how to detect the current user's permissions for a web part

Question

In SharePoint 2010, I have custom Web Parts. In the Web Part Gallery, I grant read permissions to certain users to let them add these web parts to a page. Within CreateChildControls, how can I detect if the current user is able to read the current web part?

Basically, I am looking for the equivalent of the DoesUserHavePermissions method (from SPList) for the current web part.

Answer 1

You can use the below code in your CreateChildControls method:

protected override void CreateChildControls()
{   
    using (SPSite spSite = new SPSite("http://sitecollectionurl"))
    {
         using (SPWeb spWeb = spSite.OpenWeb())
         {
            // Get the current user.
            SPUser currentUser = SPContext.Current.Web.CurrentUser;
            // Get the list.
            SPList spList = spWeb.Lists.TryGetList("MyList");
            // Variable to determine permission.

            bool userPermission = spList.DoesUserHavePermissions(currentUser, SPBasePermissions.AddListItems);
            if (userPermission)
            {
                  // Perform operation here.
            }
       }
    }
}