uCertify Articles » 70-305 http://www.ucertify.com/article Just another WordPress weblog Wed, 04 Nov 2009 00:00:00 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 What is Trace.axd? http://www.ucertify.com/article/what-is-traceaxd.html http://www.ucertify.com/article/what-is-traceaxd.html#comments Tue, 27 Oct 2009 00:00:00 +0000 uCertify 2600184

Trace.axd is an Http Handler that can be used to view the trace details for an application. This file resides in the application’s root directory. A request to this file through a browser displays the trace log of the last n requests in time-order, where n is an integer determined by the value set by requestLimit=”[n]” in the application’s configuration file.

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The FROM clause of the SQL SELECT statement is used to specify the table names that will be joined together to extract the data values. For example:

SELECT <attributes>
FROM <tables>
WHERE <condition>

Share/Bookmark]]> http://www.ucertify.com/article/what-is-the-function-of-the-from-clause-2.html/feed 0 What is the ExecuteNonQuery method? http://www.ucertify.com/article/what-is-the-executenonquery-method-2.html http://www.ucertify.com/article/what-is-the-executenonquery-method-2.html#comments Mon, 21 Sep 2009 00:00:00 +0000 uCertify 2600152

The ExecuteNonQuery method of the SqlCommand class is used to execute commands that change a database. These commands include the Transact-SQL INSERT, UPDATE, DELETE, and SET statements. The method acts directly on a database connection and does not require a data set. It returns an integer that indicates the number of rows affected by the execution of a command. This method can also be used to perform catalog operations, such as querying the structure of a database or creating database objects.

Share/Bookmark]]> http://www.ucertify.com/article/what-is-the-executenonquery-method-2.html/feed 0 What is the GetChildRows method? http://www.ucertify.com/article/what-is-the-getchildrows-method-2.html http://www.ucertify.com/article/what-is-the-getchildrows-method-2.html#comments Mon, 21 Sep 2009 00:00:00 +0000 uCertify 2600158

The GetChildRows method of the DataRow class is used to get the child rows of a DataRow object. The DataRow class defines four overloaded versions of the method. Their signatures are as follows:

Signature Description
Overloads Public Function GetChildRows(DataRelation) It is used to get the child rows of a DataRow by using the specified DataRelation, which is passed as a parameter to the method.
Overloads Public Function GetChildRows(String) It is used to get the child rows of a DataRow by using the specified RelationName of a DataRelation.
Overloads Public Function GetChildRows(DataRelation, DataRowVersion) It is used to get the child rows of a DataRow by using the specified DataRelation and DataRowVersion.
Overloads Public Function GetChildRows(String, DataRowVersion) It is used to get the child rows of a DataRow by using the specified RelationName of a DataRelation and DataRowVersion.

All the versions of the method return an array of DataRow objects.

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The HtmlTextWriter class writes a sequential series of HTML-specific characters and text on a Web Forms page. This class provides various formatting capabilities. These formatting capabilities are used by ASP.NET server controls to render HTML content to clients.

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The Web Setup project is a Setup and Deployment project, which is used to create installation packages for the deployment of Web-based applications such as XML Web services, Web applications etc., to a Web server. It creates an (.msi) installer package. Using the Web Setup project for deployment handles the registration and configuration issues automatically.

Note: The Web Setup project installs files into the virtual directory on a Web server.

Share/Bookmark]]> http://www.ucertify.com/article/what-is-web-setup-project-2.html/feed 0 What is a destructor? http://www.ucertify.com/article/what-is-a-destructor-2.html http://www.ucertify.com/article/what-is-a-destructor-2.html#comments Tue, 01 Sep 2009 00:00:00 +0000 uCertify 1501188

A destructor is a special type of method. It is used to destroy instances of a class when they are no longer used by an application. A destructor has the same name as the class in which it resides, preceded by a tilde (~) symbol. The garbage collector determines when the destructor of a class is to be called, and automatically calls it. The destructor implicitly calls the Object.Finalize method on the object’s base class. Following are some restrictions imposed on the usage of destructors:

  • Destructors can be used only with classes.
  • Destructors cannot be used with structs.
  • A class can contain only one destructor.
  • Destructors cannot be inherited.
  • Destructors cannot be overloaded.
  • Destructors cannot be called explicitly.
  • Destructors cannot take modifiers or parameters.
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SqlDataAdapter is a class used to represent a set of data commands and a database connection that are used to fill a DataSet and update a SQL Server database. It is used to retrieve and save data between a DataSet and a data source. The SqlDataAdapter class is used in conjunction with the SqlConnection and SqlCommand classes to enhance the performance while connecting to a SQL Server database.

Share/Bookmark]]> http://www.ucertify.com/article/what-is-sqldataadapter-2.html/feed 0 What is Sn.exe? http://www.ucertify.com/article/what-is-snexe-2.html http://www.ucertify.com/article/what-is-snexe-2.html#comments Mon, 31 Aug 2009 00:00:00 +0000 uCertify 1501041

Strong Name (Sn.exe) is a tool used to sign assemblies with strong names. It also provides signature generation, signature verification, and key management. Following is the syntax for using Sn.exe:

sn [options [parameters]]

where, the term options specifies the options to be used, and parameters specifies the parameters used with options. Following are the options that are commonly used with Sn.exe:

Option Description
-k It is used to generate a new key pair and write it to a specified file.
-i It is used to install a key pair from a specified key container that resides in a strong name Cryptographic Service Provider (CSP).
-p It is used to extract a public key from a key pair file and store it in another key pair file.
-v It is used to verify the strong name in an assembly.
-d It is used to delete a specified key container from the strong name CSP.
-D It is used to verify that two assemblies differ only by signature.
-Vx It is used to remove all verification-skipping entries.
Share/Bookmark]]> http://www.ucertify.com/article/what-is-snexe-2.html/feed 0 What is Microsoft .NET Framework? http://www.ucertify.com/article/what-is-microsoft-net-framework-2.html http://www.ucertify.com/article/what-is-microsoft-net-framework-2.html#comments Mon, 31 Aug 2009 00:00:00 +0000 uCertify 1501102

Microsoft .NET Framework is a computing platform for building applications using .NET. It simplifies application development in a distributed environment. The .NET Framework provides an object-oriented programming model that enables developers to build all types of applications, such as Windows-based applications, Web services etc.

The .NET Framework provides four interoperable common language specification (CLS) compliant languages:

  1. Microsoft Visual Basic .NET
  2. Microsoft Visual C# .NET
  3. Microsoft Visual J# .NET
  4. Microsoft Visual C++ .NET

The compilers of these languages generate an intermediate code that is known as Microsoft Intermediate Language (MSIL). MSIL makes an application written in any CLS-compliant language interoperable.

The .NET Framework supports cross-language inheritance and allows language interoperability. Developers can create classes using any language that is supported by the .NET Framework and reuse them in classes written in other .NET supported languages.

The following image displays the components of the .NET Framework:

The .NET Framework class library and common language runtime are two main components of the .NET Framework.

The common language runtime provides the runtime environment for applications. It also provides various runtime services, such as cross-language integration, code access security, object lifetime management, and debugging and profiling support.

The .NET Framework class library is a CLS-compliant library consisting of classes, interfaces, and value types that are included in the Microsoft .NET Framework SDK.

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