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Programming tutorials

Showing tutorials 460 to 480 out of 539 Programming tutorials.

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E mail is an extremely popular communication mechanism  The  Net framework has added the System Net Mail namespace which provides classes that enable you to easily create and transmit email messages  Messages can include plain text and attachments  In this tutorial we will talk about creating emails

Creating Emails in C#

E-mail is an extremely popular communication mechanism. The .Net framework has added the System.Net.Mail namespace which provides classes that enable you to easily create and transmit email messages. Messages can include plain text and attachments. In this tutorial we will talk about creating emails.

Not yet rated with 682 hits  Added on: Sep 12, 2008

Unauthorized access of sensitive data must be prohibited in a business application  Unauthorized users must not be able to view other people s information  In a windows program  sometimes it is necessary to provide different information in guests and users  A guest should not be able to see important data of the program s flow  The authentication methods require the System Security Principal namespace

Authenticating Users in C#

Unauthorized access of sensitive data must be prohibited in a business application. Unauthorized users must not be able to view other people’s information. In a windows program, sometimes it is necessary to provide different information in guests and users. A guest should not be able to see important data of the program’s flow. The authentication methods require the System.Security.Principal namespace.

Not yet rated with 605 hits  Added on: Sep 12, 2008

C  provides several mechanisms for flow control in a program   The loops in C  allow you to execute a block of code repeatedly  until a certain condition is met  This condition can be the number of repetition  a variable taking a specified value or something completely different  The while loop is a pre test loop and is used to execute a block of code for a number of times not known before the loop begins  The  do  while loop is a post test loop and is used for the same purposes as the  while loop

While Loops in C#

C# provides several mechanisms for flow control in a program. The loops in C# allow you to execute a block of code repeatedly, until a certain condition is met. This condition can be the number of repetition, a variable taking a specified value or something completely different. The while loop is a pre-test loop and is used to execute a block of code for a number of times not known before the loop begins. The do..while loop is a post-test loop and is used for the same purposes as the while loop.

Not yet rated with 790 hits  Added on: Sep 12, 2008

The switch statement offers the programmer the capability to choose a specific block of code from a set of mutually exclusive ones  It is similar but not identical to the if statement   The block of code that will be chosen is not known before the execution of the program  This can be for example due to different windows platform or specific localization settings of each country

The SWITCH Statement in C#

The switch statement offers the programmer the capability to choose a specific block of code from a set of mutually exclusive ones. It is similar but not identical to the if statement. The block of code that will be chosen is not known before the execution of the program. This can be for example due to different windows platform or specific localization settings of each country.

Not yet rated with 631 hits  Added on: Sep 12, 2008

Classes are a major element of every object oriented language  If you are a promising new programmer  chances are you will create and use classes in each and every one of your programs  Classes provide templates that describe various objects  from a customer of a hotel to a new car model  In this tutorial we will talk about some basic concepts regarding their declaration methods and usage

Creating Classes in C#

Classes are a major element of every object-oriented language. If you are a promising new programmer, chances are you will create and use classes in each and every one of your programs. Classes provide templates that describe various objects, from a customer of a hotel to a new car model. In this tutorial we will talk about some basic concepts regarding their declaration methods and usage.

Not yet rated with 530 hits  Added on: Sep 12, 2008

To read some text from the command line you use the Console Read or Console ReadLine method implemented in the  net framework  The difference between them is that the Console Read method reads the next character from the command line  whereas Console ReadLine reads the next line of characters instead of just a simple character  The Console Read method returns an integer and should be cast to a char during the input  There is also a special function called Console ReadKey  Boolean display  which obtains the key that is pressed on the keyboard and if the display parameter is false it depicts it

Console INPUT/OUTPUT

To read some text from the command line you use the Console.Read or Console.ReadLine method implemented in the .net framework. The difference between them is that the Console.Read method reads the next character from the command line, whereas Console.ReadLine reads the next line of characters instead of just a simple character. The Console.Read method returns an integer and should be cast to a char during the input. There is also a special function called Console.ReadKey( Boolean display) which obtains the key that is pressed on the keyboard and if the display parameter is false it depicts it.

