Tagged articles - C#

Found 175 articles tagged with C#

Restrict image and CSS hotlinking of your ASP.NET website
Blocking hotlinking with IIS Url Rewrite
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I did not rely how important to restrict hot-linking until one day my friend came to me and told me that he has to pay additional money for the bandwidth on his website. He was surprised that he reached bandwidth quota limit. It was weird, but after some logging of requests coming to a website we realized that most of the requests were initiated from some other website...read more
Windows Scheduled Task vs Windows Service
Points to consider whether to use scheduled task or windows service
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From time to time you have a need to implement some maintainance opration for your application server. Whether it is just a simple temporary file deleting pr something more complicated. Two most common ways to do this are either using ...read more
Generating HTML structure string in C#
Clean and proper way to generate html string in C#
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String hardcoding it the worst way to generate your HTML. It makes code non-maintainable and hard to read. Lately in June I wrote an article how to generate HTML string without hard coding the string and using concatenation or string format...read more
Adding extra info to an image file
Adding additional info to an image using C#
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I was always wondering where are additional properties for the image stored. Simply, when you click right click on the image in Windows and go to properties, in tab Details there are some more info than just file size and image dimensions. ...read more
Using Lazy<T> in C#
Scenarios when lazy initialization is suitable for using
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Although Lazy keyword and functionality was introduced in .net framework 4.0, not many people are using. It is not something that was not possible to be done later, but now it is available only oin one line. Basicaly what Lazy keyword enables is to create an instance only when it is invoked for the first time. ...read more
The server committed a protocol violation. Section=ResponseStatusLine
Switching off header validation in .NET
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Recently I was adding GitHub project section to my blog when I run into the following exception "The server committed a protocol violation. Section=ResponseStatusLine" After some time of Google-ing I found few solutions, but the most simplest one was actually the best one...read more
Maintaining same session with separate web requests from C# code
Create separate web requests with the same server session
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Recently I started a small project for image optimization which relies on public image optimization services available online. For now it supports Yahoo SmushIt and Compressor.io services, but it will be extended over the time. Project is open-source and hosted at GitHub https://github.com/dejanstojanovic/ImageOptimization. ...read more
Getting social network access token from C# backend
Acquire Facebook or Google+ access token from C# code
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Most popular social networks such is Facebook and Google+ are providing authentication for web applications with fancy javascript pop-ups. However this approach might not work in all browsers and most likely not on every device. For example this approach does not work on iPhone or iPad because browser itself does not allow pop-ups...read more
Honeypot implementation in ASP.NET MVC
Honeypot bot detection implementation in MVC
 
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You can find a bunch of articles on internet about HONEYPOT implementation on web pages, but in short it is a replacement for CAPTCHA anti-bot security. In CAPTCHA scenario, user needs to enter hardly recognizable characters in order to prove that he is not a bot trying to submit data...read more
Change Request.Form collection on the fly
How to modify Request.Form collection
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Data from form are sent to backend (whether code behing of page in WebForms or Controller Action in MVC) in Request.Form property. It is oragnized as collection of name and value and can be easily access by name. In some extreme cases, you need to make some modifications to posted form data. ...read more
Access auto property backing field with reflection
Access property fields of auto property in C#
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Using reflection you can easily access any property, filed, methods, pretty much anything of any type in .NET. Reflection is never the most elegant way to do something, but sometime you just have to do it. In older versions of C#, to declare a simple property in a class you would have to declare a private field which will be exposed by the property outside the class ...read more
Obtaining access token from Google+ API in non SPA web application
How to get access token in C# backend from Google+ API
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Recently I was trying to use Google+ OAuth api for authenticating with Google+ and fetch some user basic info such as name and email. ...read more
Same page language switching in Umbraco
Land on the same page in different language in Umbraco using Relations
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When we build multi-language website, we usually create two root elements which represent different language websites. To switch the language you just need to add a link to other root elements which represent other languages of the website. With this approach, when you switch language you will end up at homepage of the language regardless which page you were viewing. ...read more
Bypass SSL certificate validation
A workaround quick solution when your SSL certificate expires
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It is a common thing that some of your application functionalities depend on an external HTTPS endpoint. However, renewal of SSL certificate for the external party is out of your control and you have to rely on the third party that certificate will be renewed on time...read more
Filesize to proper display string
Display size of file in the proper maner
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How many times you had to display file size on your web page? Pretty much every time you might have the same issue with recalculating size to KB or MB. I caught myself doing this for so many times over and over, so finally I decided to write a piece of code for that. ...read more

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