Changing Sharepoint Web part to Sandbox solution

Question

Attempting to migrate a web part solution from farm solution to sandbox solution. The steps I have seen online outline changing a property at the project level which is a boolean called 'Sandbox Solution'. However I do not see this option when I view the properties of the project. Does anyone have and ideas on how to migrate a solution which contains multiple web parts from a farm solution to sandbox?

Answer 1

I am afraid this can't be done. When a farm solution is created and deployed it loads extra controls into the solution that allows the solution to easily access data outside of its container. An example is the user control. This control is not allowed in a Sandbox solution as it allows access to the SharePoint root. Just changing that option isn't going to revert that option because the entire solution is geared around it even if you don't use it. It will be deployed. I found the blog post you are talking about or one similar to it and have never seen that work. This is why you define your project type at the beginning because Visual Studio applies the different controls depending on your selection. Removing the sandbox and recompiling will not work.

On another note, you can however convert a sandbox solution to a farm solution. This is because you are moving from stronger security to "less"