Not yet rated with 1631 hits  Added on: Sep 12, 2008

Reference types provide excellent flexibility and performance of large structures  This is the reason that classes are reference types and structs are data value types  As you will probably know  reference types do not store the actual value of the object but a pointer to a memory location  This pointer is stored on the stack  whereas the object itself is located in the managed heap

Reference Data Types

Reference types provide excellent flexibility and performance of large structures. This is the reason that classes are reference types and structs are data value types. As you will probably know, reference types do not store the actual value of the object but a pointer to a memory location. This pointer is stored on the stack whereas the object itself is located in the managed heap.

Not yet rated with 605 hits  Added on: Sep 12, 2008

Structs  similar to classes  are used to define various objects in your code  They are stored on the stack  rather than in the managed heap  This means that they are value type objects and thus  when you pass a struct as a parameter in a function  a copy of the object is actually passed to that function  This can affect the performance of your code if you use structs for large objects  However  since the  Net does not bring in the managed heap  structs are more suitable for small objects of limited functionality and with no inheritance capabilities

Working with Structs in C#

Structs, similar to classes, are used to define various objects in your code. They are stored on the stack, rather than in the managed heap. This means that they are value-type objects and thus, when you pass a struct as a parameter in a function, a copy of the object is actually passed to that function. This can affect the performance of your code if you use structs for large objects. However, since the .Net does not bring in the managed heap, structs are more suitable for small objects of limited functionality and with no inheritance capabilities.

Not yet rated with 537 hits  Added on: Sep 12, 2008

C  distinguishes between two  2  different data types categories  value and reference types  Value data types directly store their value while reference data types store a reference to their value  Value types are stored on the stack whereas reference types are stored on the managed heap

Value Data Types in C#

C# distinguishes between two (2) different data types categories: value and reference types. Value data types directly store their value while reference data types store a reference to their value. Value types are stored on the stack whereas reference types are stored on the managed heap.

Not yet rated with 545 hits  Added on: Sep 12, 2008

The string class is designed specifically for storing and manipulating strings  Some operations of this class include conversion to lower or uppercase  removal of leading and trailing whitespace  replacing characters  comparing two strings and more  Also  a ToString   method is inherited to every object in C   making available a string conversion of any object  Of course  this method can be overridden in your classes so that you can define the process in which this conversion takes place

Working with Strings in C#

The string class is designed specifically for storing and manipulating strings. Some operations of this class include conversion to lower or uppercase, removal of leading and trailing whitespace, replacing characters, comparing two strings and more. Also, a ToString() method is inherited to every object in C#, making available a string conversion of any object. Of course, this method can be overridden in your classes so that you can define the process in which this conversion takes place.

Not yet rated with 605 hits  Added on: Sep 12, 2008

C  provides several mechanisms for flow control in a program   The loops in C  allow you to execute a block of code repeatedly  until a certain condition is met  This condition can be the number of repetition  a variable taking a specified value or something completely different  The for loop allows you to repeatedly execute a block of code for a specified number of times

FOR Loops in C#

C# provides several mechanisms for flow control in a program. The loops in C# allow you to execute a block of code repeatedly, until a certain condition is met. This condition can be the number of repetition, a variable taking a specified value or something completely different. The for loop allows you to repeatedly execute a block of code for a specified number of times.

Not yet rated with 534 hits  Added on: Sep 12, 2008

Functions are a must for modern object oriented programming and for visual programs as well  When you click a button on your mouse an event is generated  This event fires a function that is linked to that particular event  Therefore  you need to define several functions that correspond to various actions your code should perform  They are also useful when you need to call a block of code many times in different parts of your program

Functions in C#

Functions are a must for modern object oriented programming and for visual programs as well. When you click a button on your mouse an event is generated. This event fires a function that is linked to that particular event. Therefore, you need to define several functions that correspond to various actions your code should perform. They are also useful when you need to call a block of code many times in different parts of your program.

