JobjectModelBinder.cs
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using Microsoft.AspNetCore.Mvc.ModelBinding;
using Newtonsoft.Json.Linq;
using System.Threading.Tasks;
namespace WebMvc
{
/// <summary>
/// 将前端传来的FormData数据转为Jobject类型
/// 注：前端如果是application/json，可以直接转JOjbect！
/// </summary>
public class JobjectModelBinder :IModelBinder
{
public Task BindModelAsync(ModelBindingContext bindingContext)
{
var obj = new JObject();
//// 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;
}
}
}