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Adding class libraries to an ASP.NET 5 web application
When adding a class library to an ASP.NET 5 application you might get an error like “The following projects are not supported as references: – The project ClassLibrary1 has a target framework that is...
View ArticleASP.NET 5 Web Api Controller with multiple get methods
I have two other posts on multiple GET methods, both for Web Api 2, the first shows how to use routes like ‘http://…/api/values/geta’ and the second shows ‘http://…/api/values/22’ or...
View ArticleThe type ‘xxxx’ is defined in an assembly that is not referenced....
If you recognize the error from the title of this post, you can jump to the solution. The problem I have a ASP.NET 5 solution with two projects, a web application project and a class library project....
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How to fix ‘No database providers are configured’ when scaffolding a...
If got this error when trying to scaffold a new controller (MVC and Web Api) for an ASP.NET 5 web app using Visual Studio 2015. There was an error running the selected code generator: 'No database...
View ArticleParameterized SQL WHERE IN clause c#
If you are using some legacy SQL in C# you’ll occasionally need to write a WHERE IN. Yon don’t want to end up writing something like the below, either directly or through some sort of loop. string...
View ArticleFiltering a Dictionary by value with a List as the value
Filtering out entries in a dictionary is not too difficult when the key and value are simple. For example if you had – IDictionary oneToFourDictionary = new Dictionary {{ "one", 1 }, { "two", 2 }, {...
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Why you should use IDictionary, IList, etc
Summary When returning objects from a method try to use IList, IDictionary, etc instead of List and Dictionary. This is especially important when the method is inside a class library which you...
View ArticleCustomizing a specific string inside a class using AutoFixture
Full source code. I’ve been using AutoFixture for a while with my unit tests. It creates objects with prefilled data, saving me the hassle of manually constructing them. Basic usage If you want a...
View ArticleEntity Framework, checking the connection string of your context
Sometimes when using Entity Framework I want to verify that I’m connected to the database I think I’m connected to. Here’s how to check in Entity Framework 5, Entity Framework 6 and Entity Framework...
View ArticleWeb API 2 and ninject, how to make them work together
Full source code to download. I’ve been using ninject for a few years, but every time I use it with Web Api I hit some problem and they usually stem from not including the right nuget packages, not...
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Getting Web API Exception Details from a HttpResponseMessage
The Problem It’s hard to get the details of an exception from a Web Api response when calling Web Api from a C# program. (Skip to the solution if you don’t care about the background), it even handles...
View ArticleEntity Framework Core and calling a stored procedure
Download full source code here. I thought this would be easy, there is a method called ExecuteSqlCommand which takes the stored proc name and an array of parameters. I wanted to pass in two parameters...
View ArticleValue cannot be null. Parameter name: constructor
Using Entity Framework I occasionally get the following error when reading from the database – exceptionMessage=Value cannot be null. Parameter name: constructor My Person class looked like this –...
View ArticleWeb API 2 Controller with multiple get methods
I have two other posts on multiple GET methods, one for ASP.NET 5 Web Api, and another for Web Api 2. It seems that every version of Web API changes how it handles default routes or route prefixes or...
View ArticleFluent Validation with Web Api 2
Full source code here. I wrote blog post in 2015 on using the Fluent Validation NuGet package for complex validation needs. In the post the validator checked that a create person request had at least...
View ArticleDownloading an in-memory file using Web Api 2
Download full source code At first you think it’s going to be easy to download a file from Web Api, but as I discovered, it was not. In my case I wanted to load data from the database, perform some...
View ArticleWeb API 2 Controller with multiple GET methods – part 2
I have two other posts on multiple GET methods, one for ASP.NET 5 Web Api, and another for Web Api 2. Download full source code. A few months ago I wrote a post explaining how to create a controller...
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Web Api 2 Without MVC
Download full source code. When building a Web Api 2 application there is much unneeded MVC baggage that comes along with it. To start with all the css, html and javascript can go, then most of the...
View ArticleA simple Polly example with WebApi 2
Download full source code. If you are calling APIs and you haven’t heard about The Polly Project, you should check it out. It helps take care of many common problems like unreliable connections,...
View ArticleReusing Polly Policies with Dependency Injection
Download full source code. In my previous post “A simple Polly example with WebApi 2” I showed how to make a request to an unreliable endpoint protected by a Polly retry policy. For more on Polly see...
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