C# Corner

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  • Asynchronous Request in .NET (C#)Jan 09, 2000. This code sample shows how to call a COM component in .NET framework using C#.
  • Simple Web File DownloadMar 23, 2001. This is a simple program that shows how to download files from the web and save them. The program uses the HttpWebRequest and HttpWebResponse classes to request and retrieve the requested file.
  • Web Request ClassApr 04, 2001. This is a simple application that the gets the source of a webpage via the WebRequest Object.
  • Assemblies : The Ins and Out : Part IApr 13, 2001. In Part 1, I will cover what exactly an assembly is, and what an assembly contains.
  • Assemblies : The Ins and Out : Part IIApr 16, 2001. In this part, I will discuss both Private and Shared assemblies and how to create a "Shared Assembly".
  • Assemblies : The Ins and Out : Part IIIApr 20, 2001. In this part I will discuss in more detail than Part 2, the available utilities for manipulating assemblies.
  • Quote ResponderMay 09, 2001. The program will periodically check your mail for incoming email requests for a stock quote.
  • Wireless Model : How Does It Work?May 09, 2001. The browser sends an HTTP request to the Web server, which interprets the request and determines which resources to retrieve or execute. If the URL specifies a file, then the server sends it back.
  • Catch Hold of Device CapabilityJun 05, 2001. If you are developing Mobile Application and been through the different standards in Market.
  • PDF File GeneratorJul 26, 2001. PDF documents are the now a days is standard in Documents Exchange over the internet,as these documents are more or less platform independent and can be viewed on virtually any platform without any formatting or changes in the file structure.
  • Simple Sniffer in C#Dec 03, 2001. This program shows you how to retrieve data from a packet using Sockets.
  • Command Patterns in C#Mar 04, 2002. Command pattern encapsulates a request as an object and gives it a known public interface. Command Pattern ensures that every object receives its own commands and provides a decoupling between sender and receiver.
  • IP LookUp Program in .NETApr 03, 2002. This is an IP look up program that uses C# Windows Forms and IPHostEntry to resolve the DNS request.
  • DataGrid Customization: Part-1Jun 25, 2002. In this article, I will discuss some DataGrid customization tips such as how to I get the name and index of the column headers and how do I find out if mouse click right click was on a column.
  • DataGrid Customization Part-II: Custom Sorting and DataGrid Column HidingAug 13, 2002. How to I get the name and index of the Column headers? How do I find out if mouse click right click was on a column
  • Working with COBOL Data Groups in C#Sep 11, 2002. In this article we will begin with a C# console application calling a COBOL DLL file. The C# application will pass it a number of occurrences to create in the table (much like a user requesting a specific number of months to report on).
  • Synchronized Threading in .NETDec 11, 2002. Threads are a powerful abstraction for allowing parallelized operations: graphical updates can happen while another thread is performing computations, two threads can handle two simultaneous network requests from a single process, and the list goes on. Since threads are pretty simple to understand, conceptually, but, practically, they are a cause for programmatic headaches, I decided to write this program to describe how to make use of threads.
  • The "ins" and "outs" of Using Stored Procedures in C#Jan 27, 2003. This article reviews the creation of stored procedures with parameters using the Visual Studio IDE.
  • J2EE to .NET Migration: Quick TipsMar 26, 2003. Here are some Quick tips to get you started, in case you need to migrate a J2EE based application to a .NET based application.
  • Basics of Extending Your Working Environment in Visual StudioApr 10, 2003. All of us have used Macros in Microsoft Office and Add-ins in Visual Studio 6 and I am very sure all of us have been impressed as well by their power to control their own working environment.
  • 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?
  • How to Change DataGrid Header Text?Jun 30, 2003. This article shows you how to change the header text of a DataGrid programmatically.
  • Introduction to ASP.NET HTTP ModuleNov 24, 2003. This article will help the users to examine the use of HTTP Modules and their use in extending the pipeline. The HTTP Pipeline is a series of extensible objects that are initiated by the ASP.NET runtime in order to process a request.
