Online editors for developers

The list below has links to online IDE for different languages. All you need is just put your code here and run. Please, add your suggestions to add new resources in comments? Free online IDEs Coding Ground – Edit, compile, execute and share your projects, 100% cloud. The all-out list of supported languages. (Quick links to editors: C#, […]

Programming Tests

  • March 15, 2015
  • Tools

The list below has all web sites which I found with free test plans for programming tests. Please, suggest your web site in comments if you cannot find someone. Free tests for developers TestDome – a bunch of tests for different languages and subjects HackerRank – excerpt from the website: “Compete in challenges and codesprints and see how […]

Pitfalls of Building Ajax Grid with ASP.NET MVC and jQuery/JavaScript

This article is about pitfalls which should be considered when you’re implementing an Ajax grid with jQuery and ASP.NET MVC. The sample in the article can be used as a starting point to more complicated version of any grid since it provides a complete set of required features: create, edit, delete, filtering, sorting and pagination. […]

Passing AntiForgeryToken to every POST request

The best practice is that all POST request has AntiForgeryToken to prevent XSS attack. If you don’t know what it is, please, read materials in the bottom of the article. From MVC 3.5 there is a special attribute which can be applied to controller actions ValidateAntiForgeryTokenAttribute. It works in pair with HtmlHelper method Html.AntiForgeryToken(). The value […]

Truncate log file of a MSSQL database

From time to time it’s required to clean up log file, but Managment Studio does not offer straightforward command to do that. This script will help in cleaning up.

Issues with serializing JSON response from REST

You might get the following message when trying to serialize a JSON response from a REST service with DataContractJsonSerializer :

If your message looks similar to this example you should check your data contract classes. It’s possible that some property has an invalid type association. For example, the REST service could return complex type Person with […]

Not obvious issues in configuration of EF Code First

This post describes my own issues which I bumped into while setting up EF Code First. This is not a complete list of all possible issues and any input would be appreciated. Connection String In web project it may be not obvious why is database not created. The error message may tell about the null reference […]

MvcSiteMapProvider localization with Resources

The links to descriptions of the approach. It is strongly required to use App_GlobalResources and place resource files with localized strings in it.

Error: DbArithmeticExpression arguments must have a numeric common type.

From time to time you need to filter data by difference between two dates. For instance, you wanna take a difference between date from a record and Today.

Error: Unable to determine the principal end of an association between the types

You may get this error if you have entities related to itself. For example, you have a tree hierarchy.