public void AsignarPermisos(Web web, ListItem item, Principal grupo, RoleType roleType)
{
ClientContext clientContext = this.context;
clientContext.Load(item, it => it.HasUniqueRoleAssignments);
clientContext.ExecuteQuery();
if (!item.HasUniqueRoleAssignments)
{
item.BreakRoleInheritance(false, false);
}
clientContext.Load(web);
clientContext.ExecuteQuery();
UserCollection users = web.SiteUsers;
RoleDefinitionBindingCollection collRoleDefinitionBinding = new RoleDefinitionBindingCollection(web.Context);
RoleDefinition roleDefinition = web.RoleDefinitions.GetByType(roleType);
collRoleDefinitionBinding.Add(roleDefinition);
item.RoleAssignments.Add(grupo, collRoleDefinitionBinding);
clientContext.Load(item, it => it.RoleAssignments);
clientContext.Load(users);
clientContext.ExecuteQuery();
bool existsysuser = false;
foreach (RoleAssignment itemfe in item.RoleAssignments)
{
clientContext.Load(itemfe, it => it.Member);
clientContext.Load(itemfe.Member, itm => itm.LoginName);
clientContext.ExecuteQuery();
if (itemfe.Member.LoginName.Equals("SHAREPOINT\\system"))
{
existsysuser = true;
}
}
if (existsysuser)
{
Principal sysuser = users.GetByLoginName("SHAREPOINT\\system");
RoleAssignment ra = item.RoleAssignments.GetByPrincipal(sysuser);
ra.DeleteObject();
}
}