PropertyNode node)
+        {
+            return node.Type == typeof(bool) &&
+                   (bool)node.Value ? " checked" : "";
+        }
+    }
+
+    class PropertyNode
+    {
+        public string Name { get; }
+        public PropertyNode Parent { get; }
+        public object Value { get; }
+        public Type Type { get; }
+
+        public PropertyNode(object value, PropertyInfo property = null, PropertyNode parent = null)
+        {
+            Value = value;
+            Type = value.GetType();
+            Name = property?.Name;
+            Parent = parent;
+        }
+
+        public void CheckType(Type type)
+        {
+            if (Type == type)
+                throw new NotSupportedException("Произошло зацикливание");
+
+            Parent?.CheckType(type);
+        }
+    }
+}

EditorFor/EditorFor/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace EditorFor
+{
+    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>();
+                });
+    }
+}

EditorFor/EditorFor/Properties/launchSettings.json

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+{
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:51034",
+      "sslPort": 44335
+    }
+  },
+  "profiles": {
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "EditorFor": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:5001;http://localhost:5000",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

EditorFor/EditorFor/Startup.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.HttpsPolicy;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+
+namespace EditorFor
+{
+    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.AddControllersWithViews();
+        }
+
+        // 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();
+            }
+            else
+            {
+                app.UseExceptionHandler("/Home/Error");
+                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
+                app.UseHsts();
+            }
+            app.UseHttpsRedirection();
+            app.UseStaticFiles();
+
+            app.UseRouting();
+
+            app.UseAuthorization();
+
+            app.UseEndpoints(endpoints =>
+            {
+                endpoints.MapControllerRoute(
+                    name: "default",
+                    pattern: "{controller=Home}/{action=Index}/{id?}");
+            });
+        }
+    }
+}