尝试避免某些 System.NullReferenceException

STBBRD · Oct 27, 2024 · 94cf9ac · 94cf9ac
1 parent ec1a804
commit 94cf9ac
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Showing 2 changed files with 33 additions and 10 deletions.
diff --git a/ZongziTEK_Blackboard_Sticker/Pages/InfoBoardPages/WeatherForecastPage.xaml.cs b/ZongziTEK_Blackboard_Sticker/Pages/InfoBoardPages/WeatherForecastPage.xaml.cs
@@ -14,6 +14,7 @@
 using System.Windows.Media.Imaging;
 using System.Windows.Navigation;
 using System.Windows.Shapes;
+using ZongziTEK_Blackboard_Sticker.Helpers;
 using ZongziTEK_Weather_API;
 
 namespace ZongziTEK_Blackboard_Sticker.Pages
@@ -46,7 +47,7 @@ public WeatherForecastPage()
                     {
                         castWeathers = JsonConvert.DeserializeObject<List<CastWeather>>(File.ReadAllText(castWeatherFilePath));
 
-                        if (castWeathers.Count == 0)
+                        if (castWeathers == null || castWeathers.Count == 0)
                         {
                             UpdateCastWeathers();
                         }
@@ -71,14 +72,21 @@ public WeatherForecastPage()
         private void UpdateCastWeathers()
         {
             castWeathers = Weather.GetCastWeathers(MainWindow.Settings.InfoBoard.WeatherCity);
-            File.WriteAllText(castWeatherFilePath, JsonConvert.SerializeObject(castWeathers, Formatting.Indented));
+            try
+            {
+                File.WriteAllText(castWeatherFilePath, JsonConvert.SerializeObject(castWeathers, Formatting.Indented));
+            }
+            catch (Exception ex)
+            {
+                LogHelper.NewLog(ex.Message);
+            }
         }
 
         private bool isTodayRainy = false;
 
         private void ShowCastWeathers()
         {
-            if (castWeathers.Count != 0)
+            if (castWeathers != null && castWeathers.Count != 0)
             {
                 string rainDays = "";
                 int today = (int)DateTime.Now.DayOfWeek;

diff --git a/ZongziTEK_Blackboard_Sticker/Pages/InfoBoardPages/WeatherPage.xaml.cs b/ZongziTEK_Blackboard_Sticker/Pages/InfoBoardPages/WeatherPage.xaml.cs
@@ -15,6 +15,7 @@
 using System.Windows.Navigation;
 using System.Windows.Shapes;
 using System.Windows.Threading;
+using ZongziTEK_Blackboard_Sticker.Helpers;
 using ZongziTEK_Weather_API;
 
 namespace ZongziTEK_Blackboard_Sticker.Pages
@@ -65,15 +66,22 @@ await Task.Run(() =>
                     {
                         liveWeather = JsonConvert.DeserializeObject<LiveWeather>(File.ReadAllText(liveWeatherFilePath));
 
-                        if (liveWeather.adcode != Weather.GetCityCode(MainWindow.Settings.InfoBoard.WeatherCity))
+                        if (liveWeather != null)
                         {
-                            UpdateLiveWeather();
-                            if (File.Exists("Weather/CastWeather.json"))
+                            if (liveWeather.adcode != Weather.GetCityCode(MainWindow.Settings.InfoBoard.WeatherCity))
+                            {
+                                UpdateLiveWeather();
+                                if (File.Exists("Weather/CastWeather.json"))
+                                {
+                                    File.Delete("Weather/CastWeather.json");
+                                }
+                            }
+                            else if (liveWeather.isError)
                             {
-                                File.Delete("Weather/CastWeather.json");
+                                UpdateLiveWeather();
                             }
                         }
-                        else if (liveWeather.isError)
+                        else
                         {
                             UpdateLiveWeather();
                         }
@@ -95,12 +103,19 @@ await Task.Run(() =>
         private void UpdateLiveWeather()
         {
             liveWeather = Weather.GetLiveWeather(MainWindow.Settings.InfoBoard.WeatherCity);
-            File.WriteAllText(liveWeatherFilePath, JsonConvert.SerializeObject(liveWeather, Formatting.Indented));
+            try
+            {
+                File.WriteAllText(liveWeatherFilePath, JsonConvert.SerializeObject(liveWeather, Formatting.Indented));
+            }
+            catch (Exception ex)
+            {
+                LogHelper.NewLog(ex.Message);
+            }
         }
 
         private void ShowLiveWeather()
         {
-            if (!liveWeather.isError)
+            if (liveWeather != null && !liveWeather.isError)
             {
                 LabelWeatherInfo.Content = liveWeather.weather + " " + liveWeather.temperature + "℃";
                 LabelCity.Content = liveWeather.province + " " + liveWeather.city;