  • Reading and Display Source of Web PagesDec 30, 2003. This sample project is made to help ASP.NET developers. This projects highlights how to add HTML page inside your ASP.NET page which is hosted on same or different webserver. This page can still run on that server and only output is included in the ASP.NET page.
  • Image Resizing : Part IIJan 12, 2004. In my first article Image Resizing and FTP, I showed how I resize my digital camera pictures and FTP them to the web. I received a couple of requests to share the code for the image gallery on my web site that I use to view them so here it is.
  • SOAP, .NET, and COM an Introduction - Part IIIFeb 02, 2004. This article starts with the basics of SOAP, SOAP XML model and its data types followed by the integration of SOAP functionality in .NET class library and how .NET developers can take advantages of SOAP in their applications.
  • SOAP, .NET, and COM - An Introduction: Part IFeb 02, 2004. This article starts with the basics of SOAP, SOAP XML model and its data types followed by the integration of SOAP functionality in .NET class library and how .NET developers can take advantages of SOAP in their applications.
  • Using SOAP Header and SOAP Extensions in a Web ServiceApr 12, 2004. In this article, we will develop a web service that would authenticate users for web sites. The web site needs to pass the user ID as well as the password for the user. Apart from this the web site also needs to pass the site’s ID and password.
  • HTTP Handlers in ASP.NETAug 24, 2004. The low level Request and Response API to service incoming HTTP requests are HTTP Handlers in ASP.NET. All handlers implement the IHttpHandler interface, which is located in the System.Web namespace. Handlers are somewhat analogous to Internet Server Application Programming Interface (ISAPI) extensions.
  • Microsoft Application Center TestOct 13, 2004. Application Center Test (ACT) stress tests Web servers and analyze performance and scalability problems of Web applications. ACT simulates a large group of users by opening multiple connections to the server and rapidly sending HTTP requests. It also supports several other authentication schemes and the SSL protocol, making it ideal for testing personalized and secure sites.
  • Performance Improvement in ASP.NET Using CachingFeb 01, 2005. ASP.NET provides caching at several levels for you to leverage and improve the responsiveness of your application by storing the page output or application data across HTTP requests and reuse it. This allows the web server to take advantage of processing the request without recreating the information and thus saving time and resources.
  • Web Based Chat ApplicationMar 15, 2005. The article explains about devloping a chat Solution in ASP.Net / C# which is differnt than any of the available solutions and works under any firewall and browser settings.
  • Count Image Requests from a Web Server using ASP.NET Mar 19, 2005. This article explains you how we can count Image request from a Web server using C# and ASP.NET.
  • Count Image Requests from a Web Server using ASP.NET (VB.Net)Mar 19, 2005. This article explains you how we can count Image request from a Web server using VB.Net and ASP.NET.
  • Mobile Web Application SecretSep 12, 2005. This article gives you a clear idea how an ASP.NET Web Application rendering works differently on hand held devices than running Web Applications on normal machines.
  • How to Select all Checkbox when Header Checkbox is SelectedDec 30, 2005. Here I have provided the code using javascript to check/uncheck all checkboxes when header checkbox is checked. I recommend JAVA Script because its executed at client side and saves request Round-Trip time.
  • ASP.Net 2.0 What's new in Page Life CycleJan 07, 2006. ASP.NET 2.0 adds some new events to allow you to follow the request processing more closely and precisely. This article looks into those events.
  • Credit Card Fraud Prevention using .NET Framework in C# or VB.NETJan 16, 2006. How can you protect your business from credit card frauds? This article have few steps that can be taken to ensure that the transaction is being requested by the real cardholder.
  • AJAX Repeater control Feb 19, 2006. AJAX has been in shadows for a decade now but it started buzzing right after the launch of the Google Earth. This article shows how to create an AJAX Repeater control with item, header, footer, alternative item, and seperator item templates using AJAX and ASP.NET.
  • ASP.Net Page Life CycleMay 16, 2006. This article explains simple ASP.NET web page execution in depth.
  • Troubleshooting Tips for ASP.Net DevelopersMay 22, 2006. This article explains three silly problems that ASP.net developers regularly face and explains how to tackle them.
