code format

src/Yavsc/Hubs/ChatHub.cs

@@ -129,7 +129,8 @@ namespace Yavsc
         public override Task OnDisconnected(bool stopCalled)
         {
             string userName = Context.User?.Identity.Name;
-            if (userName!=null) {
+            if (userName != null)
+            {
                 var user = _dbContext.Users.FirstOrDefault(u => u.UserName == userName);
                 var userId = user.Id;
                 Clients.Group(Constants.HubGroupFollowingPrefix + userId).notifyuser(NotificationTypes.DisConnected, userName, null);
@@ -343,7 +344,11 @@ namespace Yavsc
         [Authorize]
         public void SendPV(string userName, string message)
         {
-            if (string.IsNullOrWhiteSpace(userName)) return;
+            if (string.IsNullOrWhiteSpace(userName))
+            {
+                Clients.Caller.notifyUser(NotificationTypes.Error, "none!", "specify an user.");
+                return;
+            }
 
             if (userName[0] != '?')
                 if (!Context.User.IsInRole(Constants.AdminGroupName))