diff --git a/Correlator/ViewModels/AudioFileViewModel.cs b/Correlator/ViewModels/AudioFileViewModel.cs
index 3cd57b9..94c385d 100644
--- a/Correlator/ViewModels/AudioFileViewModel.cs
+++ b/Correlator/ViewModels/AudioFileViewModel.cs
@@ -155,9 +155,7 @@
             {
                 if (_selectedFile == null)
                 {
-                    dialogService.ShowDialog(
-                        "AlertMessageDialog",
-                        new DialogParameters
+                    dialogService.ShowDialog("AlertMessageDialog", new DialogParameters
                         {
                             { "AlertType", AlertType.Error }, { "Title", "温馨提示" }, { "Message", "音频文件路径错误，无法播放" }
                         },
@@ -187,9 +185,7 @@
                     {
                         DisposeResource("未播放");
 
-                        dialogService.ShowDialog(
-                            "AlertMessageDialog",
-                            new DialogParameters
+                        dialogService.ShowDialog("AlertMessageDialog", new DialogParameters
                             {
                                 { "AlertType", AlertType.Error }, { "Title", "温馨提示" }, { "Message", "音频文件已损坏，无法播放" }
                             },
@@ -209,9 +205,7 @@
 
                 if (audioService.Wave.PlaybackState == PlaybackState.Playing)
                 {
-                    dialogService.ShowDialog(
-                        "AlertMessageDialog",
-                        new DialogParameters
+                    dialogService.ShowDialog("AlertMessageDialog", new DialogParameters
                         {
                             { "AlertType", AlertType.Error }, { "Title", "温馨提示" }, { "Message", "音频播放中，请勿删除" }
                         },
@@ -273,7 +267,10 @@
             var audioFiles = new List<AudioFile>();
             var i = 1;
             //筛选大于50K的音频文件
-            var files = new DirectoryInfo(DirectoryManager.GetAudioDir()).GetFiles("*", SearchOption.AllDirectories);
+            var files = new DirectoryInfo(DirectoryManager.GetAudioDir())
+                .GetFiles("*", SearchOption.AllDirectories)
+                .OrderBy(file => file.CreationTime)
+                .Reverse();
             foreach (var file in files)
             {
                 if (file.Length < 1024 * 50)

diff --git a/Correlator/ViewModels/AudioFileViewModel.cs b/Correlator/ViewModels/AudioFileViewModel.cs
index 3cd57b9..94c385d 100644
--- a/Correlator/ViewModels/AudioFileViewModel.cs
+++ b/Correlator/ViewModels/AudioFileViewModel.cs
@@ -155,9 +155,7 @@
             {
                 if (_selectedFile == null)
                 {
-                    dialogService.ShowDialog(
-                        "AlertMessageDialog",
-                        new DialogParameters
+                    dialogService.ShowDialog("AlertMessageDialog", new DialogParameters
                         {
                             { "AlertType", AlertType.Error }, { "Title", "温馨提示" }, { "Message", "音频文件路径错误，无法播放" }
                         },
@@ -187,9 +185,7 @@
                     {
                         DisposeResource("未播放");
 
-                        dialogService.ShowDialog(
-                            "AlertMessageDialog",
-                            new DialogParameters
+                        dialogService.ShowDialog("AlertMessageDialog", new DialogParameters
                             {
                                 { "AlertType", AlertType.Error }, { "Title", "温馨提示" }, { "Message", "音频文件已损坏，无法播放" }
                             },
@@ -209,9 +205,7 @@
 
                 if (audioService.Wave.PlaybackState == PlaybackState.Playing)
                 {
-                    dialogService.ShowDialog(
-                        "AlertMessageDialog",
-                        new DialogParameters
+                    dialogService.ShowDialog("AlertMessageDialog", new DialogParameters
                         {
                             { "AlertType", AlertType.Error }, { "Title", "温馨提示" }, { "Message", "音频播放中，请勿删除" }
                         },
@@ -273,7 +267,10 @@
             var audioFiles = new List<AudioFile>();
             var i = 1;
             //筛选大于50K的音频文件
-            var files = new DirectoryInfo(DirectoryManager.GetAudioDir()).GetFiles("*", SearchOption.AllDirectories);
+            var files = new DirectoryInfo(DirectoryManager.GetAudioDir())
+                .GetFiles("*", SearchOption.AllDirectories)
+                .OrderBy(file => file.CreationTime)
+                .Reverse();
             foreach (var file in files)
             {
                 if (file.Length < 1024 * 50)
diff --git a/Correlator/ViewModels/PictureFileViewModel.cs b/Correlator/ViewModels/PictureFileViewModel.cs
index 897753b..f1c7e1f 100644
--- a/Correlator/ViewModels/PictureFileViewModel.cs
+++ b/Correlator/ViewModels/PictureFileViewModel.cs
@@ -85,19 +85,20 @@
             {
                 if (_selectedFile == null)
                 {
-                    dialogService.ShowDialog(
-                        "AlertMessageDialog",
-                        new DialogParameters
+                    dialogService.ShowDialog("AlertMessageDialog", new DialogParameters
                         {
                             { "AlertType", AlertType.Error }, { "Title", "温馨提示" }, { "Message", "图片文件路径错误，无法查看" }
-                        },
+                        }, 
                         delegate { }
                     );
                     return;
                 }
-                
-                dialogService.ShowDialog("BigPictureView",
-                    new DialogParameters { { "ImageFullPath", _selectedFile.FullPath } }, delegate { });
+
+                dialogService.ShowDialog("BigPictureView", new DialogParameters
+                    {
+                        { "ImageFullPath", _selectedFile.FullPath }
+                    },
+                    delegate { });
             });
 
             DeletePictureCommand = new DelegateCommand(() =>
@@ -152,7 +153,8 @@
         private static List<ImageFile> GetTotalPictureFiles()
         {
             var i = 1;
-            return new DirectoryInfo(DirectoryManager.GetPictureDir()).GetFiles("*", SearchOption.AllDirectories)
+            var files = new DirectoryInfo(DirectoryManager.GetPictureDir())
+                .GetFiles("*", SearchOption.AllDirectories)
                 .Select(file => new ImageFile
                 {
                     Order = i++,
@@ -161,7 +163,10 @@
                     FullPath = DirectoryManager.GetPictureDir() + "\\" + file.Name,
                     FileSize = file.Length.FormatFileSize(),
                     CreationTime = file.LastWriteTime.ToString("yyyy-MM-dd HH:mm:ss")
-                }).ToList();
+                })
+                .OrderBy(file => file.CreationTime)
+                .Reverse();
+            return files.ToList();
         }
     }
 }
\ No newline at end of file