C# Corner

Resources  
  • 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.
  • The Convert Class : Conversion Made Easy in .NETJan 08, 2001. The Convert class takes care of most of the data type conversions in .NET programming.
  • Database Explorer : Part 2Jan 22, 2001. Attached is a C# program which is a enhanced version of the previous article on ADO.NET.
  • Reading and Writing to the RegistryFeb 28, 2001. This is a class that both reads and writes to the registry that I made while converting some applications to use C#.
  • Verbatim String LiteralsMar 01, 2001. I used to wonder, if I could somehow represent "\" as "\" instead of the escape sequence for black slash ("\\") in string.
  • 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 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.
  • Image Viewer in C#Jun 07, 2001. ImageViewer lets you to view images of types bmp, gif, jpeg, ico, wmf, emf. It also allows you to convert images to bmp, gif and jpeg formats. This application illustrates the usage of PictureBox class, Bitmap class etc.
  • 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.
  • strnicmp equivalent in C#Aug 07, 2001. C# equivalent strnicmp function in C language. It accepts two input strings along with the number of positions of chars to compare.
  • Basic Database Operations in ADO.NETAug 08, 2001. This Article will show the basic database transactions select, insert update and delete.
  • CDataService: A Generic Database Access ClassAug 09, 2001. Using a generic database access component in data-aware applications can simply development and separate data tier from business tier.
  • XML GeneratorAug 17, 2001. This article is about advance use of reflection package in Csharp.
  • Boxing and Unboxing in C#Aug 20, 2001. Boxing and unboxing is a essential concept in C#'s type system. With Boxing and unboxing one can link between value-types and reference-types by allowing any value of a value-type to be converted to and from type object.
  • Super String in C#Aug 20, 2001. Today I realized that I miss those Visual Basic/Visual C++ type operators. You know the ones: Left, Mid, Right.
  • Easter CalculatorAug 22, 2001. This program calculates the dates for Easter for any given year and for an hundred years.
  • Number to Currency ConvertorSep 03, 2001. The attached Num2Cur.cs file converts number to currency up to 999,999,999,999.9999 i.e (999 billion).
  • String Jargon in C#Sep 05, 2001. The following article shows some String functions which are not currently available directly in C#.
  • Regular Expressions Usage in C#Sep 07, 2001. The source code shows how to use Regular Expressions 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.
  • IComparable: Under the HoodSep 21, 2001. We now calling Array.Sort() on C# Types such as int, char, string will automatically do sorting based on that type.
  • Is there any need to Boxing and UnboxingSep 21, 2001. With Boxing and unboxing one can link between value-types and reference-types by allowing any value of a value-type to be converted to and from type object. Boxing and unboxing enables a unified view of the type system wherein a value of any type can ultimately be treated as an object.
  • FlashCards Language Program : How to read and save Images in a Sql Server Database using ADO.NETNov 09, 2001. I thought it would be fun to write a simple program that displayed flashcards from a database and at the same time, show you how to read and write images to the database. This program is a simple flashcard program that talks to a single table in a Sql Server Database.
  • Type Conversions in c#Dec 04, 2001. Type conversion is a process of converting one type into another. Using C# type conversion techniques, not only you can convert data types, you can also convert object types.
  • C# and .NETJan 07, 2002. It is sometimes important to know the details of what the compiler does. You may want to know whether constants are evaluated at compile time, or whether constant strings are folded at compile time.
  • Hangman Program Using C#Jan 19, 2002. Hangman was created to illustrate several features of C# including GDI+, string manipulation, array processing, using properties, as well as simple creation of objects.
  • Working with Strings in VB.NETFeb 05, 2002. This article is VB.NET version of Working with Strings in .NET using C#.
  • Web/WAP Calender form Harrison LogicFeb 11, 2002. This application provides an updateable web-based calendar that can be viewed from both the Web and through a Mobile device, such as a cellular phone.
  • 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.
  • Boxing and Performance of CollectionsMar 14, 2002. In this article, I will compare some performance issues of values and references types during boxing and unboxing operations.
  • Printing Invoices using C# and .NETMar 18, 2002. This program can stand improvements but it will get you started in creating an invoice and printing it to the printer.
  • SQL Server Database ExplorerMar 20, 2002. This application connects to a running SQL Server 2000 and displays all the available databases in it.
