SharePoint 2103 Check user permission on List

I. Requirements: Check user's permission to SharePoint list

The code is as follows:

1    Private Static stringGetlistpermission (SPList list,stringloginName)2         {3             stringPerstr =string. Empty;4Spsecurity.runwithelevatedprivileges (() =5             {6                 Try7                 {8SPUser user =list. Parentweb.users[loginname];9SPRoleAssignment roleassignment =list. Roleassignments.getassignmentbyprincipal (user);TenSproledefinitionbindingcollection Defcoll =roleassignment.roledefinitionbindings; One                     foreach(Sproledefinition roledefinchdefcoll) A                     { -Perstr + = Roledef.name +";"; -                     } the                 } -                 Catch(Exception) -                 { -Logger. Debug ("Get user permission by list. Getusereffectivepermissioninfo method, list title: {0}, LoginName: {1}.", List. Title, loginName); +                     Try -                     { +Sppermissioninfo Permissioninfo =list. Getusereffectivepermissioninfo (loginName); A                         varRoleassignments =permissioninfo.roleassignments; at                         foreach(SPRoleAssignment roleassignmentinchroleassignments) -                         { -Sproledefinitionbindingcollection Roledefcoll =roleassignment.roledefinitionbindings; -                             foreach(Sproledefinition roledefinchroledefcoll) -                             { -Perstr + = Roledef.name +";"; in                             } -                         } to                     } +                     Catch(Exception ex) -                     { theLogger. Error ("An error occurred while getting permission by list. Getusereffectivepermissioninfo method, list title: {0}, LoginName: {1}, exception; {2}.", * list. Title, LoginName, ex. ToString ()); $                     }Panax Notoginseng                 } -             }); the             returnPerstr; +}

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Note: The code in catch is check, when user is a member in AD group, but does not exist in the Web userinformation list alone, if you get the user directly SPRoleAssignment, the "Index is out of range" is thrown, so the user can

List. Getusereffectivepermissioninfo (LoginName); To get Sppermissioninfo, and then get the user's sproledefinition, some readers will ask, why not directly from the catch method, so whether the user is only in ad group will not throw an exception

can be correctly obtained to sproledefinition, in fact, is possible, the reason for this is the efficiency problem.

Second, demand: Set permission to List

The code is as follows:

1 Private Static voidSetlibpermission (SPList list,BOOLisread)2         {3             Try4             {5Spsecurity.runwithelevatedprivileges (() =6                 {7                     BOOLHasunique =list. hasuniqueroleassignments;8List. Parentweb.allowunsafeupdates =true;9                     if(!hasunique)Ten                     { OneList. Breakroleinheritance (false); A list. Update (); -                     } -                        Try the                         { -SPUser user =list. Parentweb.ensureuser (Userinfo.key); -Sproledefinitioncollection Objdeficoll =list. parentweb.roledefinitions; -SPRoleAssignment objroleassign =Newsproleassignment (user); +Sproledefinition roledefination =NULL; -                             if(isread) +                             { ARoledefination =Objdeficoll.getbytype (sproletype.reader); at                             } -                             Else -                             { -Roledefination =Objdeficoll.getbytype (sproletype.contributor); -                             } - ObjRoleAssign.RoleDefinitionBindings.Add (roledefination); in list. Roleassignments.add (objroleassign); -                         } to                         Catch(Exception ex) +                         { -                             the                         } * list. Update (); $List. Parentweb.allowunsafeupdates =false;Panax Notoginseng                 }); -  the             } +             Catch(Exception ex) A             { the                 +             } -}

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Note: To assign permissions to the list, you need to break the inheritance, depending on the actual needs

The Userinfo.key in the code is LoginName

List. Parentweb.ensureuser (Userinfo.key); Saves the user to the user information list

SharePoint 2103 Check user permission on List