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Web Service Authentication Via SOAP Headers
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| Total Hit (718) |
While working with web services one of the commonly faced question is - How do I secure my web service? One aspect of security is preventing anonymous access to the web service. This can be done in various ways such as passing user id and password with each web method call. One elegant alternative i
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Handling Timeouts in Web Services
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| Total Hit (760) |
While developing web applications you should also consider factors like network downtime and server crashes. The same applies to developing web services. When you call a method from your client by default it waits infinitely for the response. This means if server hosting the web service is down then
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Changing Target Web Service At Runtime
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| Total Hit (808) |
While developing clients for web services, we typically add a web reference to the web service by specifying URL of the .asmx file. Adding a web service in VS.NET generates required proxy object. However, it may happen that after adding the web reference the web service is moved to some other locati
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Creating a Windows Service using VB.NET Part-I
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| Total Hit (622) |
Microsoft introduced long running background application called Services along with Windows NT Operating System. These services are multithreaded. Writing a windows NT Service using VB 6 was a tedious job. However, VB.NET masks the task much easy. In this article I will show you how to create a simp
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Monitoring File System Events
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| Total Hit (1269) |
In some applications like file system explorers, file managers etc. it becomes necessary to keep an eye on file system changes. In traditional tools like VB6 this task usually required some third party component or Windows APIs. In .NET the FileSystemWatcher class from System.IO namespace provides e
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Introduction to .NET Reflection
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| Total Hit (1231) |
Reflection is ability to find information about types contained in an assembly at run time. Prior to .NET languages like C++ provided such ability in a limited sense. .NET provides a whole new set of APIs to introspect assemblies and objects. All the APIs related to reflection are located under Syst
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Multithreading in VB.NET
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| Total Hit (1556) |
In past developing multithreaded applications in VB was tedious task. Many times spawning new threads actually spawn errors :-) The picture has changed in VB.NET. VB.NET now has simplicity of Java while dealing with threads. We will see a simple example of running your code in a separate thread in f
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Tracing Features of ASP.NET
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| Total Hit (740) |
If you were an ASP developer in past, you know how difficult it was to debug your applications. Commenting and un-commenting those Response.Write statements was a nightmare for most of the developers. ASP.NET simplifies the debugging and tracing process a lot. This in depth article takes you through
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Developing multilingual applications in ASP.NET (Part - I)
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| Total Hit (731) |
Developing a multilingual applications always requires careful thought on the method used to implement multilingual support. .NET provides some easy to implement features that help in the overall process. In this part of the article we will see the commonly used terms in this context and how ASP.NET
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Developing multilingual applications in ASP.NET (Part - II)
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| Total Hit (727) |
In the last article of this series we saw how ASP.NET built-in controls such as calendar, provide multilingual support. The main part of your web forms, however, will consist of labels and similar text that also need to be in the respective language. This part of the article will tell you how to do
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Developing multilingual applications in ASP.NET (Part - III)
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| Total Hit (751) |
The previous article of this series explained how to read resources stored in a resource file (.resources). Though that approach works in many situations one drawback was that you need to provide physical directory path to load the resource file from. This means you should know where the resource is
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Highlighted Hovering and Anywhere Selecting A DataGrid Row
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| Total Hit (716) |
Recently while working for one of my client I came across a requirement such that:
«LI»DataGrid should not have select button to select a row. This was necessary to save some screen space.
«LI»Still when the user clicks on any of the DataGrid row (on any column), that row should be selected and
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Using Windows and Forms Authentication Together
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| Total Hit (798) |
ASP.NET provides two main ways to secure your web applications. They are - Windows authentication and Forms authentication. Windows authentication uses windows users names and passwords to authenticate them where as Forms authentication typically uses user ids and passwords stored in some database.
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Implementing Role Based Security in ASP.NET
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| Total Hit (890) |
In many applications in addition to authenticating users you need to authorize them based on their roles. In this article we will see how to use Windows built in as well as custom roles to authorize users of your application.