Not yet rated with 529 hits  Added on: Sep 12, 2008

A significant advantage of C  when compared to C   is the memory management capabilities of the C   The programmer need not worry about memory management  the garbage collector is assigned this operation on the programmer s behalf  You will probably know that value data types are stored on the stack while reference data types are stored on the managed heap  The stack stores data value types that are not members of objects  Also  in C  it is always the case that if variable a goes into scope before variable b  then b will go out of scope first  For example  if you declare some variables in a method  these variables will go out of scope when the method ends   However  it maybe sometimes that you need to keep these variables long after the method function ended  This happens for all data declared with the new operator  the reference types  All reference types are stored in the managed heap  which is under the control of garbage collector

Garbage Collection in C#

A significant advantage of C# when compared to C++ is the memory management capabilities of the C#. The programmer need not worry about memory management; the garbage collector is assigned this operation on the programmer’s behalf. You will probably know that value data types are stored on the stack while reference data types are stored on the managed heap. The stack stores data value types that are not members of objects. Also, in C# it is always the case that if variable a goes into scope before variable b, then b will go out of scope first. For example, if you declare some variables in a method, these variables will go out of scope when the method ends. However, it maybe sometimes that you need to keep these variables long after the method/function ended. This happens for all data declared with the new operator, the reference types. All reference types are stored in the managed heap, which is under the control of garbage collector.

Not yet rated with 606 hits  Added on: Sep 12, 2008

The if statement is a so called conditional statement  It allows you to branch your code depending on whether certain conditions are met or not  C  has two such conditional statements  the if statement and the switch statement  In this tutorial we will talk about the if statement  a frequent element of all programs

The IF Statement in C#

The if statement is a so-called conditional statement. It allows you to branch your code depending on whether certain conditions are met or not. C# has two such conditional statements, the if statement and the switch statement. In this tutorial we will talk about the if statement, a frequent element of all programs.

Not yet rated with 543 hits  Added on: Sep 12, 2008

In this tutorial introduce you to the concept of Classes and Objects in PHP  To put it simply  an Object in the context of programming languages is a data structure which can contain any number of variables and functions all held together under a Class name  This Class can then be created in the normal scope of the code and stored inside a new variable  and multiple copies of this same class can be created  This allows for an even greater level of code encapsulation  allowing more complexity to be accessed from simple commands

Classes and Object-Oriented Programming in PHP

In this tutorial introduce you to the concept of Classes and Objects in PHP. To put it simply, an Object in the context of programming languages is a data structure which can contain any number of variables and functions all held together under a Class name. This Class can then be created in the normal scope of the code and stored inside a new variable, and multiple copies of this same class can be created. This allows for an even greater level of code encapsulation, allowing more complexity to be accessed from simple commands.

Rated:*** with 826 hits  Added on: Sep 06, 2008

When developing more complex PHP sites  especially forums  discussion boards and blogs where date and time functions are important  you ll regularly encounter situations where you need to display and manipulate values based around the current date and time  PHP includes a range of functions which can help you to easily format and adjust your date and time displays to suit your needs  In this tutorial  we ll look at some easy ways to display calendar information for your visitors

Working with dates and times in PHP

When developing more complex PHP sites, especially forums, discussion boards and blogs where date and time functions are important, you’ll regularly encounter situations where you need to display and manipulate values based around the current date and time. PHP includes a range of functions which can help you to easily format and adjust your date and time displays to suit your needs. In this tutorial, we’ll look at some easy ways to display calendar information for your visitors.

Rated:**** with 789 hits  Added on: Sep 06, 2008

This tutorial shows how to Avoid the  Permission denied in  IIS while installing a php script or running your own script  This tutorial has step  by step instruction with screen shots of how to change read  write  execute permission on scripts  This will help you to avoid write permission errors for script installation  thumbnail script  image manipulation script   file handling script etc

Setting write permission on files in IIS/Windows

This tutorial shows how to Avoid the "Permission denied in" IIS while installing a php script or running your own script. This tutorial has step by step instruction with screen shots of how to change read, write, execute permission on scripts. This will help you to avoid write permission errors for script installation, thumbnail script, image manipulation script , file handling script etc.

Rated:*** with 903 hits  Added on: Aug 29, 2008

Tutorial on how to use PHP and MySQLi   MySQLi stands for MySQL Improved and is a faster  more reliable method of connection

PHP MySQL Improved

Tutorial on how to use PHP and MySQLi. MySQLi stands for MySQL Improved and is a faster, more reliable method of connection.

Rated:*** with 899 hits  Added on: Jun 30, 2008

An example of how to create a fluent array and string library in PHP

Fluent Arrays and Strings in PHP

An example of how to create a fluent array and string library in PHP.

Rated:*** with 912 hits  Added on: Jun 23, 2008

How to use array multisort to sort tables by column

Sorting 2D-arrays in PHP

How to use array_multisort to sort tables by column.

Rated:*** with 942 hits  Added on: Jan 06, 2008

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