public ActionResult SetNodeRoles(Guid id, string submit, string role, string user)
 {
     if (submit == "添加用户")
     {
         FlowNodeManager.AddUser(id, user);
     }
     else if (submit == "删除用户")
     {
         FlowNodeManager.DeleteUser(id, user);
     }
     else if (submit == "添加角色")
     {
         FlowNodeManager.AddRole(id, role);
     }
     else if (submit == "删除角色")
     {
         FlowNodeManager.DeleteRole(id, role);
     }
     return(RedirectToAction("SetNodeRoles"));
 }
 public ActionResult DeleteRole(Guid id, string role)
 {
     FlowNodeManager.DeleteRole(id, role);
     return(RedirectToAction("SetNodeRoles", new { id = id }));
 }