diff --git a/DownKyi/App.xaml.cs b/DownKyi/App.xaml.cs
index 48f9caf..b3723d8 100644
--- a/DownKyi/App.xaml.cs
+++ b/DownKyi/App.xaml.cs
@@ -14,6 +14,7 @@ using DownKyi.Views.Settings;
 using DownKyi.Views.Toolbox;
 using DownKyi.Views.UserSpace;
 using Prism.Ioc;
+using Prism.Services.Dialogs;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
diff --git a/DownKyi/Languages/Default.xaml b/DownKyi/Languages/Default.xaml
index eab777e..0204679 100644
--- a/DownKyi/Languages/Default.xaml
+++ b/DownKyi/Languages/Default.xaml
@@ -299,6 +299,8 @@
 
     <system:String x:Key="Allow">确定</system:String>
     <system:String x:Key="Cancel">取消</system:String>
+
+    <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>
 
     <!--  ViewDownloadSetter  -->
diff --git a/DownKyi/Services/AlertService.cs b/DownKyi/Services/AlertService.cs
index 504c758..e30a9ff 100644
--- a/DownKyi/Services/AlertService.cs
+++ b/DownKyi/Services/AlertService.cs
@@ -53,6 +53,10 @@ namespace DownKyi.Services
         private ButtonResult ShowMessage(VectorImage image, string type, string message)
         {
             ButtonResult result = ButtonResult.None;
+            if (dialogService == null)
+            {
+                return result;
+            }
 
             DialogParameters param = new DialogParameters
             {
diff --git a/DownKyi/ViewModels/DownloadManager/DownloadBaseItem.cs b/DownKyi/ViewModels/DownloadManager/DownloadBaseItem.cs
index 4586b8a..d1f1b30 100644
--- a/DownKyi/ViewModels/DownloadManager/DownloadBaseItem.cs
+++ b/DownKyi/ViewModels/DownloadManager/DownloadBaseItem.cs
@@ -2,6 +2,7 @@
 using DownKyi.Core.BiliApi.Zone;
 using DownKyi.Models;
 using Prism.Mvvm;
+using Prism.Services.Dialogs;
 using System.Windows;
 using System.Windows.Media;
 
@@ -9,6 +10,18 @@ namespace DownKyi.ViewModels.DownloadManager
 {
     public class DownloadBaseItem : BindableBase
     {
+        public IDialogService DialogService;
+
+        public DownloadBaseItem()
+        {
+            DialogService = null;
+        }
+
+        public DownloadBaseItem(IDialogService dialogService)
+        {
+            DialogService = dialogService;
+        }
+
         // model数据
         private DownloadBase downloadBase;
         public DownloadBase DownloadBase
diff --git a/DownKyi/ViewModels/DownloadManager/DownloadedItem.cs b/DownKyi/ViewModels/DownloadManager/DownloadedItem.cs
index 15fd55f..8bb6518 100644
--- a/DownKyi/ViewModels/DownloadManager/DownloadedItem.cs
+++ b/DownKyi/ViewModels/DownloadManager/DownloadedItem.cs
@@ -1,14 +1,20 @@
 using DownKyi.Images;
 using DownKyi.Models;
+using DownKyi.Services;
 using DownKyi.Utils;
 using Prism.Commands;
+using Prism.Services.Dialogs;
 using System.IO;
 
 namespace DownKyi.ViewModels.DownloadManager
 {
     public class DownloadedItem : DownloadBaseItem
     {
-        public DownloadedItem() : base()
+        public DownloadedItem() : this(null)
+        {
+        }
+
+        public DownloadedItem(IDialogService dialogService) : base(dialogService)
         {
             // 打开文件夹按钮
             OpenFolder = ButtonIcon.Instance().Folder;
@@ -131,6 +137,13 @@ namespace DownKyi.ViewModels.DownloadManager
         /// </summary>
         private void ExecuteRemoveVideoCommand()
         {
+            AlertService alertService = new AlertService(DialogService);
+            ButtonResult result = alertService.ShowWarning(DictionaryResource.GetString("ConfirmDelete"));
+            if (result != ButtonResult.OK)
+            {
+                return;
+            }
+
             App.DownloadedList.Remove(this);
         }
 
