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.NET Matters: Asynchronous HttpWebRequests, Interface Implementation, and More

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

More Related Resource Links

.NET Matters: Asynchronous I/O with WebClient


In this month's installment of .NET Matters, columnist Stephen Toub answers reader questions concerning asynchronous I/O .

Stephen Toub

MSDN Magazine July 2008

.NET Matters: Asynchronous Stream Processing


This month Stephen Toub discusses asynchronous stream processing.

Stephen Toub

MSDN Magazine March 2008

INotifyPropertyChanged, explicit interface implementation and binding

Hello. Can I notify about explicitly implemented property change and what name should I provide to PropertyChanged? Or does WPF support onetime binding only for them?

Asynchronous requests in WCF service implementation, any support like ASP.NET asynchronous pages?

What if my WCF service implementation executes some IO operation which may take a while, say 5 seconds.  Ideally I would like to return the thread executing this service request back to the pool to handle other incoming requests while I'm waiting on the IO.  ASP.NET introduced asynchronous pages to address this issue (http://msdn.microsoft.com/en-us/magazine/cc163725.aspx).  This allows for much better resource use and improves the responsiveness of the server.  Does the WCF hosting service allow for something similar? Thanks, Nick

Interface implementation in C#



Good evenning all,

can anybody tell me what is practical use of interface.

plase give an example where with out interface developement can not be done.

Thanks to all.

use of foreach with explicit interface implementation?


Hi, so on msdn page


They say


The disadvantage of omitting IEnumerable and IEnumerator [in C#] is that the collection class is no longer interoperable with the foreach statements, or equivalents, of other common language runtime-compatible languages.

You can have the best of both worlds, type-safety within C# and interoperability with other common language runtime-compatible languages, by inheriting from IEnumerable and IEnumerator and using explicit interface implementation as demonstrated in the following example.



But the example they show right beneath that, does it actually contain any explicit

jQuery $(document).ready() and ASP.NET Ajax asynchronous postback

Many call it the ASP.NET jQuery postback problem, but using the technique below should make it no problem anymore. $(document).ready() isn't called after an asynchronous postback. What this means? You lose the functionality that should be executed within $(document).ready() after an UpdatePanel rendered its contents after an asynchronous postback.

jQuery Date picker Implementation in ASP.NET

I've posted a wrapper ASP.NET around the jQuery.UI Datepickercontrol. This small client side calendar control is compact, looks nice and is very easy to use and I've added it some time back to my control library.

This is primarily an update for the jQuery.ui version, and so I spend a few hours or so cleaning it up which wasn't as easy as it could have been since the API has changed quite drastically from Marc's original implementation. The biggest changes have to do with the theming integration and the resulting explosion of related resources.

If you want to use this component you can check it out a sample and the code here:

jQuery live() and ASP.NET Ajax asynchronous postback

The issue is that normally $(document).ready() is called when the DOM is ready to be manipulated. But this doens't happen after an ASP.NET Ajax asynch postback occurs.

This means that the initial jQuery bindings won't be automatically available after the asynchronous postback is over. I underline "automatically" here because my last post describes more possibilities, how this issue can be worked around.

database interface design question


For handy database interface, is it good to use SqldataSources exclusively intead of EntLib functions?

Thanks for any feedback.

RSS implementation code - need suggestion


Please suggest what is the best approach of coding for RSS implementation,


Implementation 1:

a) Add custom handler in web.config for .rss type

b) Create a handler class (RSSHandler.cs) in APP_Code

c) Create a Sample.rss file

d) Browse Sample.rss in browser

 Technical Solution:Utility Classes:I)                   

Debug implementation of URLrewriter.net



After some googling and help from the forum, I have integrated the the URLrewrting.net in my project. There are no error when I build the project, but the URL rewriting does not work. I am able to figure ot where the problem is. Is there a way to debug this. The code is as below:

 Web.config file

<?xml version="1.0"?>
    Note: As an alternative to hand editing this file you can use the 
    web admin tool to configure settings for your application. Use
    the Website->Asp.Net Configuration option in Visual Studio.
    A full list of settings and comments can be found in 
    machine.config.comments usually located in 
		<sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
			<sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
				<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.W

WCF The Security Support Provider Interface (SSPI) negotiation failed


I am using a wcf service that I created, when both hosting machine and the client machine are on the same domain everything works just fine. When I publish the client app to the webserver in the DMZ I am getting the following error:

SOAP security negotiation with '' for   
'' failed. See inner exception  
for more details.The Security Support Provider Interface (SSPI) negotiation failed.

Here is my service main where I set up the service


 Uri baseAddress = new Uri("Http://");
      ServiceHost selfHost = new ServiceHost(typeof(QBService), baseAddress);


Cutting Edge: Revisiting Asynchronous ASP.NET Pages


If you need to scale up an existing Web application, you should first look to asynchronous operations, says Dino Esposito. He explains how new features coming in ASP.NET MVC 2 make this easier.

Dino Esposito

MSDN Magazine April 2010

.NET Matters: Aggregating Exceptions


Exceptions in .NET are the fundamental mechanism by which errors and other exceptional conditions are communicated. This month's column provides information about how to aggregate exceptions to help manage a variety of scenarios in which multiple exceptions might result from one operation, including scenarios involving parallelism and concurrency.

Stephen Toub

MSDN Magazine August 2009

Concurrent Affairs: Solving The Dining Philosophers Problem With Asynchronous Agents


We use the new Asynchronous Agents Library in Visual C++ 2010 to solve the classic Dining Philosophers concurrency problem.

Rick Molloy

MSDN Magazine June 2009

.NET Matters: Parallelizing Operations With Dependencies


In this month's installment, Stephen Toub examines some techniques for enforcing dependencies in the running order of asynchronous operations and builds a DependencyManagement class to help.

Stephen Toub

MSDN Magazine April 2009

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