Add SystemInfo to AboutPage

MarketDataLib/Service/MarketDataServiceClient.cs

@@ -61,6 +61,7 @@ namespace MarketData.Service
     {
       return null==baseUri?"":baseUri.ToString();
     }
+
     public bool Ping(String url)
     {
       lock(this)
@@ -98,6 +99,30 @@ namespace MarketData.Service
         }
       }
     }
+
+    public ServiceResult GetSystemInfo()
+    {
+      lock(this)
+      {
+        try
+        {
+          if(!IsNetworkAvailable())return new ServiceResult(false,"No network.");
+          StringBuilder sb = new StringBuilder();
+          sb.Append("/api/Ping/GetSystemInfo");
+          String json = httpClient.GetStringAsync(sb.ToString()).Result;
+          json=ToConformimgJson(json);
+          String accessToken = JsonConvert.DeserializeObject<String>(json);
+          return new ServiceResult(accessToken);
+        }
+        catch (Exception exception)
+        {
+          exceptions.Add(exception);
+          Debug.WriteLine(exception.ToString());
+          return new ServiceResult(false,exception.ToString());
+        }
+      }
+    }
+
     private ServiceResult Login(String user, String password)
     {
       lock(this)