C# Corner

Resources  
  • Meal Scheduler in C#May 04, 2000. In this application once you enter your meal timings. A message box will appear on the screen while you are working and remember you about your meal with light sound.
  • Graphics Animation SampleMay 16, 2000. After finishing a text program (lottery) its time for some fun. Everytime a have to work with a new language.I write a small program to bounce some balls in a box.
  • CSDownloadURL : Download Contents of a Web PageDec 03, 2000. CSDownloadURL is a class which has two functions - SetURL and DownloadURL. The set URL sets the current URL and GetDownload downloads the URL contents and returns its contents in a string.
  • Creating an Empty Project using VS.NETDec 04, 2000. This tutorial guides you towards your first C# Empty project step by step. After that I'll show you how to add a class to the project and few members to the class and call this class members from the main method.
  • Tutorial: Creating C# Class Library (DLL) Using Visual Studio .NETDec 09, 2000. This step-by-step tutorial shows you how to create a class library (DLL) in Visual Studio .NET.
  • SmtpMail and Mail Message : Send Mails in .NET Jan 12, 2001. You can use SmtpMail and MailMessage to send mails in .NET.
  • Using ListViews in C#Jan 18, 2001. As a Visual C++ user for 10 years I can say that Microsoft deserves praise for their new ListView class. The MFC ListView class was, well, unpleasant to use. C# makes life a bit easier with a richer property and method set for ListViews. Also, you can now, set the ListView to select an entire row in report mode, something that in Visual C++ you had to write a whole custom ListView control to do. Note also the nice grid lines.
  • Implementing Delegates in C#Feb 04, 2001. The Zip file contains two projects. One is VB.Net and the other is C#. Each project is an example of the same use of a delegate. A base class is derived and the delegate calls a method on several classes derived from the base class.
  • Horoscope Web ServiceFeb 08, 2001. An article talks about web services and how to develop them using .NET.
  • Using the ref ParameterMar 06, 2001. The ref keyword on a method parameter causes a method to refer to the same variable that was passed as an input parameter for the same method. If you do any changes to the variable, they will be reflected in the variable.
  • Using the out ParameterMar 07, 2001. Did you ever need your method return more than one value? The out keyword can be used to do the same.
  • Effective C#: Working with StringsMar 12, 2001. Using string might degrade the performance of your application. This article explains about what precautions you should take when you are going to use strings in your application.
  • Using Transforms with GDI+ in C#Mar 15, 2001. Transforms are matrices that allow you to rotate and translate your graphics shapes. In this example we are going to rotate a very powerful element in C# called the GraphicsPath.
  • Write Relational Data to an XML FileMar 15, 2001. This article shows you how you can write data from a database to an XML file using DataSet.
  • ADO.NET DataSet ProgrammingMar 20, 2001. A sample project shows you how to add, edit, delete, navigate, save records in a database using DataSet.
  • Using Delegates to Choose Right FunctionApr 01, 2001. The need to call different class method based on some string passed to class is an old problem.
  • Web Request ClassApr 04, 2001. This is a simple application that the gets the source of a webpage via the WebRequest Object.
  • Writing Secure Code using C#Apr 06, 2001. Code access security is a mechanism that grants/denies access to resources within a method call. For example, code written by a person may be allowed to write to the disk while code from another one may be forbidden from accessing the disk. This control can be enforced even if the code written by both of them is used within a single application
  • Invoking Web Method from one Web Service to AnotherApr 10, 2001. In this article I will show you how to connect a web service from another.
  • Understanding How Assert Effects SecurityApr 25, 2001. Assert is a security action that is evaluated at run time. Code Access Permission classes and Permission Sets support a method called Assert. Using the Assert method to control access to resources or actions will allow your code to perform actions that it normally has permission to perform and will allow other callers up stream in the call stack to have access that they would not normally have.
  • Word Pad in C#May 11, 2001. This application explores the Rich Text control in C#,its properties and methods. Explains the usage of common dialog boxes File open, File save and Font dialog box.
  • Properties in C#: New Cover on old book Jun 06, 2001. Properties are accessor methods whose job is to retrieve and set the values of fields.
  • Exception HandlingJun 12, 2001. Exceptions in C# provide a structured, and type-safe way of handling both system level and application level error conditions. The exception mechanism in C# is very similar to that of C++, with a few important differences.
  • The out and ref Paramerter in C#Jun 12, 2001. The out and the ref parameters are used to return values in the same variables, that you pass an an argument of a method. These both parameters are very useful when your method needs to return more than one values.
  • Using ref and out ParameterJun 20, 2001. When we pass a parameter as ref to a method, the method refers to the same variable and changes made will affect the actual variable.
  • What & Why : Properties :: Part 1Jun 26, 2001. If you were programming in C or C++ before coming to C#, you'll be a little bit confused about properties.
