Asp.net Core 过滤器（AuthorizationFilter，ActionFilter）

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asp.net core 里面的过滤器有这么多（还提供的异步的过滤器）：

IActionFilter

IResourceFilter

IResultFilter

IAuthorizationFilter

IPageFilter

IExceptionFilter

一、身份验证过滤器AuthorizationFilter

1. using Microsoft.AspNetCore.Mvc;
2. using Microsoft.AspNetCore.Mvc.Filters;
3. using System;
4. using System.Collections.Generic;
5. using System.Linq;
6. using System.Threading.Tasks;
8. namespace CoreTest.Filter
9. {
10. public class AuthFilter : Attribute, IAuthorizationFilter
11. {
12. public void OnAuthorization(AuthorizationFilterContext context)
13. {
14. if (context.HttpContext.User.Identity.Name != "1") //只是个示范作用
15. {
16. //未通过验证则跳转到无权限提示页
17. RedirectToActionResult content = new RedirectToActionResult("NoAuth", "Exception",null);
18. context.Result = content;
19. }
20. }
21. }
22. }

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二、行为过滤器ActionFilter

1. using Microsoft.AspNetCore.Mvc.Filters;
2. using System;
3. using System.Collections.Generic;
4. using System.Linq;
5. using System.Text;
6. using System.Threading.Tasks;
7. using ZCommon;
9. namespace CoreTest.Filter
10. {
11. public class OperationLogFilter : Attribute, IActionFilter
12. {
13. public OperationLogFilter(string operType)
14. {
15. this.OperType = operType;
16. }
17. public string Tag { get; set; }
18. public string OperType { get; set; }
19. /// <summary>
20. /// 执行前
21. /// </summary>
22. /// <param name="context"></param>
23. public void OnActionExecuting(ActionExecutingContext context)
24. {
25. LogHelper.WriteLog("参数:" + context.HttpContext.Request.Host, LogType.remark);
26. }
28. /// <summary>
29. /// 执行后
30. /// </summary>
31. /// <param name="context"></param>
32. public void OnActionExecuted(ActionExecutedContext context)
33. {
34. }
36. }
37. }

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来源：https://blog.csdn.net/qq_26900081/article/details/83185182
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