目录
8.webconfig的配置移植到appsettings.json
13.使用session和解决sessionID一直变化的问题
1.获取请求的参数
NET Framework版本:
- Request["xxx"];
- Request.Files[0];
NET Core版本:
- Request.Form["xxx"];
- Request.Form.Files[0];
2.获取完整的请求路径
NET Framework版本:
Request.RequestUri.ToString();
NET Core版本:
- //先添加引用
- using Microsoft.AspNetCore.Http.Extensions;
- //再调用
- Request.GetDisplayUrl();
3.获取域名
NET Framework版本:
HttpContext.Current.Request.Url.Authority
NET Core版本:
HttpContext.Request.Host.Value
4.编码
NET Framework版本:
- System.Web.HttpContext.Current.Server.UrlEncode("<li class=\"test\"></li>")
- "%3cli+class%3d%22test%22%3e%3c%2fli%3e"
- System.Web.HttpContext.Current.Server.UrlDecode("%3cli+class%3d%22test%22%3e%3c%2fli%3e")
- "<li class=\"test\"></li>"
NET Core版本:
- //两种方法,建议用System.Web.HttpUtility
- System.Web.HttpUtility.UrlEncode("<li class=\"test\"></li>");
- "%3cli+class%3d%22test%22%3e%3c%2fli%3e"
- System.Web.HttpUtility.UrlDecode("%3cli+class%3d%22test%22%3e%3c%2fli%3e");
- "<li class=\"test\"></li>"
-
- System.Net.WebUtility.UrlEncode("<li class=\"test\"></li>")
- "%3Cli+class%3D%22test%22%3E%3C%2Fli%3E"
- System.Net.WebUtility.UrlDecode("%3Cli+class%3D%22test%22%3E%3C%2Fli%3E")
- "<li class=\"test\"></li>"
- System.Net.WebUtility.UrlDecode("%3cli+class%3d%22test%22%3e%3c%2fli%3e")
- "<li class=\"test\"></li>"
-
5.文件上传的保存方法
NET Framework版本:
- var file = Request.Files[0];
- //blockFullPath指保存的物理路径
- file.SaveAs(blockFullPath);
NET Core版本:
- var file = Request.Form.Files[0];
- //blockFullPath指保存的物理路径
- using (FileStream fs = new FileStream(blockFullPath, FileMode.CreateNew))
- {
- file.CopyTo(fs);
- fs.Flush();
- }
6.获取物理路径
NET Framework版本:
- //作为一个全局变量获取物理路径的方法
- public string ffmpegPathc = System.Web.Hosting.HostingEnvironment.MapPath("~/Content/ffmpeg/ffmpeg.exe");
- //获取在控制器的构造函数里直接调用Server.MapPath
- ffmpegPathc = Server.MapPath("~/Content/ffmpeg/ffmpeg.exe");
NET Core版本:
从ASP.NET Core RC2开始,可以通过注入 IHostingEnvironment 服务对象来取得Web根目录和内容根目录的物理路径。代码如下:
- [Area("Admin")]
- public class FileUploadController : Controller
- {
- private readonly IHostingEnvironment _hostingEnvironment;
-
- public string ffmpegPathc = "";//System.Web.Hosting.HostingEnvironment.MapPath("~/Content/ffmpeg/ffmpeg.exe");
-
- public FileUploadController(IHostingEnvironment hostingEnvironment)
- {
- _hostingEnvironment = hostingEnvironment;
- ffmpegPathc = _hostingEnvironment.WebRootPath + "/Content/ffmpeg/ffmpeg.exe";
- }
- }
这样写每个控制器就都要写一个构造函数,很麻烦,所以可以把它抽离出来,写个公共类去调用。代码如下:
先自定义一个静态类:
- using Microsoft.AspNetCore.Hosting;
- using Microsoft.Extensions.DependencyInjection;
- using System;
-
- namespace GDSMPlateForm
- {
- public static class HttpHelper
- {
- public static IServiceProvider ServiceProvider { get; set; }
-
- public static string GetServerPath(string path)
- {
- return ServiceProvider.GetRequiredService<IHostingEnvironment>().WebRootPath + path;
- }
- }
- }
然后 在startup类下的Configure 方法下:
HttpHelper.ServiceProvider = app.ApplicationServices;
startup下的ConfigureServices放下注册方法(这一步必不可少,但是这里可以不写,因为IHostingEnvironment 是微软默认已经帮你注册了,如果是自己的服务,那么必须注册)。
services.AddSingleton<IHostingEnvironment, HostingEnvironment>();
最后获取物理路径就可以这样直接调用了:
public string ffmpegPathc = HttpHelper.GetServerPath("/Content/ffmpeg/ffmpeg.exe");
7.返回Json属性大小写问题
NET Core返回Json属性默认都会自动转为小写,但项目之前Json属性有些是大写的,所以需要配置成不转化为小写的形式。
Startup.cs的ConfigureServices方法下添加一行代码:
- //Startup需要添加引用
- using Newtonsoft.Json.Serialization;
- //返回Json属性默认大小写
- services.AddMvc().AddJsonOptions(o => { o.SerializerSettings.ContractResolver = new DefaultContractResolver(); });
8.webconfig的配置移植到appsettings.json
NET Framework版本:
直接可以读取webconfig配置文件:
