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Index 1. Introduction 2. HandleErrorAttribute 3. Limitations of HandleError 4. HandleError vs Application_Error 5. Extending HandleError 6. Returning views from Application_Error 7. ELMAH 8. Summary Introduction Exception handling is a serious matter in any application, whether it’s web or desktop. Implementing a proper exception handling is important in any application. In most cases once we catch the exception we have to log the exception details to database or text file and show a friendly message to the user. In ASP.NET applications, error handling is done mostly in two ways: at…

Razor is a great way to create views with ASP.NET MVC. One feature I use quite often are custom helpers. Instead of duplicating the same few lines of markup I simply create a reusable helper to generate HTML. For example, you could create a helper to do something simple like render out a series of values… @helper tabs(params Tab[] tabs) {<ul> @foreach(var tab in tabs) { <li><a href=”@tab.Url” >@tab.Text</a></li> }</ul>} Then use the helper by providing the parameters it needs… @tabs( new Tab { Text = “Google.com”, Url = “https://google.com”…

REST stands for Representational State Transfer. The term was introduced by Roy Fielding in his doctorial dissertation. REST is an architectural style for designing networked applications. It is an alternate to using complex mechanisms like COBRA, RPC, and SOAP to connect between client and server. REST makes communication between remote computers easy by using the simple HTTP protocol which support for CRUD (Create, Read, Update, and Delete) operations on the server. In a way, our World Wide Web is also based on the REST architecture. In a nutshell, REST is…

What is the JavaScript Equivalent of PHP print_r() function? In other words, how you can “print” a javascript object in a way that’s readable by humans? Code You could use JSON.stringify, as following: The HTML part Let’s create two links for demo: <p><a id=”print_demo” href=”javascript:void(0);”>Print object</a></p><p><a id=”pretty_print_demo” href=”javascript:void(0);”>Pretty Print object</a> The JAVASCRIPT part Remark: I use jQuery to handle events, but you can use plain javascript (if you prefer). <script type=”text/javascript”> $(function() { // create an object var person = new Object(); person.firstname = “John”; person.lastname = “Doe”; person.age =…

Browser (and browser version) detection is an “all time classic” development requirement. jQuery.browser WAS an excellent solution, but it was removed in jQuery 1.9. Actually, it would be better to try to detect a browser feature instead of browser name itself, where possible. An ideal solution for this is Modernizr (a JavaScript library that detects HTML5 and CSS3 features in the user’s browser). But, if you still need to detect browser and browser version (using javascript), I suggest the following solutions (among many others): Bowser – A Browser detector and…

In this tip we will take a look at the step to follow to enable or disable XP_CMDSHELL using SP_CONFIGURE system stored procedure. In order to use XP_CMDSHELL you need to be a system administrator. Read the following article which explains how to allow non-administrators to use XP_CMDSHELL. Error Message Received when XP_CMDSHELL is disabled You would end up getting the below mentioned error message when XP_CMDSHELL is disabled. Msg 15281, Level 16, State 1, Procedure xp_cmdshell, Line 1 SQL Server blocked access to procedure ‘sys.xp_cmdshell’ of component ‘xp_cmdshell’ because…

It is always considered as a best practice to disable XP_CMDSHELL when not in use. A database administrator can disable XP_CMDSHELL using SP_CONFIGURE system stored procedure. To disable XP_CMDSHELL execute the below mentioned script. Use Master GO EXEC master.dbo.sp_configure ‘xp_cmdshell’, 0 RECONFIGURE WITH OVERRIDE GO EXEC master.dbo.sp_configure ‘show advanced options’, 0 RECONFIGURE WITH OVERRIDE GO