diff --git a/DownKyi/ViewModels/DownloadManager/DownloadingItem.cs b/DownKyi/ViewModels/DownloadManager/DownloadingItem.cs
index dc51226..0f090eb 100644
--- a/DownKyi/ViewModels/DownloadManager/DownloadingItem.cs
+++ b/DownKyi/ViewModels/DownloadManager/DownloadingItem.cs
@@ -1,14 +1,20 @@
 using DownKyi.Core.BiliApi.VideoStream.Models;
 using DownKyi.Images;
 using DownKyi.Models;
+using DownKyi.Services;
 using DownKyi.Utils;
 using Prism.Commands;
+using Prism.Services.Dialogs;
 
 namespace DownKyi.ViewModels.DownloadManager
 {
     public class DownloadingItem : DownloadBaseItem
     {
-        public DownloadingItem() : base()
+        public DownloadingItem() : this(null)
+        {
+        }
+
+        public DownloadingItem(IDialogService dialogService) : base(dialogService)
         {
             // 暂停继续按钮
             StartOrPause = ButtonIcon.Instance().Pause;
@@ -211,6 +217,13 @@ namespace DownKyi.ViewModels.DownloadManager
         /// </summary>
         private void ExecuteDeleteCommand()
         {
+            AlertService alertService = new AlertService(DialogService);
+            ButtonResult result = alertService.ShowWarning(DictionaryResource.GetString("ConfirmDelete"));
+            if (result != ButtonResult.OK)
+            {
+                return;
+            }
+
             App.DownloadingList.Remove(this);
         }
 
diff --git a/DownKyi/ViewModels/DownloadManager/ViewDownloadFinishedViewModel.cs b/DownKyi/ViewModels/DownloadManager/ViewDownloadFinishedViewModel.cs
index c4d94a1..9a081c3 100644
--- a/DownKyi/ViewModels/DownloadManager/ViewDownloadFinishedViewModel.cs
+++ b/DownKyi/ViewModels/DownloadManager/ViewDownloadFinishedViewModel.cs
@@ -1,9 +1,14 @@
 using DownKyi.Core.Settings;
+using DownKyi.Services;
+using DownKyi.Utils;
 using Prism.Commands;
 using Prism.Events;
+using Prism.Regions;
+using Prism.Services.Dialogs;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Collections.Specialized;
 using System.Linq;
 using System.Threading.Tasks;
 
@@ -31,10 +36,27 @@ namespace DownKyi.ViewModels.DownloadManager
 
         #endregion
 
-        public ViewDownloadFinishedViewModel(IEventAggregator eventAggregator) : base(eventAggregator)
+        public ViewDownloadFinishedViewModel(IEventAggregator eventAggregator, IDialogService dialogService) : base(eventAggregator, dialogService)
         {
             // 初始化DownloadedList
             DownloadedList = App.DownloadedList;
+            DownloadedList.CollectionChanged += new NotifyCollectionChangedEventHandler(async (object sender, NotifyCollectionChangedEventArgs e) =>
+            {
+                await Task.Run(() =>
+                {
+                    if (e.Action == NotifyCollectionChangedAction.Add)
+                    {
+                        foreach (var item in DownloadedList)
+                        {
+                            if (item != null && item.DialogService == null)
+                            {
+                                item.DialogService = dialogService;
+                            }
+                        }
+                    }
+                });
+            });
+            SetDialogService();
 
