namespaces & assemblies

namespaces & assemblies

The import statement enables access to a namespace in an external library or within the current script. The syntax is very simple: import namespaceName; where namespaceName is the name of the required namespace. There is always the question as to where the computer should search for the given namespace. A namespace is a collection of classes that typically offer related features or functions. An assembly, on the other hand, is a physical file, deployed during installation of the .NET framework, or other applications. File extensions .dll or .exe are a clear indication of assemblies. Usually, your namespaces will be implemented in .dll files. What's the relationship between the .dll file name and the namespace name? Generally speaking, none. A single namespace can be distributed among several .dll files. Also, a single .dll file can include multiple namespaces. In practice, though, the name of the .dll is usually the name of the namespace, and the jsc.exe compiler does support this practice with the /autoref compilation switch. Mitesh Mehta

Data Structures in C#

Data Structures in C#

This six-part series that focuses on important data structures and their use in application development. Also examines both built-in data structures present in the .NET Framework, as well as essential data structures we'll have to build ourselves. Part 1: An Introduction to Data Structures Focuses on defining what data structures are, how the efficiency of data structures is analyzed, and why this analysis is important. Part 2: The Queue, Stack, and Hashtable Examines three of the most commonly studied data structures: the Queue, the Stack, and the Hashtable. Part 3: Binary Tress and BSTs Looks at a common data structure that is not included in the .NET Framework Base Class Library: binary trees. Part 4: Building a Better Binary Search Tree Examination of AVL trees and red-black trees, which are two different self-balancing, binary search tree data structures, skip list data structure, an ingenious data structure that turns a linked list into a data structure that offers the same running time as the more complex self-balancing tree data structures Part 5: From Trees to Graphs All about graphs, one of the most versatile data structures. Part 6: Efficiently Representing Sets Data structures for implementing general and disjoint sets. A set is an unordered collection of unique items that can be enumerated and compared to other sets in a variety of ways. Regards, Mitesh Mehta Microsoft Certified Professional miteshvmehta@gmail.com

Some Questions On .Net

Some Questions On .Net

7.How to get updated data if datasource changes after filling dataset from datasource? First of all, a dataset should be used only when the data is not expected to change very often. To get data that has been changed in the datasource itself, means simply re-querying the datasource and re-filling the dataset.

Shared & Protected methods

Shared methods

You can have as many shared (static, in C#) methods as you want. But the constraint here is that these methods will not be available from the class's instance objects. Also, with shared methods the benefits of object "construction" are not available, since shared methods can only be called on the class directly rather than on the instances. Also, shared methods do not have access to the class's non-shared or non-static member variables.

Protected members are different from friend members...Consider any class "A". Friend methods are those that belong to a different class but have access to A's members. Protected members are those members that can be accessed by a derived class's methods - this is different from private members which can only be accessed by the methods of A. Consider the class "A" mentioned above: Member type Access level Private Can be accessed only by methods of A Protected Can be accessed by methods of A as well as methods of any class derived from A For friend members, first of all, only "Methods" or "Functions" can act as "Friends" of a class and a method belonging class B must be declared as a friend method in class A so that B.FriendMethod() can access member variables of class A.

Presentations from TechED (US)

Presentations from TechED (US)

View or download the .NET Framework-related presentations from TechEd 2004 (US) using below link http://msdn.microsoft.com/netframework/support/training/teched2004/ The following some of presentations that I liked, 1) Exploring What's New in the CLR 2.0 2) Visual C# Best Practices 3) Visual C# 2005: Language Enhancements 4) Visual Studio: Deploying NET Applications with Ease 5) .NET and J2EE Strategies for Interoperability There are more inside.. worth a reference, download ASAP!! Regards, Mitesh Mehta Microsoft Certified Professional miteshvmehta@gmail.com

Beta 1 .NET FrameWork 2.0 available for Public Download

Beta 1 .NET FrameWork 2.0 available for Public Download

The Beta 1 .NET Framework 2.0 SDK and redistributables are available for download. You can find them here: http://lab.msdn.microsoft.com/vs2005/downloads/default.aspx Regards, Mitesh V. Mehta Microsoft Certified Professional miteshvmehta@gmail.com

New ADO.NET 2.0

New ADO.NET 2.0

With the new release of Visual Studio .NET 2005 Beta 1 and the .NET Framework 2.0 Beta Microsoft has included a lot of nice enhancements to ADO.NET 2.0. By either using the DAAB or writing it your self, you could get generic provider factories. Microsoft has now included this in ADO.NET 2.0 along with a lot of other nice enhancements. For those using SQL Server and wanting to provide a list of servers to your users, we would have to PInvoke SQL DMO. Now there is a new base class called DbEnumerator. The SqlClient support for this class will return a list of SQL servers. There is a ton of features that you can read more about at the following link... http://msdn.microsoft.com/data/default.aspx?pull=/library/en-us/dnvs05/html/ado2featurematrix.asp Regards, Mitesh Mehta Microsoft Certified Professional

