Csom Using Roleassignment

In SharePoint, users have the option to share a document or a folder with another user with either Read or Edit permissions. So you can have a document or may be a folder that you have shared with a person, or many person, or even a group. So now the endevaour is to get a list of all the users with whom a given document is shared with their corresponding permission levels.

To do this, we’re take the help of Role Assignment class.
SharePoint stores this information in the ListItem’s RoleAssignments property. So have a look at the following code:

ClientContext ctx = new ClientContext(targetURL); ctx.Credentials = new SharePointOnlineCredentials(userName, passWord); ctx.Load(ctx.Web); SP.ListCollection listCol = web.Lists; ctx.Load(listCol); SP.List list = listCollection.GetByTitle("ListTitle"); SP.CamlQuery camlQuery = new SP.CamlQuery(); camlQuery.ViewXml = ""; SP.ListItemCollection listItemCollection = list.GetItems(camlQuery); ctx.Load(listItemCollection); //Execute Query ctx.ExecuteQuery();   SP.ListItem listItem = listItemCollection.FirstOrDefault(t => t.DisplayName == "WordFileName"); ctx.Load(listItem,     li => li.HasUniqueRoleAssignments,     li => li.RoleAssignments.Include(         p => p.Member,         p => p.RoleDefinitionBindings.Include(             s => s.Name))); ctx.ExecuteQuery(); if (listItem.HasUniqueRoleAssignments) {     //Get all the RoleAssignments for this document     foreach (RoleAssignment rAssignment in listItem.RoleAssignments)     {         //A single RA can have multiple bindings         foreach (RoleDefinition rDef in rAssignment.RoleDefinitionBindings)         {             Console.WriteLine(String.Concat("Role assigned to the member, ", rAssignment.Member.LoginName, " is ", rDef.Name));         }     } } else     Console.WriteLine("The current ListItem has no unique roles assigned to it.");

Here, what I am doing is that for a given SharePoint site, I am connecting to a Document Library named, “ListTitle”. Then I am trying to get an item, “WordFileName”  from that list as this item has got some unique roles.

The important things to note down here is:

  1. A single item can have multiple Role Assignments i.e., different types of roles can be assigned to it. Say, a given user, A, might be assigned with “Edit” permission while another user, B, can have only “Read” permissions. Each of this variations will come down as a single Role Assignment(RA).
  2. A single Role Assignment can have multiple bindings.

Following are the roles defined for the user, that you can get for an item:

  • Full Control
  • Design
  • Edit
  • Contribute
  • Read
  • Limited Access
  • View Only
  • Records Center Web Service Submitters

Similarly, here’s the link to the blog where I have described how, through code, we can share Office365 file, https://realmpksharepoint.wordpress.com/2014/08/04/share-a-sharepoint-file-with-different-office365-users-using-client-object-model-c/

That’s it.

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            // get the visitors group

            Group group=ctx.Web.AssociatedVisitorGroup;

            ctx.Load(group);

            ctx.ExecuteQuery();

            stringuserGroup=group.Title;

            

 

            // Override default permission inheritance

            UserTutorialCompletion.BreakRoleInheritance(true,false);

 

            // Creation role definition

            varroleCreationInfo=new  RoleDefinitionCreationInformation();

            BasePermissions perms=newBasePermissions();

            perms.Set(PermissionKind.AddListItems);

            roleCreationInfo.BasePermissions=perms;

            roleCreationInfo.Description="This Role is just for Create Items";

            roleCreationInfo.Name="Just Create Items";

 

            // Get principal for usergroup and the contributor role

            varprincipal=ResolvePrincipal(ctx,userGroup);

 

            //var role = GetRole(ctx, RoleType.Contributor);

            // Add the RoleCreationDefinition

            varrole=AddRole(ctx,roleCreationInfo);

 

            // Add the role to the collection.

            varcollRdb=newRoleDefinitionBindingCollection(ctx){role};

            varcollRoleAssign=UserTutorialCompletion.RoleAssignments;

 

            collRoleAssign.Add(principal,collRdb);

            ctx.ExecuteQuery();

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