Why am I getting “Unable to load DLL 'sqlite3'” in my WPF app?

Question

I added what I thought were the necessary SQLite (and sqlite-net) packages to my app. On running it, though, I get an exception:

System.DllNotFoundException was u

Answer 1

I had the same problem on a windows store app and i solved it by following this tutorial : http://www.c-sharpcorner.com/UploadFile/d351ba/working-with-sqlite-in-windows-store-apps/

No need to download manually the dll. The important step is the fifth :

5. Add references to the project.

Right-click on the References to the project under solution, select Add References. This opens up the Reference Manager of the project.

In the Reference Manager click on Windows Version. My application targets Windows 8.1 and therefore I have selected “Windows 8.1”. Select Extensions from the list as shown in the preceding screen shot. Now you will get the list of SDKs applicable to your project. As could be seen in the screen, SQLite for Windows Runtime (Windows 8.1) is available in the list post installation of SQLite from NuGet Package Installer.

Now check/tick the two options Microsoft Visual C++ 2013 Runtime Package for Windows 8.1 and SQLite for Windows Runtime (Windows 8.1) as shown in the screen shot. Then click “Ok”.

Check whether or not the references are added. You can see references are added but it is showing an exclamatory mark on these added references. If you build the application now you will get some warning messages along with the error messages in all certainty and the build fails with some messages as shown below. This is because the SQLite we have installed will not support the “Any CPU” processor architecture.

Now change the target platform from “Any CPU” to your CPU Architecture. In my case, the CPU Architecture is x64. The procedure to check your CPU architecture is specified below.

Not sure if this work for WPF app, but it worked for me on Windows store app. Click the link above for details and screenshots.

Hope this will help some people ;-)