Refactoring in Whidbey

Refactoring in Whidbey

Code refactoring means restructuring your code so that the original intention of the code is preserved. Example of code refactoring is extracting a block of code and placing it into a function for more efficient code reuse. In Visual Studio .NET 2005 (codenamed Whidbey), a code refactoring engine is built in. Read more here.. http://www.ondotnet.com/pub/a/dotnet/2004/06/28/whidbey_refactoring.html MSDN has also posted a good article on Refactoring for C# Code Using Visual Studio 2005 that introduces the concept of refactoring and covers many of the techniques that are supported in the new IDE. http://msdn.microsoft.com/vcsharp/defaultaspx?pull=/library/en-us/dnvs05/html/VS05_refac.asp Regards, Mitesh Mehta Microsoft Certified Professional miteshvmehta@gmail.com

Boxing and Unboxing

Boxing and Unboxing

It's better to say that boxing (and unboxing) is a specialised form of casting or type-casting. In .NET, every class derives from the "object" class. Since the "object" class is the base class of all objects, any object can be cast to the type "object" and then reconverted to the specific type. The conversion from specific type to "object" is called boxing and the reverse is called unboxing. Unlike traditional casting, any object or datatype can be boxed and unboxed. In traditional casting, there are certain limitations. For example, string type cannot be cast into, say, int type. But any object or variable can be cast to "object". So in simple terms, boxing is casting from specialised type to type "object" and unboxing is the reverse. Regards, Mitesh Mehta Microsoft Certified Professional miteshvmehta@gmail.com

Add/Remove Programs feature in Control Panel

To utilize the Add/Remove Programs feature in Control Panel, you must add a key to the Registry under HKEY_LOCAL_MACHINES\Software\Microsoft\Windows\CurrentVersion\Uninstall\Uniq ueName where UniqueName will be any Unique name that you can use for your program identification Note: Goto Start->Run - Type "Regedit" and browse to the location to see for yourself... Mitesh Mehta M.C.P. (.Net)

Some Questions On .Net

Some Questions On .Net

1.How many classes can a single dll can have? A single DLL (.net assembly) can have many classes / a single class. 2.how to create permenant cookie? In Classic Asp, we used to set the "Expires" property to "Never" to the cookie object, I'm sure microsoft has kept it that way!. 3.what is difference between response.write() and response.output.write()? Response.Output.Write() -- writes the output in the format specified, where as Response.Write() does not. 4.how to kill a session explicitly? you mean programatically?, Session.Abandon() 5.how to make a wrap up call to web service? What do you mean by wrap up call, webservice exposes some methods over the web- that's why it is called web method, once added web-reference to a webservice to a dotnet web/windows application, a proxy is created for you(client) and you can make webmethod call , as if the object is available locally. If we're talking about non-.net client(like Java), then soap / xml is used to post the request to the .Net Web method(s). in order to execute them and get values . 6.what os bubbled event? Pass!. 7.How to get updated data if datasource changes after filling dataset from datasource? http://support.microsoft.com/default.aspx?scid=kb;EN-US;313485 take care,

New features in .NET Framework 2.0

New features in .NET Framework 2.0

The .NET Framework 2.0 introduces enhancements across the .NET Framework. Windows client application development will be simplified through new controls and designer features, while the introduction of "ClickOnce" technology will dramatically ease Windows client application deployment. ASP.NET 2.0 introduces a collection of new features that refine Web application development and radically reduce coding effort. Other enhancements include more productive ADO.NET data access, support for the latest Web services standards, and expanded functionality for device-based development. Common Language Runtime 2.0 Generics: Generics are classes and methods that work uniformly on values of different types and can greatly improve developer productivity by boosting code reuse. Edit and Continue: The feature that made Visual Basic “RAD” is now in the core CLR, enabling developers to halt program execution, change a line of code, and continue running it without a full recompilation. Performance and Load Time: The CLR now loads more quickly and takes up less memory footprint. Windows Forms 2.0 Application Deployment: Windows Forms 2.0 introduces “ClickOnce,” which makes it simple for developers to package and deploy applications and simplifies the inclusion of pre-requisites in the installation package. ClickOnce further provides a simple way for administrators and users to deploy and update applications. Visually Stunning Presentation: Windows Forms 2.0 brings together the capability to build applications that look like Microsoft Office and increases flexibility and control over how you can position controls on the forms. It includes a new grid control, a Sound Player control, a Web Browser control and an Active Document Host control. Beyond that, in order to make your application look more like Microsoft Windows or Office, we have made Windows Forms controls render with visual styles by default, and we have created a new menu, toolbar, and status bar family of controls called ToolStrips. ASP.NET 2.0 Productivity and Customizability: ASP.NET 2.0 includes support for membership (user name/password credential storage) and role management services. The personalization service enables quick storage/retrieval of user settings and preferences, facilitating rich customization with minimal code. Master Pages now enable flexible page UI inheritance across sites. Augmenting all these infrastructure features are more than 45 new server controls in ASP.NET 2.0 that enable powerful declarative support for data access, login security, wizard navigation, image generation, menus, treeviews, portals, and more. UI Adaptability: All standard ASP.NET 2.0 controls are now built with a rich UI adapter extensibility architecture that enables customization of output for different browsers and devices. All built-in ASP.NET controls with the <asp:> prefix are now mobile enabled in Whidbey, which allows developers to automatically target more than 300+ unique devices that support a variety of different markup standards (WAP/WML, XHTML Mobile, cHTML, etc). Administration and Management: ASP.NET 2.0 includes configuration management APIs, enabling developers to create, read, and update Web.config and machine.config configuration files and an admin tool that plugs into the existing IIS Administration MMC, enabling an administrator to graphically read or change any setting within our XML configuration files. It also includes a new application deployment utility that will enable both developers and administrators to precompile a dynamic ASP.NET application prior to deployment protecting your source code. Finally, ASP.NET 2.0 provides health-monitoring and tracing support to enable administrators to be automatically notified when an application on a server starts to experience problems. Speed and Performance: ASP.NET 2.0 is 64-bit enabled so it can take advantage of the full memory address space of new 64-bit processors and servers. ASP.NET 2.0 also includes automatic database server cache invalidation enabling developers to cache database-driven pages and partial page content and have ASP.NET automatically invalidate these cache entries and refresh the content whenever the back-end database changes. Regards, Varad Microsoft Solutions Group