  • C# to VB.NET Code Conversion Web ServiceMar 20, 2002. ConvertCSharp2VB is a Web Service that converts a C# code block into VB.Net. It exposes the Service Description and WSDL for the Web Service, so you can implement this functionality in your applications.
  • Poorman's Installation program in C# and .NETApr 08, 2002. Installation programs can be quite expensive these days. Although programs such as Wise and InstallShield have fantastic features and are fairly comprehensive, sometimes you just want to do the easy installation of copying and pasting files into a directory and perhaps placing a shortcut in the start menu.
  • Exocortex.DSP - A C# Complex Number and FFT LibraryApr 08, 2002. Shows how to convert an image from a spatial representation (i.e. picture on the left) to a frequency representation (picture on the right) using a 2D fast Fourier transform.
  • Gene Expression Programming (GEP) in C# and .NETApr 11, 2002. Gene Expression programming (GEP) is a subset of Genetic Algorithms, except it uses genomes whose strings of numbers represent symbols. The string of symbols can further represent equations, grammars, or logical mappings.
  • Communication Between Two Forms: Part-IIJun 24, 2002. Last time I wrote about the possibility of sending a string from a textbox in one form to another.
  • PDF ConverterAug 26, 2002. This is a PDF converter tool which can reads text documents and converts them to PDF documents.
  • Personalizing Mobile Web ApplicationsSep 16, 2002. In this example, we will personalize the settings for a mobile web application based on the user logged into the site.
  • StringBuilder and String ConcatenationOct 01, 2002. String concatenation is one of the commonly used operations among programmers.
  • How to Fill Your Own Dynamic Objects using ADO.NETOct 02, 2002. Sometimes you need to use information of different types like strings, booleans or doubles in the same data structure.
  • Converting C# to COBOLOct 18, 2002. In this article we'll take a look at some C# samples of code and then translate those samples into COBOL.
  • More AI...(GEP) Gene Expression Programming in C# and .NETNov 04, 2002. Gene Expression programming (GEP) is a subset of Genetic Algorithms, except it uses genomes whose strings of numbers represent symbols.
  • C# Versions of Java's StringTokernizerJan 13, 2003. Here is another C# version of the Java StringTokenizer Class from the version posted August last year on your site. Given a string and a set of delimiters, the class return an enumeration of substrings based on the delimeters passed in.
  • Strings in C# Part 2Feb 05, 2003. This article discusses how to format, trim and pad strings using the String class. The article also covers the StringBuilder to effectively deal with string such as string concatenation,
  • 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.
  • Creating a Web User Control in .NETFeb 05, 2003. One of our C# Corner readers gave me the idea of converting my Add/Remove Control from a Windows Form control to a User Web Control, so we will use this control as an example for this tutorial
  • Run Time CompilerFeb 07, 2003. In this article, I am going to discuss how to take a string then compile it and then how you execute it.
  • Histogram Code in C#Apr 01, 2003. C# histogram class maintains a histogram of input data. Input data is sorted into bins and a count is kept of how many data points fall into each bin.
  • Implementing Custom Paging in ASP.NET DataGrid ControlJun 01, 2003. This article shows you how to implement custom paging in ASP.NET DataGrid control.
  • Java Like StringTokenizer in C# Jun 11, 2003. The StringTokenizer class is yet another implementation of a java-like StringTokenizer in C#.
  • Formatting ASP.NET DataGrid's DataJun 17, 2003. This article shows you how to change the color of a DataGrid row and format of date.
  • HTTP Handlers for Images in ASP.NETJun 23, 2003. Have you ever thought of streaming thumbnails just by passing query string indicating width or height of thumbnail you need, and most importantly passing those to image itself?
  • Creating ASP.NET Controls DynamicallyJul 10, 2003. This article shows you how create ASP.NET controls dynamically and fill data from a database.
  • Format DateTime Values in XML Extracted From DataSet Jul 17, 2003. In this article we'll see how to specify the format of DateTime values extracted from the ADO.NET DataSet and to verify we will write formatted contents in xml file.
  • Deleting a DataGrid Data Based on a Column ValueJul 24, 2003. In this article we'll see how to delete the records of a DataGrid based on a column value in the database table.