             DownloadFinishedSort finishedSort = SettingsManager.GetInstance().GetDownloadFinishedSort();
             switch (finishedSort)
@@ -95,6 +117,13 @@ namespace DownKyi.ViewModels.DownloadManager
         /// </summary>
         private async void ExecuteClearAllDownloadedCommand()
         {
+            AlertService alertService = new AlertService(dialogService);
+            ButtonResult result = alertService.ShowWarning(DictionaryResource.GetString("ConfirmDelete"));
+            if (result != ButtonResult.OK)
+            {
+                return;
+            }
+
             // 使用Clear()不能触发NotifyCollectionChangedAction.Remove事件
             // 因此遍历删除
             // DownloadingList中元素被删除后不能继续遍历
@@ -113,5 +142,26 @@ namespace DownKyi.ViewModels.DownloadManager
 
         #endregion
 
+        private async void SetDialogService()
+        {
+            await Task.Run(() =>
+            {
+                foreach (var item in DownloadedList)
+                {
+                    if (item != null && item.DialogService == null)
+                    {
+                        item.DialogService = dialogService;
+                    }
+                }
+            });
+        }
+
+        public override void OnNavigatedFrom(NavigationContext navigationContext)
+        {
+            base.OnNavigatedFrom(navigationContext);
+
+            SetDialogService();
+        }
+
     }
 }
diff --git a/DownKyi/ViewModels/DownloadManager/ViewDownloadingViewModel.cs b/DownKyi/ViewModels/DownloadManager/ViewDownloadingViewModel.cs
index a30c30b..aade091 100644
--- a/DownKyi/ViewModels/DownloadManager/ViewDownloadingViewModel.cs
+++ b/DownKyi/ViewModels/DownloadManager/ViewDownloadingViewModel.cs
@@ -1,11 +1,15 @@
 using DownKyi.Images;
 using DownKyi.Models;
+using DownKyi.Services;
 using DownKyi.Utils;
 using Prism.Commands;
 using Prism.Events;
+using Prism.Regions;
+using Prism.Services.Dialogs;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Collections.Specialized;
 using System.Linq;
 using System.Threading.Tasks;
 
@@ -26,10 +30,28 @@ namespace DownKyi.ViewModels.DownloadManager
 
         #endregion
 
-        public ViewDownloadingViewModel(IEventAggregator eventAggregator) : base(eventAggregator)
+        public ViewDownloadingViewModel(IEventAggregator eventAggregator, IDialogService dialogService) : base(eventAggregator, dialogService)
         {
             // 初始化DownloadingList
             DownloadingList = App.DownloadingList;
+            DownloadingList.CollectionChanged += new NotifyCollectionChangedEventHandler(async (object sender, NotifyCollectionChangedEventArgs e) =>
+            {
+                await Task.Run(() =>
+                {
+                    if (e.Action == NotifyCollectionChangedAction.Add)
+                    {
+                        foreach (var item in DownloadingList)
+                        {
+                            if (item != null && item.DialogService == null)
+                            {
+                                item.DialogService = dialogService;
+                            }
+                        }
+                    }
+                });
+            });
+            SetDialogService();
+
         }
 
         #region 命令申明
@@ -133,6 +155,13 @@ namespace DownKyi.ViewModels.DownloadManager
         /// </summary>
         private async void ExecuteDeleteAllDownloadingCommand()
         {
+            AlertService alertService = new AlertService(dialogService);
+            ButtonResult result = alertService.ShowWarning(DictionaryResource.GetString("ConfirmDelete"));
+            if (result != ButtonResult.OK)
+            {
+                return;
+            }
+
             // 使用Clear()不能触发NotifyCollectionChangedAction.Remove事件
             // 因此遍历删除
             // DownloadingList中元素被删除后不能继续遍历
@@ -151,5 +180,26 @@ namespace DownKyi.ViewModels.DownloadManager
 
         #endregion
 
+        private async void SetDialogService()
+        {
+            await Task.Run(() =>
+            {
+                foreach (var item in DownloadingList)
+                {
+                    if (item != null && item.DialogService == null)
+                    {
+                        item.DialogService = dialogService;
+                    }
+                }
+            });
+        }
+
+        public override void OnNavigatedFrom(NavigationContext navigationContext)
+        {
+            base.OnNavigatedFrom(navigationContext);
+
+            SetDialogService();
+        }
+
     }
 }