If you have a pending operation, eg stream.BeginRead(_buffer, 0, _buffer.Length, _asyncCallbackRead, this); and you close the stream provider, eg serialPort.Close(); you unsurprisingly cause an exception. Is there an preferred method by which one might cancel a pending APM operation, prior to closing the port? Colby's reply is...
If I want to read or write a file I could use stream.BeginRead and stream.EndRead, but that requires callbacks and a LOT of ugly, complicated code using the asynchronous programming model. Why would I want to use these asynchronous IO methods (that use the .NET threadpool behind the scenes) than write the same code in a synchronous styl...
Hello all, I am doing some refactoring on a piece of code to transform all blocking operations to their async counterparts. My code is in C# and is doing an UPnP query followed by an HTTP query. For this, I use the APM methods of UdpClient and WebClient (BeginReceive, and so on). My single method is now a succession of Call_1 -> Callba...
Let's say I have code that uses the Asynchronous Programming Model, i.e. it provides the following methods as a group which can be used synchronously or asynchronously: public MethodResult Operation(<method params>); public IAsyncResult BeginOperation(<method params>, AsyncCallback callback, object state); public MethodResult EndOperat...
I have ASP.NET website, and it calls the asmx web-service to do some operation asynchronously _service.Beginxxx(request, null, null); which will run in separate thread (created by thread pool), what if the user close the browser, is this method still keep running and eventually do what I am expecting or it will abort? ...
I have an application which is CPU intensive. When the data is processed on a single thread, the CPU usage goes to 100% for many minutes. So the performance of the application appears to be bound by the CPU. I have multithreaded the logic of the application, which result in an increase of the overall performance. However, the CPU usage h...
Even with my Googling powers I cannot seem to find a good example of the Asynchronous Programming Model with a callback delegate. It is easy for me to point someone to a resource for how to use the BeginSomeMethod and EndSomeMethod but there does not seem to be any good examples of how to create them. Am I googling wrong or has no one ...
The code is not complete (It does not build), as I am not able to get the "item" in the following line in the WriteResponseData(). HttpWebResponse WebResp = (HttpWebResponse)item.EndGetResponse(result); I must be missing something. Please point out. below is the complete code:- static string[] imageUris = { "http://www.crici...
I am looking for an application performance management for PHP (see http://en.wikipedia.org/wiki/Application_performance_management) This tool could be plugged to any php application in production, and can collect/display statistic about php execution time, network time, db query time for each request. For each indicator, i would like t...