Trek Innovations

Connecting Data & XML via ADO.NET

In this article you can see how to work with XML documents with the help of ADO.NET. In this there are two approaches to work with XML and ADO.

1. You can use ADO.NET to access XML documents.

2. You can use ADO.NET and XML to access XML. Apart from this, you can access RDBMS using ADO.NET and XML.NET.

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Windows Presentation Foundation Styles

Using WPF styles, we can handle look and feel of the controls. If we are setting styles, mechanically change look and feel of the every control of that type in that application.

XAML styling is very similar to HTML and CSS, and you can apply styling in related behavior. For example, we can define the appearance for all buttons (control) in an application; confine it to all buttons on a screen, to a group of buttons, or to apply a special style for just one button. In that case, XAML came into the picture to define the appearance of the controls. Styles are applied to controls. Styles can be applied to an individual Controls, a page or window or in an external file that can be shared by multiple pages, windows, or applications.

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Basic Concepts of Oops

Value Type Data Types

1. Memory allocates at compile time in stacks

2. De-allocation will be take care by stacks

Reference Type Data types

1. Memory allocates at runtime time in heap

2. De-allocation will be take care by Garbage Collector

Classes

1. It’s a reference type data type

2. It’s a user defined data type

3. Collection of properties (data) and behaviour (functions) is called a class

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Google (G1) vs iphone

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The Controls collection cannot be modified because the control contains code blocks (i.e. <% … %>).

Error Page

Basically this error occurs when a code block is placed in the MasterPage like this

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Concurrence Mode Instance specifies a service class supports single/multi-threaded modes of operation or not.

WCF follows an asynchronous messaging. It makes extensive use of asynchronous I/O, and as a result, each received message may be dispatched to a receiving object by different threads. Because of this feature allows WCF to use the CPU efficiently, and as a result, allows WCF applications to scale.

Below given example make clear the concurrence mode instance, how service class works with ConcurrencyMode instance property on the ServiceBehaviorAttribute type with respect to the client requests.

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Visual Studio 2008 & .Net Framework 3.5 Features 

The newley introduced .NET Framework 3.5 with Visual Studio 2008  provides developers to rapidly create applications that deliver high quality and rich user experiences. Visual Studio 2008 and .NET 3.5 contains a ton of new functionality and improvements which enables organizations of every size to rapidly create secure, manageable, and reliable applications that are optimized for Windows Vista™, SQL Server and the Web.

Visual Studio .NET based Windows application benefits from increased WPF designer performance.  Web development improvements include enhanced features like JavaScript IntelliSense, JavaScript Debugging,supports SQL Server 2008, ADO.NET Entity Framework, ADO.NET Data Services. It provides more powerful new graphics for the development and provides very rich data scaffolding. 

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Instance Management using WCF: 

Below given example make clear the instancing behaviour setting, which controls how instances of a service class are created in response to client requests.

Types of instancing modes:

PerCall:  A new instance is created for each client request.

PerSession:  A new instance is created for each new client session, and it will be available throughout the session

Single: Only one instance handles for all client requests throughout the application 

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