This article will cover folloing topics
«LI»What are Principals, Rol
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Using Server.Transfer and EnableViewStateMac to Preserve Form State
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| Total Hit (839) |
In classic ASP all of you must have posted one form to another by setting the action attribute. However, this doesn't work the same with ASP.NET. The web form model requires that each form be posted to the same form. If you want to transfer control from one web form to another you need to use Server
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Tracking File Downloads
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| Total Hit (827) |
If you run a web site that allows visitors to download some kind of files (ZIP, DOC etc.) then you may probably also want to track how many visitors downloaded the file. Such data is provided by sophisticated web site monitoring tools but if you do have use one, you can develop your own mechanism to
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Detecting Browser Capabilities
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| Total Hit (1008) |
Many web applications provide client side functionality based on the capabilities of browser. ASP.NET provides an easy way to get capabilities of browsers. The capabilities of a browser include things such as whether it supports cookies,javascript and ActiveX controls and browser type and version. B
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Creating Lookup Screens using ASP.NET, XML and JavaScript
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| Total Hit (806) |
Lookup screens are dialog boxes that allow you to pick a value from a list of values. This article tells you how to use IE, JavaScript, XML and ASP.NET web forms to create a generic lookup screen that is flexible and configurable via XML.
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Using Radio Buttons To Select DataGrid Row
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| Total Hit (476) |
DataGrid allows you to put any controls inside a template column. You must be thinking that on the same line one can add RadioButtons web control as well. However, there is a catch. Radio buttons behave as a single group based on their GroupName property. When put inside DataGrid, DataGrid acts as t
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Caching Techniques In ASP.NET - Part I
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| Total Hit (802) |
In order to build scalable web sites it is important to optimize the way your web pages are served to the user. Consider a web site that provides a list of certain products to the user. The products are not going to change frequently. In traditional ASP such product catalog page will be processed ea
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Caching Techniques In ASP.NET - Part II
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| Total Hit (812) |
Just like we can cached the output of web forms and user controls we can also cache data i.e. variables, objects of our application. This is possible via a special object called Cache. Cache object is similar to application object in that it exists for the entire application. It differs from applica
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Creating Dialog Boxes using ASP.NET, JavaScript and IE
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| Total Hit (767) |
ASP.NET web forms provide a new programming model that eases many development tasks. However, there is misconception amongst many programmers that one should only use the server side model. In fact, most of the books available today give emphasis on server side programming. This is natural as any bo
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Setting Initial Focus in Web Form
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| Total Hit (883) |
Many beginners feel that ASP.NET and client side scripts can not be used together. If used cleverly they can go hand in hand to give great user experience. The above task of setting initial focus can be easily solved by JavaScript. We can certainly write the entire javascript block at design time in
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Displaying Images from SQL Server database in ASP.NET DataGrid
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| Total Hit (785) |
ASP.NET DataGrid web control can be bound quickly with any database table like SQL server. For most of the data types all you need to do is to add a bound column and set its datafield property to the column name from the table. However, displaying image data type i.e. binary data is not that easy. I
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Using XML Web Control
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| Total Hit (771) |
Now a days use of XML is increasing quickly. Many times data that you want to display can be stored in XML files rather than statically putting it in HTML pages. Such XML data can be transformed to HTML by applying XSL style sheet to it. In traditional ASP, we used XSL Transform objects to achieve t
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Creating DataGrid Templated Columns Dynamically - Part I
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| Total Hit (474) |
Few months back I wrote article on how to create DataGrid programatically. The article explained how to created a DataGrid with bound columns on the fly. Many readers asked whether we can do similar thing with templated columns. This two part article explains just that. There are actually two ways t
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HOW TO: Close Browser Window From Button Web Control
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| Total Hit (799) |
Generally we want to perform tasks like closing browser window from client side JavaScript itself. However, there might be cases when we should perform some another processing - may be logging or usage tracking - when user explicitly closes the application. This How To will tell you how to code serv
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Using Forms Authentication with Web Services
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| Total Hit (744) |
ASP.NET Forms authentication is one of the most flexible way to authenticating users. Typically under such scheme you will have user ids and passwords in some database. You will then present a form to the user that accepts the credentials. Then at server side you check whether the credentials are va
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Windows Authentication with Web Services
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| Total Hit (749) |
You can enable windows authentication for your web applications using web.config file. You need to set authentication mode to Windows in the <authentication> section. Additionally you need to set <authorization> section to deny anonymous access. Once you set these parameters in the web.config file t
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