  • The request failed with HTTP status 401: Access DeniedJun 30, 2006. An unhandled exception occurred during the execution of the current Web request. Please review the stack trace for more information about the error and where it originated in the code.
  • The request failed with HTTP Status 405: Method Not Allowed.Jul 04, 2006. PDSTest.NET Exception Occurred while processing the request. The request failed with HTTP Status 405: Method Not Allowed
  • Tip: How to use Multiple Page Headers in Crystal Reports?Jul 21, 2006. Recently, I came across a problem in Crystal Reports. I wanted to display a separate page header on the first page of the report than the rest of the page.
  • Tip: How to add a Page Header to a Sub Report in Crystal Reports?Oct 09, 2006. Sub Reports in Crystal Reports do have report headers but do not support page headers. Wonder why? We can mimic the functionality with the help of a formula and a Group.
  • Using SOAP Headers to Validate ClientsMay 18, 2007. In this brief article I will attempt to show you how you can use SOAP headers within your web service to validate clients and thereby secure your service from unauthorized usage.
  • WEB farm - Load Balancing in Asp.netJul 27, 2007. The concept behind the web farm is that a number of different web sites share pooled resources. They typically share a common front-end dispatcher to perform load control and distribute customer requests. They share the multiple web servers themselves.
  • Introduction to Building a Plug-In Architecture Using C#Sep 10, 2007. In this article we'll take another look at how we can use the state pattern to build a plug-in architecture that will allow us to change the behavior of our application by placing differnt plug-ins into a folder.
  • Read Asp.net Request Param and Session dynamically into propertiesOct 04, 2007. This Article shows how you can use Attributes and Reflection to dynamically populate property with value from param, session or context without writing any addition code. I have used this technique in past and I hope you will also find it useful.
  • Ajaxify a simple HTML page using a web service Oct 23, 2007. In this article I will explore using a web service to deliver HTML markup content to an HTML aware client using the XML HTTP request object from JavaScript code.
  • State Management is Silverlight using Isolated StorageJul 28, 2008. State management is the process to maintain state and page information over multiple requests for the same or different pages. State management in Silverlight 2 can be done using the concept of Isolated storage.
  • Attaching a Digital Certificate (Public Key) to an HTTPS RequestAug 10, 2008. This article will guide you on how to post data to an HTTPS (i.e., secure connection) URL from a Windows application (.NET) by attaching a digital certificate from a certificate file and getting the response back.
  • ASP.Net Worker Process and ISAPINov 28, 2008. The "Process" which is responsible for processing Asp.net application request and sending back response to the client , is known as "Worker Process". All ASP.NET functionalities runs within the scope of this process
  • The Two Interceptors: HttpModule and HttpHandlersDec 23, 2008. Many times we want to implement pre-processing logic before a request hits the IIS resources. For instance you would like to apply security mechanism, URL rewriting, filter something in the request, etc. ASP.NET has provided two types of interception HttpModule and HttpHandler.
  • REST FundamentalsFeb 04, 2009. REST stands for Representational State Transfer, is an architectural style where you can build the software system in which clients (user agents) can make requests to the services [end points]. REST one of the ways to implement the client\server architectural style. REST can be used to build software applications in which clients can make requests of services.
  • Introduction to Visual Studio Add-insMar 03, 2009. This article explains about Visual Studio 2008 Add-ins.
  • Introduction to Interfacing Win Forms with VS Add-insMar 04, 2009. This article explains about integration of Windows Forms with Visual Studio Add-ins.
  • Paging and Sorting ListViews with ASP.NET MVC and jQueryMar 23, 2009. This article provides a simple example of using jQuery along with the jQuery tablesorter and tablesorter.pager plug-ins to provide sorting and paging support for a listview within the context of an ASP.NET MVC application. JQuery has partnered with Microsoft and is now integrated within the IDE to include the availability of intellisense support.
  • Customizing codeplex frozen header gridviewApr 13, 2009. This article depicts the customization of codeplex frozen header gridview to retain its scroll position across postbacks.