  • Time TickerJun 26, 2001. Graphics Class encapsulates a GDI+ drawing surface. The FromHWND method is used to create a new instance of the Graphics class from a window handle. Clear method fills the entire drawing surface with the specified RGB color by using Color class. DrawString method draws a string using Font and SolidBrush classes.
  • What & Why : Properties :: Part 2Jul 09, 2001. In the part 1 of this series, I discussed about the get method of the properties, with the help of which you can make your variable so that nobody can modify the value of the variable.
  • Exception HandlingJul 21, 2001. Exceptions in C# provide a structured, and type-safe way of handling both system level and application level error conditions. The exception mechanism in C# is very similar to that of C++, with a few important differences.
  • Post in Mobile FormsJul 27, 2001. Till now whatever we are doing is in single page and the traversing between forms take place only in a single Page. If you Remember Something of WML there our most effective funda is posting from one form to other.
  • Compute Feature of DataTableAug 01, 2001. The following code is for implementing least known feature of DataTable Compute() method.
  • Service ExplorerAug 06, 2001. This program manages services running in your computer. You can use the GetServices method on the ServiceController class to retrieve a list of the services on a particular computer.
  • Drawing With no OnPaint MethodAug 09, 2001. In this sample example, I draw GDI+ objects on button click.
  • Displaying Exception InformationAug 21, 2001. This is a simple utility to display exceptions. Each exception in the chain is added to an ArrayList and displayed in reverse order in a ListView control.
  • Web Browser in C# and VB.NETSep 11, 2001. This article explains how to add and web browser ActiveX to your project to developer your own customized web browser.
  • using Array Class and IEnumeration in C#Sep 14, 2001. This article illustrates the usage of Array class and IEnumerator. Array class Provides methods for creating, manipulating, searching and sorting arrays, thereby serving as the base class for all arrays in the common language runtime.
  • Enumerators in C#Sep 18, 2001. Sample example shows you how to use enumerators in C#.
  • Playing with StringsSep 18, 2001. This program explores the String class and its various methods. With this you will be able to initialize strings using different constructors and use them. To see how the methods of the 'String' class work, see the following code.
  • Uploading and Downloading Web FilesOct 05, 2001. This program is for beginner, shows how to use web client class to Download and upload file from the Internet and how to save them to disk. Download or upload file can be done using Method DownLoad Or UpLoad.
  • Abstract Classes And MethodsOct 08, 2001. This is a detailed analysis of Abstract classes and methods in C# with some concrete examples.
  • Method Parameters in C#Oct 15, 2001. This article describes different method parameters such as value parameters, reference parameters, output parameters, and parameter arrays.
  • Exception Handling in C#Oct 17, 2001. Exception handling is a builtin mechanism in .NET framework to detect and handle run time errors.
  • Web services with Language InteroperabilityOct 18, 2001. A web service in general is a way of exposing the properties and methods through the Internet In other words, it's an URL-addressable resource that programmatically returns information to clients who want to use it.
  • Pointers in C#Oct 25, 2001. C# also supports pointers in a limited extent. A pointer is nothing but a variable that holds the memory address of another type. But in C# pointer can only be declared to hold the memory address of value types and arrays.
  • Inheritance and PolymorphismOct 29, 2001. By using the concept of inheritance, it is possible to create a new class from an existing one and add new features to it.
  • Charting in GDI+Nov 07, 2001. Here is an example of creating simple charts using GDI+ commands in C#. I have used the random class to create 5 random percentage values. I then use GDI+ to plot these values on a chart.
  • Exceptions and Exception StackNov 16, 2001. The purpose of this tutorial is to explain firstly how you would go about creating your own set of exceptions to trap error conditions that could occur in your code or library, for your own benefit or for the benefit of another developer using your library. The second lesson is on how the C# exception stack works, and how you can use it to catch all types of exceptions.
  • Factory Patterns in C#Dec 10, 2001. The FACTORY METHOD PATTERN comes under the classification of Creational Patterns. The creational patterns deals with the best way to create objects.
  • Graphics Programming in C#Dec 26, 2001. The new improved version of GDI is called GDI+. The .NET framework provides a rich set of classes, methods and events for developing applications with graphical capabilities.
  • NUnit for people who can't workJan 02, 2002. In this lesson I will show how to numerically solve algebraic and ordinary differential equations, and perform numerical integration with Simpson method.
  • Exception Handling in C#Jan 03, 2002. In C# Exception is a class in the system namespace. An object of an exception is that describe the exceptional conditions occur in a code That means, we are catching an exception, creating an object of it, and then throwing it. C# supports exceptions in a very much the same way as Java and C++.
