Attempt to fix crash when device name cannot be read

Author: WentTheFox

BluetoothHeartrateModule/BluetoothHeartrateModule.csproj

@@ -4,8 +4,8 @@
 		<TargetFramework>net6.0-windows10.0.22621.0</TargetFramework>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
-		<AssemblyVersion>1.3.1</AssemblyVersion>
-		<FileVersion>1.3.1</FileVersion>
+		<AssemblyVersion>1.3.2</AssemblyVersion>
+		<FileVersion>1.3.2</FileVersion>
 		<Authors>DJDavid98</Authors>
 		<Product>Bluetooth Heartrate</Product>
 		<ApplicationIcon>logo\logo.ico</ApplicationIcon>

BluetoothHeartrateModule/BluetoothHeartrateProvider.cs

@@ -93,7 +93,8 @@ private async void Watcher_Received(BluetoothLEAdvertisementWatcher sender, Blue
                 var deviceNamesValue = deviceNames.GetValueOrDefault(advertisementMac, null);
                 if (deviceNamesValue == null)
                 {
-                    var advertisementDeviceName = await DeviceNameResolver.GetDeviceNameAsync(args.Advertisement, args.BluetoothAddress);
+                    var dnr = new DeviceNameResolver(module);
+                    var advertisementDeviceName = await dnr.GetDeviceNameAsync(args.Advertisement, args.BluetoothAddress);
                     deviceNames[advertisementMac] = advertisementDeviceName;
                     if (!isConfiguredDevice)
                     {

BluetoothHeartrateModule/DeviceNameResolver.cs

@@ -8,34 +8,52 @@ namespace BluetoothHeartrateModule
 {
     internal class DeviceNameResolver
     {
-        internal static async Task<string> GetDeviceNameAsync(BluetoothLEAdvertisement advertisement, ulong bluetoothAddress)
+        BluetoothHeartrateModule module;
+
+        public DeviceNameResolver(BluetoothHeartrateModule module)
         {
-            var advertisementDeviceName = advertisement.LocalName;
-            if (advertisementDeviceName != string.Empty)
-            {
-                return advertisementDeviceName;
-            }
+            this.module = module;
+        }
 
-            using var device = await BluetoothLEDevice.FromBluetoothAddressAsync(bluetoothAddress);
-            // Get the device name using the DeviceInformation class
-            DeviceInformation deviceInfo = await DeviceInformation.CreateFromIdAsync(device.DeviceId);
-            var deviceName = deviceInfo.Name;
-            if (deviceName == string.Empty)
+        internal async Task<string> GetDeviceNameAsync(BluetoothLEAdvertisement advertisement, ulong bluetoothAddress)
+        {
+            var deviceName = string.Empty;
+            try
             {
-                var services = await device.GetGattServicesForUuidAsync(GattServiceUuids.GenericAccess);
-                if (services.Services.Count > 0)
+                var advertisementDeviceName = advertisement.LocalName;
+                if (advertisementDeviceName != string.Empty)
                 {
-                    var service = services.Services[0];
-                    var characteristics = await service.GetCharacteristicsForUuidAsync(GattCharacteristicUuids.GapDeviceName);
-                    if (characteristics.Characteristics.Count > 0)
+                    return advertisementDeviceName;
+                }
+
+                using var device = await BluetoothLEDevice.FromBluetoothAddressAsync(bluetoothAddress);
+                // Get the device name using the DeviceInformation class
+                DeviceInformation deviceInfo = await DeviceInformation.CreateFromIdAsync(device.DeviceId);
+                deviceName = deviceInfo.Name;
+                if (deviceName == string.Empty)
+                {
+                    var services = await device.GetGattServicesForUuidAsync(GattServiceUuids.GenericAccess);
+                    if (services.Services.Count > 0)
                     {
-                        var characteristic = characteristics.Characteristics[0];
-                        var value = await characteristic.ReadValueAsync(BluetoothCacheMode.Uncached);
-                        deviceName = DataReader.FromBuffer(value.Value).ReadString(value.Value.Length);
+                        var service = services.Services[0];
+                        var characteristics = await service.GetCharacteristicsForUuidAsync(GattCharacteristicUuids.GapDeviceName);
+                        if (characteristics.Characteristics.Count > 0)
+                        {
+                            var characteristic = characteristics.Characteristics[0];
+                            var value = await characteristic.ReadValueAsync(BluetoothCacheMode.Uncached);
+                            if (value != null)
+                            {
+                                deviceName = DataReader.FromBuffer(value.Value).ReadString(value.Value.Length);
+                            }
+                        }
                     }
+                    foreach (var service in services.Services)
+                        service.Dispose();
                 }
-                foreach (var service in services.Services)
-                    service.Dispose();
+            }
+            catch (Exception ex)
+            {
+                module.Log($"Could not get device name for address {Converter.FormatAsMac(bluetoothAddress)}: {ex.Message}\n{ex.StackTrace}");
             }
             return GetDeviceNameOrFallback(deviceName);
         }