  • Changing the DNS or URL (host header) in SharePoint 2007 SiteMay 05, 2009. In this article we will see how to map the sharepoint site with public IP using Alternate Access Mappings.
  • Faster Performance of Deployed ASP.Net SitesMay 14, 2009. This article provides a few tips to ensure your deployed ASP.Net always runs with the best possible performance and no security information leakages.
  • Connecting your Silverlight Applications to Web and Data services (WebClient)Jun 23, 2009. Silverlight application can access simple HTTP request through WebClient Data Services
  • GridView Multicolumn sortingJul 09, 2009. GridView's built-in sorting can be enabled by setting a data source and AllowSorting property to true. Click on column header to sort based on the SortExpression specified in the Gridview column. However, Gridview does not support multi column sorting which is required in day to day application. So here is how I tried to create one:
  • LINQ Deferred ExecutionAug 24, 2009. In this article we will see how LINQ defers the execution of the query till you request the results. Plus, learn how to execute the query immediately.
  • Understanding the Page Life Cycle of an ASP.NET and its controlsSep 02, 2009. In this article I will explain about series of steps and events that occur in a page life cycle in ASP.NET.
  • Requesting Admin Approval at Application StartOct 16, 2009. Learn how to make your application requests UAC elevation (in Windows Vista and later versions) at start.
  • Row Header in DataGrid in Silverlight 3Nov 24, 2009. DataGrid in Silverlight 3 has Row Header, but by default it is collapsed. We will see how it can be useful to a DataGrid display.
  • ListBox Group Header Expand and Collapse in WPFDec 08, 2009. In this article we will see how can we expand and collapse the header and its contents.
  • Hide/Un-Hide Columns using Context Menu in DataGrid in WPFFeb 24, 2010. In this article we will see how we can add a ContextMenu for the Header and that will perform our Hide/Un-Hide function in Datagrid.
  • ASP.NET application and page life cycle Apr 19, 2010. In this article we will try to understand what are the different events which takes place right from the time the user sends a request, until the time request is rendered on the browser.
  • Custom WSE 3.0 Policy Assertion - Modifying the Security Header Generated by WSEMay 04, 2010. Recently I encoutered an issue in the WSE security header of an ASP.Net application consuming a Java web service using WSE 3.0 involving the automatic addition of a timestamp in the security header when the UsernameToken is added to the RequestSoapContext.
  • Routing in ASP.NET4May 11, 2010. Routing Allows us to build friendly URL's by decoupling the URL of the HTTP Request from the physical path of the web form that serves the Request.
  • A Project Report In WPF (R-Office Management System)May 12, 2010. This is a small office management system. With the help of this project all office employee can connect with each other, request online leave, get birthday reminders, get status of present/absent employees and use an automatic attendence system when logged in and logged out. Just need to install and setup of this project to every machine.
  • Add Image on DatagridView Cell HeaderMay 26, 2010. This tip shows how to add images to a Windows Forms DataGridView control cell header using VB.NET.
  • Custom Row and Header Height of Datagrid in WPFJun 25, 2010. In this article we will see how we can customize the row height and header height in datagrid in WPF.
  • Implementing the HTTP Request/Response Model inside of SilverlightJul 26, 2010. In this article we will see how to implement the http Request/Response Model inside of Silverlight.
  • HTTP Modules in ASP.NET Request life cycleAug 20, 2010. HTTP module is a .NET Framework class that implements the IHttpModule interface, they called as ISAPI filter in IIS stack so modules are counterpart in ASP.NET, have ability to intercept and handle system events and other modules events.
  • Encapsulating the GridView ExportersSep 16, 2010. The objective of this article is to extend a GridView control exporting functionality and at the same time create an encapsulated library to do so.
  • How to handle error- Cannot open database "MSCS_Admin" requested by the loginSep 20, 2010. In this article you will learn how to handle error- Cannot open database "MSCS_Admin" requested by the login. The login failed.
  • Introduction about Command Design PatternSep 21, 2010. The Command pattern creates distance between the client that requests an operation and the object that can perform it.