  • Edit/Update a Chosen Database RecordDec 09, 2003. This article and available source code shows how to edit and update a database record through a DataGrid control
  • State Management in Web FormsFeb 18, 2004. This white paper discusses the ways in which the state management can be handled in web forms. State management can be done either on client side or server side as explained below.
  • Oracle Data Provider for .NET : Part IIFeb 20, 2004. Oracle Data Provider for .NET (ODP.NET) is an implementation of a data provider for the Oracle database. ODP.NET uses Oracle native APIs to offer fast and reliable access to Oracle data and features from any .NET application.
  • Image Processing in C#Apr 13, 2004. This application explains basic concepts of image processing including brightening, converting to gray and adding notes to an image using C# and GDI+.
  • Transforming Visual Studio .NET Projects into NANT files using XSLT and .NETApr 16, 2004. I was looking for a solution on how to execute an XSL transform on a C# project file and convert it to a Nant build file. Nant provides the xsl file to do the conversion under the open source license agreement, but Nant does not provide away of producing the transformation.
  • Refactoring in Visual Studio 2005Jun 11, 2004. Refactoring allows developers to use the built-in feature of Visual Studio to rename and convert and change the signatures and definitions of a class members. In this article, I will show you how refactoring feature provided by Visual Studio 2005 can be a handy tool when you are reorganizing or optimizing your existing projects.
  • Multithreaded XML Document for Read/Write AccessJul 21, 2004. This article describes a process for using a ThreadPool within a windows service that monitors other services. It also shows how to allow multithreaded read/write access to an XmlDocument, that acts as persistent storage, using a Mutex.
  • Formula Generator - A Regular Expression Generator Class in C# and .NETAug 17, 2004. The attached source code is a class - FormulaGenerator, which is a component that interprets and evaluate a string expression
  • A Scheduled Application Launcher Service in C# and .NETOct 06, 2004. This an article is on launching scheduled tasks. Not quite as exciting as launching a spaceship into outer space, but…hey, even astronauts have to automate some of their day to day activities.
  • Generating Random Number and String in C#Nov 19, 2004. The Random class defined in the .NET Framework class library provides functionality to generate random numbers. This article shows you how you can use this class to generate random numbers and strings and even combination of both.
  • Using ListBox in C#Dec 28, 2004. The source code demonstrates how to use a listbox control in C# - adding, deleting and altering strings.
  • How to Insert a Date Into DateTime Column Using ADO.NET & C#Feb 04, 2005. In this article, we will show how to insert a date into a date column using ADO.NET and C#.
  • Edit Almost Anything with AgileStudioMar 15, 2005. There are a range of controls available as standard for Windows Forms in VisualStudio .NET 2003. These include TextBox to edit strings, CheckBox to edit booleans and even a DateTimePicker. However there is a vast range of types available in .NET.
  • Convert a Comma Delimited String to an Array in C#Aug 01, 2005. This article shows how to convert an array to a comma delimited string in C#.
  • How do I Convert a String to an Enum Value?Sep 10, 2005. In this How do I, you will learn how to convert a string to an enum value in C#.
  • Migrating from Java to C# Oct 03, 2005. Microsoft has created a tool called Java Language Conversion Assistant (JLCA), which automatically converts Java code into C# for developers who want to move existing applications to the .NET Framework.
  • Convert an Enum to a StringOct 24, 2005. This article shows how to convert an enum value to a string value.
  • Using XML and XSLTJan 18, 2006. XML Stylesheet Transformation(XSLT) is defined as a language for converting XML documents to other document formats. This article shows how to perform the transformation using classes of .NET Framework.
  • Creating ASP.NET Photo Album using FileSystem as DataFeb 13, 2006. Memories Photo Album is ASP.NET application which allows you to easily create online photo album just by specifying folder containing subfolders and images. I created this application to share personal photos with friends and family, last month I converted it to .Net Framework 2.0 and decided to share with community.
  • Displaying Single Table Database Hierarchy with DataSet and DataRelationsMar 03, 2006. Hierarchies can be difficult to store SQL tables and even more difficult to query and display. This Example will show you how you can use DataRelation to convert single table hierarchy in to nested XML and then use XSLT to transform it to nested list.
  • Convert Long to Short File Names in C#Mar 17, 2006. Here in this article is very simple code for short to long and long to short file names conversion.
