Anytao.net

[xRM], Find xRM in PDC09

anytao — Mon, 08 Feb 2010 09:19:00 GMT

If you ask question like “What’s new in xRM”, It’s limited resource currently. In PDC09, there are about 4 different sessions have related with the next version of Microsoft Dynamic CRM 5, codename as “xRM”. Here are some list for these sessions: Managing...(read more)

[xRM], Introuduction show about xRM

anytao — Mon, 08 Feb 2010 09:09:00 GMT

A great introduction about xRM show is published in youtube, have a look. Tao | 你必须知道的.NET www.anytao.com |*: anytao@live.com | Twitter: http://twitter.com/anytao | Blog: http://anytao.cnblogs.com/...(read more)

Localization solution in Silverlight

anytao — Thu, 05 Feb 2009 10:30:00 GMT

Localization is a typcal keynote in Silverlight App. Unfortunately, silverlight 2 didn’t have enough support to localization. We can not get a solution complete same as ASP.NET Apps. So here give us a hot example show how to implement localization in Silverlight. Of course, I still expect improvement in next release....(read more)

Hot Find #1, Dec 2008

anytao — Tue, 30 Dec 2008 02:48:00 GMT

Published 30 Dec 2008, by Anytao © 2008 Anytao.com , A fun world for making tech as art. Hot Find will be the most popular articals or funny technical find about .NET world, it shares ideas and knowledges from web and give us more guide support. Tommorrow...(read more)

Tips: Better GetXXByYY in LINQ

anytao — Tue, 21 Oct 2008 16:26:00 GMT

In a post Creating the Table Adapter Methods for GetUserByLogin, GetUserByUserName, and InsertUser, Nannette Thacker gives a good way to implement a table adapter for solving GetXXByYY in coding repeat works. Indeed, it’s very populating to implement the GetUserByName, GetUserByID, GetUserByEmail or ValidateUser and so on. So usually, you need to implement different services for UI calling, but there service basically has same implement process...(read more)

Tips: Using Reflection to assign value intelligently

anytao — Fri, 26 Sep 2008 06:24:00 GMT

Usually, we map data from DB into models in for DAL. Of cource, we aslo encapsulate the models into Business Object(BO) or Domain Object(DO) for BLL. That's usual design affairs. In the case of design, different layers make a clear organize about business logic from data, service and so on. However, it's unavoidable to pass value from Models to BOs to run business logic or pass value from BOs to Models to save data. This is unreasonable to handle many data transfer but necessary in this satuiation. How can we make it easy? Of course it is. Refelecting is a useful way to make data transfer easy for different CLR types value assignment....(read more)

Microsoft Spirit

anytao — Fri, 22 Aug 2008 02:59:00 GMT

Published 22 Aug 2008, by Anytao © 2008 Anytao.com , A fun world for making tech as art. I'm anytao, Visual C# MVP of Microsoft, and come from China. Contents If a country has its sprit, this nation and its people will overcome any difficult time, such...(read more)

Ways of Performance in .NET - Part1

anytao — Thu, 29 May 2008 17:08:00 GMT

book.anytao.com | Anytao in chinese

[Anytao]Ways of Performance in .NET - Part1

Published 30 May 2008, by Anytao
© 2008 Anytao.com, A fun world for making tech as art.

I'm anytao, Visual C# MVP of Microsoft, and come from China.

Contents

21 different ways about performance in .NET

How to implement the rules to improve the performance

Introduction

What is a good software product? Operation Process, User Experience, Security and Performance are all the necessary factors. A good performance system is one of the important score in the users’ survey. In the stock exchange center, there is tens of thousands of data exchange running in the stocker’s hand. Steadying running and effective performance is a must. At the same time, performance is also concerned in small software system, slow product always lose your face for customers.

Therefore, performance is important in system design. The influence in performance goes in different way, such as hardware, database, and software design. In this article, I’ll take attention to performance killer in .NET, list all general performance problem as items, including rules, habits, and syntax etc. According to all the performance item, you’ll get basic knowledge about how to improve your software from CLR and .NET Framework.

However, all the improvement items are on the basis of .NET foundation, not application area, such as Website Performance and Tuning, database improvement. OK, start our performance travel in our .NET world.

Performance Rules

Item1: Use Dispose taking the place of Finalize in unmanaged resources collection process.

About the collection process of unmanaged resources are so different from manage resources in CLR. Basically, there are two way to collect them: Dispose & Finalize. Finalize have no exact implement time when running collection and also have performance loss in finalizing queue mechanism. In another hand, Dispose model gives programmer more control rights. We can control the exact run time and have no loss in other factors.

So, dispose model is recommended.

Item2: Select proper garbage collector: Workstation GC and Server GC.

.NET CLR implement two garbage collectors, different collector have different algorithm, design for different CPU: Workstation GC is used to handle the single CPU System as default in CLR, Server GC is used to handle the muti-CPU Server System. Thence, you can’t server a Workstation GC in muti-CPU in result of performance loss and unfit a high throughout capacity in parallel model.

Select proper GC is a key element in performance.

Item3: Use WeakReference for large object.

WeakReference is one of effective way to improve large object performance. Generally speaking, WeakReference is an intermediate state for an object. It means a WeakReference object can be collect by GC when it become garbage, and also can be invoke by application when necessary. That’s impossible for common object. Usually, large object need more memory to create. WeakReference will give a chance to GC when lack of memory, and also use this object as normal before its collection. It makes a possible for time and space.

In .NET, WeakReference class is used for this process. Target attribute refers to the large object and generate a strong reference to a variable. Here is the usage about WeakReference.

public void WeakRef()

    MyClass mc = new MyClass();

    //Create WeakReference

    WeakReference wr = new WeakReference(mc);

    //Remove the strong reference

    mc = null;

    if (wr.IsAlive)

        //Weak Reference change into a strong reference

        //object can be used again

        mc = wr.Target as MyClass;

    else

        //Create a new object to mc

        mc = new MyClass();

Item4: Implement resource collection in using block.

The best practice of Dispose Model for resource collection is using block. It’s simplicity and elegance in syntax. And make sure to implement the dispose() method finally. The following is a non-using block expression for resource collectin:

public static void Main()

    FileDealer fd = null;

try

        fd = new FileDealer(new IntPtr(), new ManagedRes());

        fd.Read();

    finally

        if(fd != null)

            fd.Dispose();

Using block give a more effective way to carry out this request as follows:

public static void Main()

    using(FileDealer fd = new FileDealer(new IntPtr(), new ManagedRes()))

        fd.Read();

Of course, using is best.

Another rules will come soon...:-)

Tao | Inside Necessary .NET

www.anytao.com | Blog: http://anytao.cnblogs.com/

Tao Wang is Senior Developer working on a chinese company and responsible for project framework design, software develop and management. Tao is proficient with CLR Essential, good command of ASP.NET、ADO.NET、XML、SQL Server, and skilled in object-oriented, design pattern. Here is my new book about .NET inside

My new book Inside Necessary .NET

See book.anytao.com in detail.

This posting is provided "AS IS" with no warranties, and confers no rights.