Quick Tip

Bundling and Minification in ASP.NET Web Forms Application

ASP.NET has in-built for bundling of multiple resources such as js or css files into one file and then minifiy the files to reduce the number of calls made to the server and total data size downloaded from the server thus reducing the total download time and enhanding application’s performance.  In order to use this in web forms application which target version .NET 4.5 and higher, following steps are required 1. Go to NuGet Package Manager and install Microsoft.AspNet.Web.Optimization and Microsoft.AspNet.Web.Optimization.WebForms packages 2. Check web.config to make sure “webopt” tag prefix is added (once you install Microsoft.AspNet.Web.Optimization.WebForms)

3. Add a class file as following and define the resources you want to bundle

4. Go to Global.asax file and register the bundles

5. In order to use these bundles simply use the statements as following CSS bundle

JS bundle

Read more about this @ Bundling and Minification Adding Bundling[…]

Quick Tip

Block libwww-perl attack in ASP.NET Application hosted in IIS

Libwww-perl (LWP) is a WWW client/server library for perl which can be used by hackers, spammers or automated bots to attack a website to steal information so we need to apply security to our web application to eliminate many simpler attacks on the website. In order to fix this issue in an ASP.NET web application we can use the following code. Add the code in Application_BeginRequest method of Global.asax file in your web application

Another option is to disallow Libwww-perl user agent in robots.txt


SEO Tip: Set Preferred URL in ASP.NET Application

Search engines treat website URL with and without “www” differently. Though both URLs point to the same destination, it’s important to pick one and set as your preferred URL so that search engines don’t two URLs as duplicate content. Websites use 301 redirect for this. The example code to redirect non-www URL to www URL in an ASP.NET application would be as following. Add following code snippet in Application_BeginRequest method of your Global.asax. Replace URL (somewebsite.com) with your website URL in the code and you are all set.

If you want to do the opposite and direct www URL to non-www URL simply change the code as following

It does not make a different to search engines which one (www or non-ww) do you prefer but you do need to pick one of the two URLs as your preferred URL to improve SEO ranking of your site.

Add SEO Friendly URL’s to ASP.NET Application

It’s very important for a web site to create SEO friendly URL’s and remove page extensions such as .aspx. When search engines look at a site, the first thing they analyze is the page URL which help them ascertain what the page content is about. In ASP.NET application Routes can be used for this which are URL patterns used for processing requests and can be used to construct URLs dynamically. The Global.asax file is a special file that contains event handlers for ASP.NET application lifecycle events. The route table is created during the Application Start event in Global.asax. In order to do so add Global Application Class (Global.asax) to your ASP.NET Web Application if it is not created yet. The following example shows how to add a route.

The marked line adds a route for default landing page of the web site so a website URL such as http://somewebsite.com/Default.aspx will be changed to http://somewebsite.com. Similarly http://somewebsite.com/SomePage.aspx[…]

Publish an ASP.NET website without roslyn folder

If you create a ASP.ENT website using Visual Studio 2015 or higher and .NET Framework 4.5.2, it by default uses Roslyn which is a set of open-source compilers and code analysis APIs for C# and Visual Basic. Publishing this would also include “roslyn” folder in bin directory containing a bunch of libraries and exe files which creates issues if you are using a shared hosting service as normally shared hosting do not run under full trust. We can simply remove this by going to Tools -> NuGet Package Manager -> Manager NuGet Packages for Solution -> Uninstall following packages Microsoft.CodeDom.Providers.DotNetCompilerPlatform Microsoft.Net.Compilers Check web.config and make sure the following section was removed by the NuGet package uninstall. If it did not get removed for any reason, then clean it up manually

Now publish your website and you won’t see roslyn folder inside bin directory anymore.

Quick Tip

Convert C# Object to JSON and create object from JSON string

Json.Net is the preferred way to go about it because of performance gain it gets compared to JavascriptSerializer. Download and install Newtonsoft.Json using Nuget Now in order to create Json for an object simply use SerializeObject method as following

In order to convert Json to the object use DeserializeObject method as following


Commenting Etiquettes While You are on Web !!

Now a days commenting on posts or blogs is not just what people do out of their interests only but also it is really important to be an active commenter on the social media to mark your presence known and maintain overall awareness about the updates. It helps in building links with others, building a community and sharing your views. Comments also reveal the engagement of your content. While sharing your views anywhere be it on a blog or some social networking post, you have to make sure that your comments are expressed in a good way. There are certain things to be taken care of before you comment. Here they are: • Make Valuable Comments: Make sure to never comment without proper knowledge about the subject and reading of the content. Comments should not be done just to make noise but to add on to the information. You can add a story related to a post[…]

Windows 10 App :Host Defined Policy: Inline Script. Resource will be blocked.

I recently ported one of my java script projects to Windows store app and got the error as following CSP14321: Resource violated directive ‘script-src ms-appx: ‘unsafe-eval’ blob:’ in Host Defined Policy: inline script, in ms-appx://13bdc914-5111-4c95-a5e6-82029c5105ec/index.html at line 21 column 12. Resource will be blocked. If you have something like the following, it won’t work

Since I was using jQuery in the project, I simply used jQuery to bind click event to the element

and Voila, everything works but I had many pages which had this reference and I had to make this change to all pages. After some research I found that there is an alternate way which is much faster to change. By default ms-appx:/// protocol is used in store apps to fetch the content. For web apps specify a specific protocal ms-appx-web which is then used for the app. This can be done by changing start page from index.html to ms-appx-web:///index.html[…]

Error: An invalid APK was received. Not a signed jar file.

When I tried to upload APK file to Aptoide store which was built using cordova and signed for the release version, I got this error An invalid APK was received, does not seem to have all files correctly signed. Please verify apk signature and try again. Signature error: Not a signed jar file The same APK was fine when uploaded on Google Play Store. In order to fix this problem I had to create an unsigned release version of the APK using cordova and then sign it using jarsigner utility. In order to create unsigned release version of the APK, following command can be used

Jarsigner utility comes with java sdk and can be found @ your JDK bin folder (for ex, C:\Program Files\Java\jdk1.8.0_131\bin). The command which can be used to sign the APK is as following

Replace android.keystore with your keystore file name, password with the keystore password, and[…]

URL Rewrite SEO in IIS

Since the advent of search engines URL rewriting has become mandatory. It makes URLs look nicer and clearer in terms of what content to expect at the given URL. Recently I uploaded few static HTML files to an IIS site. I wanted a nice looking URL without .html extension which was quite straight-forward to achieve in ASP.NET site. You can install URL Rewrite Module in IIS 7 or above versions and a few configuration steps is all that is required to achieve the desired results. Read this article from Microsoft to get in-depth understanding of the steps. Below is the sample web.config entry I had to make to achieve the results

You will need some understanding of the regular expressions to create a matching pattern for your URL (match tag in web.config) and map it to actual resource on the server which is defined in action tag. Here I am simply[…]