string format = System.Configuration.ConfigurationManager.AppSettings["format"].ToString();
NET Core版本:
NET Core不再支持web.config,取而代之的是appsettings.json,所以需要把一些配置移植过去。
例如web.config下的一些配置
- <appSettings>
- <add key="ismdb" value="" />
- <add key="webpath" value="" />
- <add key="format" value="jpg,jpeg,png,gif,bmp,tif,svg/mp3,wav/mp4,avi,mpg,wmv,mkv,rmvb,mov,flv/zip/.ppt,.pptx" />
- <add key="imagesize" value="5242880" />
- <!--1024 * 1024 * 5 -->
- <add key="musicsize" value="20971520" />
- <!--1024 * 1024 * 20 -->
- <add key="mediasize" value="20971520" />
- <!--1024 * 1024 * 20 -->
- <add key="packagesize" value="0" />
- <add key="pptsize" value="0" />
- </appSettings>
移植到appsettings.json
- {
- "Logging": {
- "IncludeScopes": false,
- "LogLevel": {
- "Default": "Warning"
- }
- },
- "webpath": "",
- "format": "jpg,jpeg,png,gif,bmp,tif,svg/mp3,wav/mp4,avi,mpg,wmv,mkv,rmvb,mov,flv/zip/.ppt,.pptx",
- "imagesize": "5242880",
- "musicsize": "20971520",
- "mediasize": "20971520",
- "packagesize": "0",
- "pptsize": "0"
- }
然后编写一个类去调用这个appsettings.json
- using Microsoft.Extensions.Configuration;
- using System.IO;
-
- namespace GDSMPlateForm
- {
- public class RConfigureManage
- {
- public static string GetConfigure(string key)
- {
-
- //添加 json 文件路径
- var builder = new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile("appsettings.json");
- //创建配置根对象
- var configurationRoot = builder.Build();
-
- //取配置根下的 name 部分
- string secvalue = configurationRoot.GetSection(key).Value;
- return secvalue;
- }
- }
- }
调用的方式:
string format = RConfigureManage.GetConfigure("format");
9.设置区域块MVC的路由器和访问区域块的视图
NET Framework版本:
NET Framework新建一个区域会自带一个类设置路由器的,如图:
- using System.Web.Mvc;
-
- namespace GDSMPlateForm.Areas.Admin
- {
- public class AdminAreaRegistration : AreaRegistration
- {
- public override string AreaName
- {
- get
- {
- return "Admin";
- }
- }
-
- public override void RegisterArea(AreaRegistrationContext context)
- {
- context.MapRoute(
- "Admin_default",
- "Admin/{controller}/{action}/{id}",
- new { action = "Index", id = UrlParameter.Optional }
- );
- }
- }
- }
NET Core版本:
NET Core新建一个区域不会自带一个类用于设置路由器,所以需要在Startup类的Configure方法里多加一条路由器设置
- app.UseMvc(routes =>
- {
- routes.MapRoute(
- name: "areas",
- template: "{area:exists}/{controller=Home}/{action=Index}/{id?}"
- );
- });
然后需要在每个控制器下添加一个标签,指定该控制器属于哪个区域的,如图:
不加的话访问不到区域的视图,报404错误。
10.NetCore访问静态资源文件
NET Framework版本:
NET Framework可以在webconfig下配置这些静态资源文件
- <staticContent>
- <mimeMap fileExtension="." mimeType="image/svg+xml" />
- <mimeMap fileExtension=".properties" mimeType="application/octet-stream" />
- </staticContent>
NET Core版本:
NET Core并没有webconfig,所以需要在Startup类的Configure方法里自己配置。
NET Core项目默认的资源文件存在wwwroot下,可以通过app.UseStaticFiles方法自己定义资源文件的路径还有类型。
- var provider = new FileExtensionContentTypeProvider();
- provider.Mappings[".properties"] = "application/octet-stream";
- app.UseStaticFiles(new StaticFileOptions
- {
- FileProvider = new PhysicalFileProvider(
- Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", "Content")),
- RequestPath = "/Content",
- ContentTypeProvider = provider
- });
11.MVC调用子页视图
NET Framework版本:
@Html.Action("UserBackView", "UserManage")
NET Core版本:
NET Core不再支持Html.Action(),不过可以手动自己去实现它。
自定义一个静态类 HtmlHelperViewExtensions,命名空间设置为 Microsoft.AspNetCore.Mvc.Rendering。网上找的一个类,复制过来就行了,如下:
- using Microsoft.AspNetCore.Html;
- using Microsoft.AspNetCore.Http;
- using Microsoft.AspNetCore.Mvc.Infrastructure;
- using Microsoft.AspNetCore.Routing;
- using Microsoft.Extensions.DependencyInjection;
- using System;
- using System.IO;
- using System.Threading.Tasks;
-