  • Using ListBox Web ControlJan 21, 2002. This article explains the ListBox Web Forms control properties and methods and how to use it.
  • .NET Framework and Web Services - Part 3Jan 31, 2002. Here I am going to explain Web methods and how to write Web methods in C# and VB.NET.
  • Creational Pattern - BuilderFeb 19, 2002. The Builder pattern allows a client object to construct a complex object by specifying only its type and content. The client is shielded from the details of the objects construction.
  • XML Web Services Type MarshalingFeb 20, 2002. This article illustrates that various data types can be passed to and returned from Web Service methods.
  • A Database Web ServiceFeb 22, 2002. This program is a Web service, which contains Web methods that return a dataset after querying a database (any database) given the connection string, the password, the database, the table, the user ID and the SQL commands.
  • Authenticate Web ServiceMar 04, 2002. In this example we will build a web service that authenticates userid and password from an a very simple MS Access database. This web service exposes only one method to the client.
  • ASP.NET Naughts and CrossesMar 22, 2002. This article demonstrates the basic techniques used to build "ASP.net Noughts & Crosses" (tic tac toe to our American friends).
  • Saving and Reading Object to/from a DatabaseMar 25, 2002. An object is a memory stream, which is hard to write using the normal methods. In this article, I show how you can save objects in a database and read back from the database.
  • Xite EncryptionMar 25, 2002. This class contains methods/functions for easily decrypting and encrypting data.
  • XML Signatures in Microsoft .NETMar 28, 2002. In this article we will explore XML Signature specification from W3C and its implementation in .NET using C#.
  • Real-time Message Logging Utility - Part 1Apr 01, 2002. A message logger is a utility that helps in logging the messages thrown from functions/programs. It is useful in critical applications as it helps to know the time taken by a function to execute, the time that the function remained idle and any messages that the function wants to be logged for further analysis.
  • Assembly Browser: Browsing a .NET AssemblyMay 17, 2002. This program lets you browse an assembly and lists the methods and the parameter name and parameter type for each assembly.
  • Custom Error Handling in ASP.NETMay 30, 2002. Structured exception handling is a fundamental part of the CLR and provides .Net programmers a great way of managing errors. In addition to CLR exception system, ASP.Net also provides ways of handling errors.
  • Understanding Destructors in C# Jun 18, 2002. This article is about understanding the working concept of destructor in C#. I know you all may be thinking why a dedicated article on simple destructor phenomenon.
  • Working with Arrays in C#Jul 09, 2002. This tutorial discusses array programming in C# and .NET. It starts with the discussion of simple arrays and then delves into more complex topics such as jagged and multi-dimensional arrays. In the end, it discusses the Array class and it's methods for searching and sorting an array's items.
  • Programming C#: Working with Arrays in .NETJul 09, 2002. This article concentrates on arrays in .NET and how you can work with arrays using C# language. Article also covers the Arrays class and its method, which can be used to sort, search, get, and set an array items.
  • Writing a Single Event Handler for Multiple ControlsJul 22, 2002. Writing a Single Event Handler for Multiple Controls by Giuseppe Russo. Jul 22, 2002. I have noticed that in many articles, I read, people use a longer method of clearing many textboxes, as well as handling more than one control at the same time.
  • dotMSN: .NET Messenger LibraryJul 25, 2002. dotMSN is a class library to make use of the MSN Messenger Service. The library is built in C# and can therefore be used by all languages the .NET environment supports.
  • Hex Colors in C#Sep 05, 2002. Currently I am developing a shareware application for generating image galleries for the web. There is a template engine built in that allows the user to specify colors as hexadecimal values, plus many other features.
  • Spiro DesignerSep 16, 2002. Spiro designer is a partial implementation of Spirograph. Spiro Designer uses the Matrix and GraphicsPath classes with their Transform and Rotate methods to build a spiro.
  • ATL COM Component, ASP.NET Web Service, and VB ClientOct 14, 2002. This article describes how to use ATL COM Components in ASP.Net web service and how to consume the ASP.Net Web Service from Visual Basic 6 Client. Ultimately the VB6 client calls the method of the COM component created in Visual C++ through the ASP.Net Web Service.
  • Drawing Shapes using ThreadingOct 25, 2002. This is simple multi-threading program that draws circles and rectangles. Each shape is handle by individual thread that created every time you press start button. Using sleep method on each thread we can change the speed of each shape.
  • ADO.NET, COBOL and Stored ProcedureDec 13, 2002. A stored procedure is basically a series of SQL statements that reside on the database. The procedure could create a new table, retrieve data from one or more tables, update one or more tables or perform many other tasks.