  • SQL Server CachingNov 09, 2010. This article shows to configure SQL Server and ASP.NET to cache page requests in order to reduce server load, until the data on which the page depends has been updated in SQL Server.
  • Screen Scraping using System.NetJan 17, 2011. Screen Scraping is used to extract data from a web page by scraping it instead of more direct access. It involves requesting the page and then parsing the response. It is useful in situations where direct access to the data is not there.
  • Populating AutoCompleteTextbox via WCF Service Asynchronously in SilverlightFeb 02, 2011. So here in this article we will use a WCF web Service to pull the data and populate in textbox, and also apply custom filtering to populate only those data for which user is requesting.
  • HTML 5 Storing Data on the Client without using CookiesFeb 03, 2011. Cookies are not suitable for large amounts of data, because they are passed on by EVERY request to the server, making it very slow and in-effective.
  • FileUpload saving data to SQL Server tableFeb 10, 2011. This article describes two simple ASP.NET pages for handling the stuff; one page for uploading and saving files to a SQL Server table and one for sending the selected file back to the user when requested. There is also a db class for the database jobs, separating the logic from the presentation layer.
  • Performing Button or Link Click Server Side Functionality into a New WindowFeb 15, 2011. A common scenario here is that we have a button (or link) that when clicked we want some server code to fire but at the end of the request we actually want to display the content in a new window.
  • Behavioral Design Pattern for .NET: Part 1Feb 17, 2011. Behavioral Design patterns are the patterns for .Net in which there is a way through which we can pass the request between the chain of objects, or we can say that it defines the manner to communicate between classes and object.
  • Behavioral Design Pattern for .NET: Part 2Feb 18, 2011. Behavioral Design patterns are the patterns for .Net in which there is a way through which we can pass the request between the chain of objects, or we can say that it defines the manner to communicate between classes and object.
  • Create your first HTTP Handler in ASP.NET 3.5Mar 21, 2011. The HTTP handler is the most important ingredient while handling ASP.NET requests.
  • Creating Credential Store for Form Authentication in ASP.NET 3.5Mar 22, 2011. When we don’t want to validate user on window credential, in such cases we can take help of ASP.NET infrastructure for implementing our own authentication infrastructure which includes custom login page that validate user against credentials like database and later established security context on each request.
  • Security model of Internet Information Services for ASP.NETApr 28, 2011. IIS has its own security configuration and even for any request reaching the ASP.NET runtime, IIS verifies the request with it's own security configuration.
  • Hour 4: Understanding 5 ASP.NET State management techniques in 5 hoursApr 28, 2011. Session State Management is a storage mechanism that is accessible from all pages requested by a single Web browser session. Therefore, you can use session state to store user-specific information.
  • Cross Domain AJAX Request Using JQueryMay 17, 2011. Cross Domain AJAX request using JQuery loading the RSSFeeds asynchronously from feedburner url in your website.
  • What's New in ASP.Net MVC 3 Controllers: Part 2May 25, 2011. In this article we are going to explore ViewBag and Request Validation - AllowHTML.
  • Convert Rows to Columns in SQL ServerMay 29, 2011. This article will help to convert values in rows to column/fields name or headers.
  • Display images inside a GridView in Android using VS 2010Jul 14, 2011. The GridView view mode displays a list of data items by binding data fields to columns and by displaying a column header to identify the field. The column cells and the column header of a GridViewColumn have the same width.
  • Storing Compilation And Deployment of a Java ServletJul 27, 2011. It is technology to create dynamic WebPages. This is a Java program, which resides in a web server to process requests from the user and to provide a dynamic response to users.
  • Creation of a Java Bean And How it is Used in Java Server PagesJul 29, 2011. Here you will see how to create a Java bean and how it is used in Java Server Pages (JSP)
  • Create Tag Library Descriptor And Use in JSPJul 30, 2011. It is a process to create user-defined tags which can perform any task in the server. It provides a facility to separate Java code or scriptlet from JSP. This tag follows XML syntax.
  • Ins Tag in HTML5Aug 02, 2011. The ins tag defines text that has been inserted into a document.

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