- namespace Microsoft.AspNetCore.Mvc.Rendering
- {
- public static class HtmlHelperViewExtensions
- {
- public static IHtmlContent Action(this IHtmlHelper helper, string action, object parameters = null)
- {
- var controller = (string)helper.ViewContext.RouteData.Values["controller"];
-
- return Action(helper, action, controller, parameters);
- }
-
- public static IHtmlContent Action(this IHtmlHelper helper, string action, string controller, object parameters = null)
- {
- var area = (string)helper.ViewContext.RouteData.Values["area"];
-
- return Action(helper, action, controller, area, parameters);
- }
-
- public static IHtmlContent Action(this IHtmlHelper helper, string action, string controller, string area, object parameters = null)
- {
- if (action == null)
- throw new ArgumentNullException("action");
-
- if (controller == null)
- throw new ArgumentNullException("controller");
-
-
- var task = RenderActionAsync(helper, action, controller, area, parameters);
-
- return task.Result;
- }
-
- private static async Task<IHtmlContent> RenderActionAsync(this IHtmlHelper helper, string action, string controller, string area, object parameters = null)
- {
- // fetching required services for invocation
- var serviceProvider = helper.ViewContext.HttpContext.RequestServices;
- var actionContextAccessor = helper.ViewContext.HttpContext.RequestServices.GetRequiredService<IActionContextAccessor>();
- var httpContextAccessor = helper.ViewContext.HttpContext.RequestServices.GetRequiredService<IHttpContextAccessor>();
- var actionSelector = serviceProvider.GetRequiredService<IActionSelector>();
-
- // creating new action invocation context
- var routeData = new RouteData();
- foreach (var router in helper.ViewContext.RouteData.Routers)
- {
- routeData.PushState(router, null, null);
- }
- routeData.PushState(null, new RouteValueDictionary(new { controller = controller, action = action, area = area }), null);
- routeData.PushState(null, new RouteValueDictionary(parameters ?? new { }), null);
-
- //get the actiondescriptor
- RouteContext routeContext = new RouteContext(helper.ViewContext.HttpContext) { RouteData = routeData };
- var candidates = actionSelector.SelectCandidates(routeContext);
- var actionDescriptor = actionSelector.SelectBestCandidate(routeContext, candidates);
-
- var originalActionContext = actionContextAccessor.ActionContext;
- var originalhttpContext = httpContextAccessor.HttpContext;
- try
- {
- var newHttpContext = serviceProvider.GetRequiredService<IHttpContextFactory>().Create(helper.ViewContext.HttpContext.Features);
- if (newHttpContext.Items.ContainsKey(typeof(IUrlHelper)))
- {
- newHttpContext.Items.Remove(typeof(IUrlHelper));
- }
- newHttpContext.Response.Body = new MemoryStream();
- var actionContext = new ActionContext(newHttpContext, routeData, actionDescriptor);
- actionContextAccessor.ActionContext = actionContext;
- var invoker = serviceProvider.GetRequiredService<IActionInvokerFactory>().CreateInvoker(actionContext);
- await invoker.InvokeAsync();
- newHttpContext.Response.Body.Position = 0;
- using (var reader = new StreamReader(newHttpContext.Response.Body))
- {
- return new HtmlString(reader.ReadToEnd());
- }
- }
- catch (Exception ex)
- {
- return new HtmlString(ex.Message);
- }
- finally
- {
- actionContextAccessor.ActionContext = originalActionContext;
- httpContextAccessor.HttpContext = originalhttpContext;
- if (helper.ViewContext.HttpContext.Items.ContainsKey(typeof(IUrlHelper)))
- {
- helper.ViewContext.HttpContext.Items.Remove(typeof(IUrlHelper));
- }
- }
- }
- }
- }
然后在Startup中的 ConfigureServices 方法添加:
- services.AddSingleton<IHttpContextAccessor, HttpContextAccessor();
- services.AddSingleton<IActionContextAccessor, ActionContextAccessor>();
这样就可以像NET Framework版本一样去调用子页面视图了:
@Html.Action("UserBackView", "UserManage")
12.过滤器
NET Framework版本
NET Framework版本上Global.asax中Application_Start方法可以做很多配置,过滤器也是其中一种。
- protected void Application_Start()
- {
- AreaRegistration.RegisterAllAreas();
- FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);//全局过滤器集合
- RouteConfig.RegisterRoutes(RouteTable.Routes);
- BundleConfig.RegisterBundles(BundleTable.Bundles);
- }
-
- public class FilterConfig
- {
- public static void RegisterGlobalFilters(GlobalFilterCollection filters)
- {
- filters.Add(new HandleErrorAttribute());
- filters.Add(new LoginCheckFilterAttribute() { IsCheck = true });//自定义一个过滤器
- }
- }
-
- //继承过滤器基类并重写方法
- public class LoginCheckFilterAttribute : ActionFilterAttribute
- {
- //表示是否检查
- public bool IsCheck { get; set; }
- //Action方法执行之前执行此方法
- public override void OnActionExecuting(ActionExecutingContext filterContext)
- {
- base.OnActionExecuting(filterContext);
- if (IsCheck)
- {
- //添加自己的逻辑
- }
- }
- }
NET Core版本:
NET Core不在支持Global.asax,很多配置写在Startup里。过滤器的添加方法如下:
- public void ConfigureServices(IServiceCollection services)
- {
- services.AddMvc(options =>
- {
- options.Filters.Add(typeof(AuthorizationFilters));// 自定义一个类AuthorizationFilters,添加身份验证过滤器
- });
- }
-
- /// <summary>
- /// 身份认证类继承IAuthorizationFilter接口
- /// </summary>
- public class AuthorizationFilters :IAuthorizationFilter
- {
- /// <summary>
- /// 请求验证,当前验证部分不要抛出异常,ExceptionFilter不会处理
- /// </summary>
- /// <param name="context">请求内容信息</param>
- public void OnAuthorization(AuthorizationFilterContext context)
- {
- //写自己的逻辑
- }
- }
13.使用session和解决sessionID一直变化的问题
NET Core版本:
在Startup类里添加session配置
- public void ConfigureServices(IServiceCollection services)
- {
- services.AddDistributedMemoryCache();
- services.AddSession(option =>
- { //设置session过期时间
- option.IOTimeout = TimeSpan.FromHours(1);
- option.IdleTimeout = TimeSpan.FromHours(1);
- });
- services.AddMvc();
- }
-
- public void Configure(IApplicationBuilder app, IHostingEnvironment env, IServiceProvider svp)
- {
- app.UseSession();//必须在app.UseMvc之前,否则报错
- app.UseMvc(routes =>
- {
- routes.MapRoute(
- name: "default",
- template: "{controller=Home}/{action=Index}/{id?}");
- });
- }
配置完成后session就可以使用了,不过当Session保存有值,id才不会改变,没有值每次刷新都会变,可以给在使用session时可以给session随便赋个值以保证sessionid不会一直变化。
- HttpContext.Session.Set("login", Encoding.UTF8.GetBytes("login"));
- string sessionid = HttpContext.Session.Id;
14.MD5加密
NET Framework版本:
- //参数str类型是string
- System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5");
NET Core版本:用以下这个方法替换了
- /// <summary>
- /// 32位MD5加密
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- private static string Md5Hash(string input)
- {
- MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
- byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));
- StringBuilder sBuilder = new StringBuilder();
- for (int i = 0; i < data.Length; i++)
- {
- sBuilder.Append(data[i].ToString("x2"));
- }
- return sBuilder.ToString();
- }
15.Path.Combine()
该方法是路径拼接,在NET Framework版本和NET Core版本同样支持,不过用Path.Combine拼接出来的路径是这样的:xxxx\\xxxx,用的是“\\”,这种路径在Window系统上可以正常运行,但是在Linux上是无法定位到准确的路径的。Linux上的路径是这样的:xxxx/xxxx。所以当我们用Path.Combine这个方法时最好再配合一个替换方法:
Path.Combine(path1,path2).Replace("\\","/");
16.DateTime
donet core 2.1 DateTime.Now.ToString() 方法在不同平台返回的时间格式不一样,即使使用ToString("yyyy/MM/dd")希望转成‘2019/04/18‘这种格式,但在Centos7平台下它还是变成了‘2019-04-18’这样,可以考虑用Replace方法去替换。
NET Framework项目移植到NET Core上遇到的一系列坑
原文:https://www.cnblogs.com/lonelyxmas/p/12001657.html