.NET Framework 1.0 SP3 and 1.1 SP1 Tech Preview Available for Public Download

.NET Framework 1.0 SP3 and 1.1 SP1 Tech Preview Available for Public Download

.NET Framework 1.0 SP3 and 1.1 SP1 Tech Preview Available for Public Download Microsoft had made technology preview versions of the .NET Framework 1.0 SP3 and .NET Framework 1.1 SP1 available for developers to download so they can test their .NET Framework-based applications with these service packs applied. Though these are unsupported technology previews, we would like to ask your help in ensuring the quality of the service packs by downloading them, testing your existing applications on them, and giving us feedback. These two service packs address issues with the .NET Framework 1.0 and 1.1 including: <![if !supportLists]>· <![endif]>All customer issues addressed with hotfixes <![if !supportLists]>· <![endif]>Improved importing of WSDL <![if !supportLists]>· <![endif]>Data Execution prevention<o:p></o:p> <![if !supportLists]>· <![endif]>Buffer overrun protection Customers can download the technology previews from <st1:place w:st="on"><st1:PlaceName w:st="on">Microsoft.com</st1:PlaceName> <st1:PlaceName w:st="on">Download</st1:PlaceName> <st1:PlaceType w:st="on">Center</st1:PlaceType></st1:place> at: <o:p></o:p> .NET Framework 1.0 Service Pack 3 Tech Preview: http://www.microsoft.com/downloads/details.aspx?FamilyId=CF52CA95-F2CC-459F-87EE-C17D16E22F08&displaylang=en .NET Framework 1.1 Service Pack 1 Tech Preview: http://www.microsoft.com/downloads/details.aspx?FamilyId=12721880-CB9F-4481-9610-987DE96532E7&displaylang=en .NET Framework 1.1 Service Pack 1 Tech Preview for Windows Server 2003: http://www.microsoft.com/downloads/details.aspx?FamilyId=DA1C20AD-35AE-4CEA-8451-730FCD603383&displaylang=en If you have feedback, please send it to us at http://communities.microsoft.com/newsgroups/default.asp?icp=techpreview&slcid=us; Thanks very much for your time,

MS Press - Ebook of 70-310/70-320

MS Press - Ebook of 70-310/70-320

http://www.intersoftlb.com/ebook.aspx - DUMPS ARE AVAILABLE

HelpProvider Class

HelpProvider Class HelpProvider Class in Windows form has a method SetHelpString()... This method will associate a string that you provide with the control specified... This help will be shown when the user presses F1 while the control has focus... Example Private objhelpProvider As System.Windows.Forms.HelpProvider Me.objhelpProvider.SetHelpString(Me.txtZipCode, "Just enter the first 5 digits for Zip code, this applies to US only...") Me.objhelpProvider.SetShowHelp(Me.txtZipCode, True) Mitesh Mehta

Application Domains Basics

Application Domains Basics Inter process communication is always painful... The memory pointers in one process many a times do not make a lot of sense in the other process... To tackle this problem and many others; Application Domains are introduced in .Net... There can be more than one Application Domain running under the same process... Application Domain provides nearly equivalent level of isolation as would a separate process and at the same time saves the hits of cross-process communications... By having high isolation you can prevent failure of one application to affect other application... Note: There is lot more to application domains and its a very interesting topic, do give it some time of yours it will be worthwhile.. Mitesh Mehta