  • Pro Developer: Throwing Money Out the WindowDec 18, 2002. It's common knowledge among programmers that most of the ills of the software industry, and most particularly the companies where we work, could be solved by simply letting the technical people make the technical decisions. In fact, that sounds so obvious that you might be tempted to shake your head and wonder what planet I come from. Obviously, since this is so incredibly logical and sensible, it's a given that most companies leave management decisions to managers, and technical decisions to techies, right?
  • String in C#Feb 05, 2003. In this article, you will learn how to work with strings in C#. The article discusses the String class, its methods and properties and how to use them.
  • AddressParserFeb 06, 2003. The AddressParser class provides 2 static methods - ParseIpAddress and ParseMacAddress.
  • Link Fetcher ServiceMar 06, 2003. In this article we will learn how to create a Web Service that fetches all the links from a given URL.
  • How To: Printing Form Controls in C# and .NETMar 06, 2003. The other day a user asked me how to print out a form. I suggested they use my Form Capture article which catches the bitmap that the form is in by using bit belting commands from the old windows SDK.
  • Distributed Cross Platform Applications, the Easy Way Mar 07, 2003. There are many ways of transferring data from one process to another. All those methods have some advantages, but also some drawbacks.
  • Updated ReshuffleColumns MethodMar 20, 2003. Here is an updated version of 'ReshuffleColumns' method of article DataGrid Customization by Mahesh Chand.
  • Accessing COBOL Properties with C#Apr 02, 2003. This article will review a new option for exposing those assets via the use of Properties.
  • Math Equation Editor in C#Apr 07, 2003. The Equation Editor I created in C# allows you to create a few simple equations using the keyboard. With the editor you can open and save files of your equations.
  • Kuti.DataJul 02, 2003. The attached source code file has two parts - DataObject directory and Automatic SQL Generator.
  • C# Methods : Part II Jul 07, 2003. This article completes our discussion of methods. In this article, you will learn parameter passing, reference and value type parameters, and method overloading.
  • Data Access Component for SQL Server in C#Jul 07, 2003. The attached source code a data access component for SQL Server that contains methods to get a DataSet.
  • Introduction to C# Methods - Part1Jul 07, 2003. In this article, you will learn about C# methods and how to implement and use methods in a class.
  • Lengthy Operations on Single Thread in .NET ApplicationsJul 08, 2003. In this article I discuss how the lenghty operations can be handled in a .NET application. I also discuss how the stack trace can be examined to find any specific methods.
  • Trapezoidal Rule Implementation in C#Jul 23, 2003. The attached source code implements trapezoidal rule for numerical integration in C#.
  • C# MethodsAug 05, 2003. This article explains hot to define and use methods in C#.
  • Custom Exceptions using Microsoft Exception Management Application BlockSep 02, 2003. This article shows you how to use Microsoft Exception Management Application Block to write custom exceptions.
  • Remoting in .NETSep 26, 2003. Distributed computing is an integral part of almost every software development. Before .Net Remoting, DCOM was the most used method of developing distributed application on Microsoft platform.
  • Overriding Non-Virtual Implemented Interface Methods Oct 02, 2003. In the .NET framework many classes implement interfaces non-virtually. Presumably this is because it does not make any sense for those methods to be overridden.
  • Late Binding With ReflectionOct 20, 2003. Component based technology has done great things for software development, allowing reuse and leading to better-written code that separates subjects and entities into distinct components.
  • Working with Windows TabControl with C#Dec 16, 2003. Windows TabControl is a useful control that allows you display multiple dialogs tabs on a single form by switching between the tabs. In this tutorial, I will explain how to create and use a TabControl in your Windows applications with C#.
  • Automatically Break into Code When Calling Debug.AssertDec 22, 2003. This sample creates a dll that once referenced by your ASP.Net or Web Service app, just adding a small block of xml into your web.config file will cause the debugger to automatically break into your code.
  • Integrate Through Web Interfaces with C#Jan 08, 2004. This article proposes a way for integrating the enterprise applications through web interfaces. Since the web interfaces are widely available for many existing applications, the method may well reduce the cost of building an integration system with less time and get ride of the dependency on other resources.
  • Hello World in different StylesJan 09, 2004. I've attempted to write the traditional 'Hello World' in different styles. This explores the different possibilities of addressing a problem - 'Hello World' with different features of C# language and .NET framework.
  • Real Life SQL and .NET : using SQL with C#: Part XJan 13, 2004. Welcome to the world of SQL and the huge, growing database technologies of today’s business all over the SQL world. By reading this article, we have begun accepting the knowledge that will soon be required for survival in today’s world of relational database and data management. Alas, for the reason that it is first necessary to provide a background of SQL and cover some preliminary concepts that we need to know, the majority of this article is text in paragraph format.
  • DropDownList Selection as you type inFeb 09, 2004. The ASP.NET DropDownList server control allows positioning within the list by typing the first character. This method does not require a trip to the server.

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