Set Advanced permissions for list programatically in add-in

Question

I have started development in Visual Studio.

I need help on how to programatically set Advanced permissions for a SharePoint list, specifically the "Create items and edit items that were created by the user​​​" setting

Answer 1

Try it as below:

var customList = web.GetListByTitle("Documenten");

// Change the advanced settings
//1— All users have Read access to all items.
//2— Users have Read access only to items that they create.

customList.ReadSecurity = 2;

//1— Write all items.
//2— Write only my items.
//4— Write no items (read-only list).

customList.WriteSecurity = 2;

customList.Update()
context.Load(customList);
context.ExecuteQuery();

Ensure that you have the latest version of CSOM or atleast August 2016 CSOM dll.

SharePoint CSOM version released for SharePoint Online - August 2016