下载前检测无效的下载目录

DownKyi/App.xaml.cs

@@ -131,19 +131,16 @@ namespace DownKyi
                 case Downloader.NOT_SET:
                     break;
                 case Downloader.BUILT_IN:
-                    downloadService = new BuiltinDownloadService(DownloadingList, DownloadedList);
+                    downloadService = new BuiltinDownloadService(DownloadingList, DownloadedList, (IDialogService)Container.GetContainer().GetService(typeof(IDialogService)));
                     break;
                 case Downloader.ARIA:
                     downloadService = new AriaDownloadService(DownloadingList, DownloadedList, (IDialogService)Container.GetContainer().GetService(typeof(IDialogService)));
                     break;
                 case Downloader.CUSTOM_ARIA:
-                    downloadService = new CustomAriaDownloadService(DownloadingList, DownloadedList);
+                    downloadService = new CustomAriaDownloadService(DownloadingList, DownloadedList, (IDialogService)Container.GetContainer().GetService(typeof(IDialogService)));
                     break;
             }
-            if (downloadService != null)
-            {
-                downloadService.Start();
-            }
+            downloadService?.Start();
 
             return Container.Resolve<MainWindow>();
         }

DownKyi/Languages/Default.xaml

@@ -326,6 +326,8 @@
     <system:String x:Key="ConfirmDelete">您确定要删除吗？</system:String>
     <system:String x:Key="SelectDirectory">请选择文件夹</system:String>
 
+    <system:String x:Key="DirectoryError">路径错误！</system:String>
+
     <!--  ViewDownloadSetter  -->
     <system:String x:Key="DownloadSetter">下载设置</system:String>
     <system:String x:Key="Location">位置：</system:String>

DownKyi/Services/Download/AriaDownloadService.cs

@@ -26,16 +26,13 @@ namespace DownKyi.Services.Download
     /// </summary>
     public class AriaDownloadService : DownloadService, IDownloadService
     {
-        private readonly IDialogService dialogService;
-
         public AriaDownloadService(
             ObservableCollection<DownloadingItem> downloadingList,
             ObservableCollection<DownloadedItem> downloadedList,
-            IDialogService dialogService = null) :
-            base(downloadingList, downloadedList)
+            IDialogService dialogService) :
+            base(downloadingList, downloadedList, dialogService)
         {
             Tag = "AriaDownloadService";
-            this.dialogService = dialogService;
         }
 
         #region 音视频
@@ -345,7 +342,7 @@ namespace DownKyi.Services.Download
             if (task) { Console.WriteLine("Start ServerAsync Completed"); }
 
             // 显示错误信息
-            if (dialogService != null && errorMessage != null && errorMessage.Contains("ERROR"))
+            if (errorMessage != null && errorMessage.Contains("ERROR"))
             {
                 AlertService alertService = new AlertService(dialogService);
                 ButtonResult result = alertService.ShowMessage(SystemIcon.Instance().Error,

DownKyi/Services/Download/BuiltinDownloadService.cs

@@ -7,6 +7,7 @@ using DownKyi.Core.Utils;
 using DownKyi.Models;
 using DownKyi.Utils;
 using DownKyi.ViewModels.DownloadManager;
+using Prism.Services.Dialogs;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
@@ -19,7 +20,10 @@ namespace DownKyi.Services.Download
 {
     public class BuiltinDownloadService : DownloadService, IDownloadService
     {
-        public BuiltinDownloadService(ObservableCollection<DownloadingItem> downloadingList, ObservableCollection<DownloadedItem> downloadedList) : base(downloadingList, downloadedList)
+        public BuiltinDownloadService(ObservableCollection<DownloadingItem> downloadingList, 
+            ObservableCollection<DownloadedItem> downloadedList,
+            IDialogService dialogService
+            ) : base(downloadingList, downloadedList, dialogService)
         {
             Tag = "BuiltinDownloadService";
         }

DownKyi/Services/Download/CustomAriaDownloadService.cs

@@ -9,6 +9,7 @@ using DownKyi.Core.Utils;
 using DownKyi.Models;
 using DownKyi.Utils;
 using DownKyi.ViewModels.DownloadManager;
+using Prism.Services.Dialogs;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
@@ -23,7 +24,10 @@ namespace DownKyi.Services.Download
     /// </summary>
     public class CustomAriaDownloadService : DownloadService, IDownloadService
     {
-        public CustomAriaDownloadService(ObservableCollection<DownloadingItem> downloadingList, ObservableCollection<DownloadedItem> downloadedList) : base(downloadingList, downloadedList)
+        public CustomAriaDownloadService(ObservableCollection<DownloadingItem> downloadingList,
+            ObservableCollection<DownloadedItem> downloadedList,
+            IDialogService dialogService
+            ) : base(downloadingList, downloadedList, dialogService)
         {
             Tag = "AriaDownloadService";
         }

DownKyi/Services/Download/DownloadService.cs

@@ -11,6 +11,7 @@ using DownKyi.Images;
 using DownKyi.Models;
 using DownKyi.Utils;
 using DownKyi.ViewModels.DownloadManager;
+using Prism.Services.Dialogs;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
@@ -25,6 +26,8 @@ namespace DownKyi.Services.Download
     {
         protected string Tag = "DownloadService";
 
+        protected IDialogService dialogService;
+
         protected ObservableCollection<DownloadingItem> downloadingList;
         protected ObservableCollection<DownloadedItem> downloadedList;
 
@@ -41,10 +44,13 @@ namespace DownKyi.Services.Download
         /// </summary>
         /// <param name="downloading"></param>
         /// <returns></returns>
-        public DownloadService(ObservableCollection<DownloadingItem> downloadingList, ObservableCollection<DownloadedItem> downloadedList)
+        public DownloadService(ObservableCollection<DownloadingItem> downloadingList,
+            ObservableCollection<DownloadedItem> downloadedList,
+          IDialogService dialogService)
         {
             this.downloadingList = downloadingList;
             this.downloadedList = downloadedList;
+            this.dialogService = dialogService;
         }
 
         protected PlayUrlDashVideo BaseDownloadAudio(DownloadingItem downloading)
@@ -437,9 +443,22 @@ namespace DownKyi.Services.Download
 
             // 路径不存在则创建
             if (!Directory.Exists(path))
+            {
+                try
                 {
                     Directory.CreateDirectory(path);
                 }
+                catch (Exception e)
+                {
+                    Core.Utils.Debugging.Console.PrintLine(Tag, e.ToString());
+                    LogManager.Debug(Tag, e.Message);
+
+                    AlertService alertService = new AlertService(dialogService);
+                    ButtonResult result = alertService.ShowError($"{path}{DictionaryResource.GetString("DirectoryError")}");
+
+                    return;
+                }
+            }
 
             try
             {