  • Server.Transfer : Passing Values from One Page to Another PageJun 19, 2006. Some times, we want to pass values from one page to another page. There are many ways by which we can do this like: by using query string, or session variable, or Server.Transer etc. This article shows you, how to pass values from one page to another page by using Server.Transfer method.
  • Regular ExpressionsJul 05, 2006. The purpose of this article is to build upon the existing pool of regular expression articles by providing an overview of the new regular expression features found in .NET and to offer some guidelines as to when and how to use them.
  • Serializing and Deserializing XML StringJul 20, 2006. In this article we will see how we can serialize a xml sring into an object and vice versa. You can serialize your object to a byte array and can deSerialize the byte array into an object.
  • Image Conversion Utility in C#Sep 14, 2006. This article describes a very easy approach to building an image conversion utility that will permit the user to open a supported image type and convert it to another supported image type.
  • Encrypting Connection Strings in ASP.Net 2.0Oct 05, 2006. This article describes how to encrypt the connection strings section in ASP.Net 2.0 web.config files and demonstrates the transperancy of using encrypted connection strings in your web application.
  • How to Convert String to Hexadecimal and Vice versaOct 31, 2006. This article shows you how to convert string to hexadecimal and vice versa. I did this program for my smart Card application.
  • Working with HashTable in C# 2.0Nov 13, 2006. We often need to store more than one dimension data in a list and data may not be an integer or string. This article shows how to use the HashTable class to store object type data.
  • ASP.Net State Management TechniquesJan 02, 2007. This article gives brief introduction to various state management techniques in ASP.NET.
  • Convert a DataGridView to a BitmapJan 19, 2007. This article describes an easy approach to converting a DataGridView control into a Bitmap.
  • Generating ASCII Art from an Image using C#Mar 05, 2007. Have you ever tried converting a standard JPEG/Bitmap image into a fascinating ASCII art ? In this article I'll show you exactly how to do it.
  • Add a Quick Map to a Windows ApplicationMar 15, 2007. This project demonstrates a quick and easy way to add mapping to a windows desktop application (with an available internet connection) using Google Maps as the basis and source for the map.
  • Hiding the Date in a Date Time Picker ControlMar 26, 2007. This very short article will address an extremely easy way to hide the date value contained in a date time picker control. While the control contains no property that will allow you to hide the current date, nor to set the value of the control to null or an empty string, it is still possible, and even very easy to generate a date time picker control that does not display a date.
  • Word to HTML Converter using ASP.Net 2.0 and Microsoft 11.0 object LibraryMar 26, 2007. This article uses "Microsoft 11.0 object library" & process the word document in the backend and convert to HTML document.
  • Regular Expression Usage in .Net EnvironmentApr 19, 2007. This article describes how to use regular expression in .Net.
  • Parsing Sentences and Building Text Statics in C#Feb 15, 2008. This article describes three approaches for parsing the sentences from a body of text. This demonstration application also describes an approach to generating sentence count, word count, and character count statistics on a body of text.
  • Building a UNIX Time to Date Conversion Custom Control in C#Feb 15, 2008. This article addresses the construction of a custom control that will convert UNIX time into useful and readable dates for display in a Win Forms application.
  • How to Convert XLS File into CSV File in C#Feb 27, 2008. The article shows you a simple way to convert an XLS file into a CSV file by using a small C# program
  • Convert WinWord Document to BlobFeb 27, 2008. This article tells you how to convert WinWord document to Blob and save it in a datarow.
  • Extending The String ClassMar 17, 2008. This article will show you a technique (new for C# 3.0) that allows you to extend the string class inside the .NET framwork to include your own string methods.
  • Working with the ObjectDataSource and DateTime TypeApr 07, 2008. This tip will help you to work with the ObjectDataSource, when at least one of the properties of your business object (BO) is type of the DateTime .
  • Add and handle application settings in the configuration file: Part IIApr 16, 2008. This article tells you how to add connection string using the configuration file itself.
  • Add and handle connection strings in an application configuration file: Part IApr 17, 2008. There are two ways to save data and parameters. In this case we save application parameters like information entered by the user during the installation process.
  • Encrypt and Decrypt Sensitive Metadata Within Your Config file Jun 18, 2008. In a certain cases, metadata embedded within your configuration file is sensitive. In fact, imagine that you develop an application that uses a data base as data source; all information about this data base is located in the configuration file. What if a hacker success to log into your configuration files and obtains the connection string and other metadata about your data base??

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