public static HttpContext Current { get { if (instance.Value == null) { instance = new ThreadLocal<HttpContext>(() => new HttpContext()); } return (HttpContext)instance.Value; } } protected static ThreadLocal<HttpContext> instance;…

今天在对项目代码进行异步化改进的时候,遇到一个奇怪的问题(莫笑,以前没遇过),正如标题一样,HttpContext.Current 在 await 异步执行之后,就会变为 null. 演示代码: public async Task<IEnumerable<string>> Get() { await DoWaitAsync(); DoWork(); return new string[] { "value1", "value2" }; } p…

HttpContext = (context == null ? new HttpContextWrapper(System.Web.HttpContext.Current) : context);…

Why is HttpContext.Current null during the Session_End event? On Session_End there is no communication necessarily involved with the browser so there is no HttpContext to refer to which explains why it is null. Looking at your code you seem to be int…

摘要 HttpContext上下文并不是无处不在的.详情可以看下Fish Li的文章,解释的比较清楚. HttpContext.Current并非无处不在 问题复现 public async Task<ActionResult> Home() { return await Task.Factory.StartNew(() => { var context = System.Web.HttpContext.Current; System.Web.HttpContext context2 =…

直接new一个 HttpContextBase _HttpContext= new HttpContextWrapper(System.Web.HttpContext.Current);…

HttpContext context1 = System.Web.HttpContext.Current; HttpContext context2 = System.Runtime.Remoting.Messaging.CallContext.HostContext as HttpContext;  //当前(请求)线程上下文 bool isEqual = object.ReferenceEquals(context1, context2); Response.Write("context1…

做项目的时候,System.Web.HttpContext.Current.Server.MapPath("~/upload/SH")   获取路径本来这个方法用的好好的 因为需要实时的输出日志,我就使用了多线程,System.Web.HttpContext.Current.Server.MapPath()    他就报  未将对象引用设置为实例对象 在网上 找到 别人写的下面的方法 挺好用的 public static string MapPath(string strPath) {…

多线程中的System.Web.HttpContext.Current.Server.MapPath("/") 多线程中Server.MapPath会失效... 网上找到几种解决方法,现在整理如下: 第一种: System.Web.HttpContext.Current.Server.MapPath("/")  这个常用来表示网站的根目录,但是在多线程中,会发生未将对象引用设置到对象的实例. 所以不要分布在不同的类中,尽量在一个全局位置,然后其它类共用这个,毕竟网站…

在多线程中使用该方法获取目录报错:未将对象设置到引用 #region 上传图片到腾讯 public async Task<Result> UploadImageToWX(string background_pic_url) { var _result = new Result(); var token = GetWxGhAuthorizerAccessToken(AbpSession.ShopId); if (!token.success) { _result.Code = ; _result…