解决ASP.NET Core Mvc文件上传限制问题实例

public void ConfigureServices(IServiceCollection services)
{
  servicesConfigure<FormOptions>(options =>
  {
    optionsMultipartBodyLengthLimit = 60000000;
  });
}

[AttributeUsage(AttributeTargetsClass | AttributeTargetsMethod, AllowMultiple = false, Inherited = true)]
 public class RequestFormSizeLimitAttribute : Attribute, IAuthorizationFilter, IOrderedFilter
 {
   private readonly FormOptions _formOptions;
 
   public RequestFormSizeLimitAttribute(int valueCountLimit)
   {
     _formOptions = new FormOptions()
     {
       ValueCountLimit = valueCountLimit
     };
   }
 
   public int Order { get; set; }
 
   public void OnAuthorization(AuthorizationFilterContext context)
   {
     var features = contextHttpContextFeatures;
     var formFeature = featuresGet<IFormFeature>();
 
     if (formFeature == null || formFeatureForm == null)
     {
       // Request form has not been read yet, so set the limits
       featuresSet<IFormFeature>(new FormFeature(contextHttpContextRequest, _formOptions));
     }
   }
 }