Issue #107: Added function PositionCloseAll

Author: vdemydiuk

MtApi5/Mt5CommandType.cs

@@ -250,6 +250,7 @@ internal enum Mt5CommandType
         GlobalVariablesDeleteAll            = 157,
         GlobalVariablesTotal                = 158,
 
-        UnlockTicks                         = 159
+        UnlockTicks                         = 159,
+        PositionCloseAll                    = 160
     }
 }

MtApi5/MtApi5Client.cs

@@ -521,11 +521,20 @@ public string HistoryDealGetString(ulong ticketNumber, ENUM_DEAL_PROPERTY_STRING
         ///<summary>
         ///Close all open positions. 
         ///</summary>
+        [Obsolete("OrderCloseAll is deprecated, please use PositionCloseAll instead.")]
         public bool OrderCloseAll()
         {
             return SendCommand<bool>(Mt5CommandType.OrderCloseAll, null);
         }
 
+        ///<summary>
+        ///Close all open positions. Returns count of closed positions.
+        ///</summary>
+        public int PositionCloseAll()
+        {
+            return SendCommand<int>(Mt5CommandType.PositionCloseAll, null);
+        }
+
         ///<summary>
         ///Closes a position with the specified ticket.
         ///</summary>

TestClients/MtApi5TestClient/MainWindow.xaml

@@ -486,13 +486,15 @@
                         <Grid.RowDefinitions>
                             <RowDefinition Height="Auto"/>
                             <RowDefinition Height="Auto"/>
+                            <RowDefinition Height="Auto"/>
                         </Grid.RowDefinitions>
                         <Button Grid.Row="0" Command="{Binding PositionOpenCommand}" Content="PositionOpen" Margin="2" HorizontalAlignment="Left"/>
                         <StackPanel Grid.Row="1" Orientation="Horizontal" Margin="4">
                             <TextBlock Text="Ticket:" VerticalAlignment="Center"/>
                             <TextBox Text="{Binding PositionTicketValue}" Width="150" Margin="2"/>
                             <Button Command="{Binding PositionCloseCommand}" Content="PositionClose" Margin="2"/>
                         </StackPanel>
+                        <Button Grid.Row="2" Command="{Binding PositionCloseAllCommand}" Content="PositionCloseAll" Margin="2" HorizontalAlignment="Left"/>
                     </Grid>
                 </TabItem>
 

TestClients/MtApi5TestClient/ViewModel.cs

@@ -67,6 +67,7 @@ public class ViewModel : INotifyPropertyChanged
 
         public DelegateCommand PositionOpenCommand { get; private set; }
         public DelegateCommand PositionCloseCommand { get; private set; }
+        public DelegateCommand PositionCloseAllCommand { get; private set; }
 
         public DelegateCommand GetLastErrorCommand { get; private set; }
         public DelegateCommand ResetLastErrorCommand { get; private set; }
@@ -375,6 +376,7 @@ private void InitCommands()
 
             PositionOpenCommand = new DelegateCommand(ExecutePositionOpen);
             PositionCloseCommand = new DelegateCommand(ExecutePositionClose);
+            PositionCloseAllCommand = new DelegateCommand(ExecutePositionCloseAll);
 
             PrintCommand = new DelegateCommand(ExecutePrint);
             AlertCommand = new DelegateCommand(ExecuteAlert);
@@ -1126,6 +1128,12 @@ private async void ExecutePositionClose(object obj)
             AddLog($"PositionClose: ticket {ticket} retVal = {retVal}, result = {tradeResult}");
         }
 
+        private async void ExecutePositionCloseAll(object obj)
+        {
+            var retVal = await Execute(() => _mtApiClient.PositionCloseAll());
+            AddLog($"PositionCloseAll: count = {retVal}");
+        }
+
         private async void ExecutePrint(object obj)
         {
             var message = MessageText;

mq5/MtApi5.ex5

@@ -791,6 +791,9 @@ int executeCommand()
    case 159: //UnlockTiks
       Execute_UnlockTicks();
    break;
+   case 160: //PositionCloseAll
+      Execute_PositionCloseAll();
+   break;
    case 204: //TerminalInfoInteger
       Execute_TerminalInfoInteger();
    break;
@@ -6527,6 +6530,17 @@ void Execute_UnlockTicks()
    }
 }
 
+void Execute_PositionCloseAll()
+{
+   int res = PositionCloseAll();
+   
+#ifdef __DEBUG_LOG__
+   PrintFormat("%s: result = %d", __FUNCTION__, res);
+#endif
+
+   SEND_INT_RESPONSE(res)
+}
+
 void Execute_TerminalInfoInteger()
 {
    int propertyId;
@@ -6714,6 +6728,18 @@ bool OrderCloseAll()
    return true;
 }
 
+int PositionCloseAll()
+{
+   CTrade trade;
+   int total = PositionsTotal();
+   int i = total -1;
+   while (i >= 0)
+   {
+      if (trade.PositionClose(PositionGetSymbol(i))) i--;
+   }
+   return total;
+}
+
 //------------ Requests -------------------------------------------------------
 
 string OnRequest(string json)
@@ -7408,10 +7434,6 @@ private:
 
 void SendMtEvent(MtEventTypes eventType, MtEvent* mtEvent)
 {
-#ifdef __DEBUG_LOG__
-   PrintFormat("%s: eventType = %d", __FUNCTION__, eventType);
-#endif 
-
    JSONObject* json = mtEvent.CreateJson();
    if (sendEvent(ExpertHandle, (int)eventType, json.toString(), _error))
    {