Non-deprecated code for detecting whether a SharePoint User has a specific Permission Level

In our application, we have some forms which need to show some data specifically if the current user has a specific permission level. These users belong to an SPGroup which includes users who should not see this data, so in this particular case I cannot filter based off of group membership.

My current solution has been to use web.CurrentUser.Roles and use a simple check on whether it contains a permission level of the correct name. Roles is of the deprecated SPRole class, so I am bombarded with warning messages despite the fact it technically works. It suggests that I use SPRoleAssignment or SPRoleDefinition (the recommendation seems arbitrary since some lines recommend one while others recommend the other even though it is being used for the same thing).

However, I cannot seem to find any method to directly retrieve an SPRoleAssignment or SPRoleDefinition object from an SPUser or SPPrincipal object, nor can I retrieve either object corresponding specifically to the current user of the SPWeb object.

How can I update these methods to use non-deprecated code? I've found other cases of determining user permissions, but I haven't found one that will work from a starting point of the current web or 开发者_开发百科the current user. It's not urgent, but it certainly is helpful to avoid having to sift through all of those warnings just to reach the more important warnings.

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On the actual object, e.g. and SPList, you can call the DoesUserHavePermission method, e.g.

someList.DoesUserHavePermissions(SPBasePermissions.ViewUsageData);