updateSubscription and try to re-select the last choice.

v2rayN/v2rayN/Forms/MainForm.cs

@@ -1313,12 +1313,54 @@ namespace v2rayN.Forms
                 RefreshServers();
             }
         }
-
+        /// <summary>
+        /// Reset to the previous selected.
+        /// </summary>
+        private int FindIndexByRemarks(string remarks)
+        {
+            for (int k = 0; k < config.vmess.Count; k++)
+            {
+                VmessItem item = config.vmess[k];
+                if (item.remarks.Equals(remarks))
+                {
+                    return k;
+                }
+            }
+            for (int k = 0; k < config.vmess.Count; k++)
+            {
+                VmessItem item = config.vmess[k];
+                if (item.remarks.Contains(remarks.Substring(0, 2)))
+                {
+                    // 汉字也是占一个, 台湾 CHT [06]
+                    return k;
+                }
+            }
+            return 0;
+        }
         private void tsbSubUpdate_Click(object sender, EventArgs e)
         {
-            UpdateSubscriptionProcess();
+            VmessItem item = config.vmess[config.index];
+            var remarks = item.remarks;
+            var handle = new UpdateHandle();
+            void _updateUIAndReselect(bool success, string msg)
+            {
+                AppendText(false, msg);
+                if (success)
+                {
+                    RefreshServers();
+                }
+                if (handle.updateSubscriptionProcessCompleted)
+                {
+                    // wait for above fxcking async program to complete
+                    int index = FindIndexByRemarks(remarks);
+                    SetDefaultServer(index);
+                    AppendText(false, $"{UIRes.I18N("MsgUpdateSubscriptionEndReslectLast")}");
+                    RefreshServers();
+                    handle.updateSubscriptionProcessCompleted = false;
+                }
+            };
+            handle.UpdateSubscriptionProcess(config, _updateUIAndReselect);
         }
-
         /// <summary>
         /// the subscription update process
         /// </summary>

v2rayN/v2rayN/Handler/UpdateHandle.cs

@@ -14,7 +14,7 @@ namespace v2rayN.Handler
     {
         Action<bool, string> _updateFunc;
         private Config _config;
-
+        public bool updateSubscriptionProcessCompleted = false;
         public event EventHandler<ResultEventArgs> AbsoluteCompleted;
 
         public class ResultEventArgs : EventArgs
@@ -212,6 +212,7 @@ namespace v2rayN.Handler
                         {
                             _updateFunc(false, $"{hashCode}{UIRes.I18N("MsgFailedImportSubscription")}");
                         }
+                        updateSubscriptionProcessCompleted = true;
                         _updateFunc(true, $"{hashCode}{UIRes.I18N("MsgUpdateSubscriptionEnd")}");
                     }
                     else

v2rayN/v2rayN/v2rayN.csproj

@@ -498,6 +498,10 @@ del $(TargetDir)*.xml $(TargetDir)*.so $(TargetDir)*.dylib
 if not "$(ConfigurationName)" == "Debug" del $(TargetDir)*.pdb</PostBuildEvent>
   </PropertyGroup>
   <Import Project="..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets')" />
+  <PropertyGroup>
+    <PreBuildEvent>TASKKILL /F /IM  v2rayN.exe /T
+set errolevel=0</PreBuildEvent>
+  </PropertyGroup>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">