转移.net core 3.1，为.NET 5做准备

OpenAuth.Mvc/Models/JobjectModelBinder.cs

@@ -1,4 +1,5 @@
-using System.Web.Mvc;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc.ModelBinding;
 using Newtonsoft.Json.Linq;
 
 namespace OpenAuth.Mvc.Models
@@ -9,17 +10,30 @@ namespace OpenAuth.Mvc.Models
     /// </summary>
     public class JobjectModelBinder :IModelBinder
     {
-        public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
+        public Task BindModelAsync(ModelBindingContext bindingContext)
         {
-            //todo:需要判断前端是否是FormData
             var obj = new JObject();
-            var request = controllerContext.HttpContext.Request;
-            foreach (var key in request.Form.AllKeys)
-            {
-                obj[key] = request.Form[key];
-            }
-            return obj;
-        }
 
+            //// Specify a default argument name if none is set by ModelBinderAttribute
+            //var modelName = bindingContext.BinderModelName;
+            //if (string.IsNullOrEmpty(modelName))
+            //{
+            //    modelName = "obj";
+            //}
+
+            //// Try to fetch the value of the argument by name
+            //var valueProviderResult =
+            //    bindingContext.ValueProvider.GetValue(modelName);
+
+            //这个地方会报StringValues的异常，好奇怪，只能调试源码了
+            var request = bindingContext.HttpContext.Request;
+            foreach (var item in request.Form)
+            {
+                obj[item.Key] = item.Value[0];
+            }
+
+            bindingContext.Result = ModelBindingResult.Success(obj);
+            return Task.CompletedTask;
+        }
     }
 }