diff --git a/.editorconfig b/.editorconfig
index 99b0e38..58b988c 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -2,3 +2,6 @@
 
 # IDE0063: 使用简单的 "using" 语句
 dotnet_diagnostic.IDE0063.severity = none
+
+# CS8602: 解引用可能出现空引用。
+dotnet_diagnostic.CS8602.severity = none
diff --git a/Controllers/ImageController.cs b/Controllers/ImageController.cs
index b246ae7..83fb05c 100644
--- a/Controllers/ImageController.cs
+++ b/Controllers/ImageController.cs
@@ -2,6 +2,7 @@
 using ImageBed.Data.Access;
 using ImageBed.Data.Entity;
 using Microsoft.AspNetCore.Mvc;
+using static ImageBed.Common.UnitNameGenerator;
 
 namespace ImageBed.Controllers
 {
@@ -90,14 +91,15 @@ public async Task<ApiResult<object>> Post([FromForm] IFormCollection formCollect
         /// <param name="filename">图片名称</param>
         /// <param name="imageDirPath">图片存储文件夹</param>
         /// <returns></returns>
-        private async Task<ImageEntity> SaveImage(Stream fileReader, string filename, string imageDirPath)
+        private static async Task<ImageEntity> SaveImage(Stream fileReader, string filename, string imageDirPath)
         {
             // 格式化文件名
-            string unitFileName = UnitNameGenerator.RenameFile(imageDirPath, filename, GlobalValues.appSetting.Data.Resources.Images.RenameFormat);
+            RenameFormat renameFormat = GlobalValues.appSetting?.Data?.Resources?.Images?.RenameFormat ?? UnitNameGenerator.RenameFormat.MD5;
+            string unitFileName = RenameFile(imageDirPath, filename, renameFormat);
             string unitFilePath = $"{imageDirPath}/{unitFileName}";
 
             // 检查是否命名冲突
-            if ((GlobalValues.appSetting.Data.Resources.Images.RenameFormat == UnitNameGenerator.RenameFormat.NONE) && System.IO.File.Exists(unitFilePath))
+            if ((renameFormat == RenameFormat.NONE) && System.IO.File.Exists(unitFilePath))
             {
                 System.IO.File.Delete(unitFilePath);
             }
@@ -137,7 +139,7 @@ private async Task<ImageEntity> SaveImage(Stream fileReader, string filename, st
         /// <param name="fileReader">文件输入流</param>
         /// <param name="dstDirPath">文件存储路径</param>
         /// <returns></returns>
-        private async Task SaveFile(Stream fileReader, string dstDirPath)
+        private static async Task SaveFile(Stream fileReader, string dstDirPath)
         {
             if (System.IO.File.Exists(dstDirPath))
             {
diff --git a/Data/Access/OurDbContext.cs b/Data/Access/OurDbContext.cs
index a95e1e7..8254a37 100644
--- a/Data/Access/OurDbContext.cs
+++ b/Data/Access/OurDbContext.cs
@@ -9,8 +9,8 @@ public class OurDbContext : DbContext
         public OurDbContext() { }
         public OurDbContext(DbContextOptions<OurDbContext> options) : base(options) { }
 
-        public DbSet<ImageEntity> Images { get; set; }
-        public DbSet<RecordEntity> Records { get; set; }
+        public DbSet<ImageEntity>? Images { get; set; }
+        public DbSet<RecordEntity>? Records { get; set; }
 
 
         /// <summary>
@@ -93,7 +93,7 @@ public async Task<bool> Update(ImageEntity image)
                 try
                 {
                     _context.Images.Update(image);
-                    _ = _context.SaveChangesAsync();
+                    await _context.SaveChangesAsync();
                     return true;
                 }
                 catch (Exception) { }
@@ -115,6 +115,7 @@ public async Task<List<ImageEntity>> Get()
             return new List<ImageEntity>();
         }
 
+
         /// <summary>
         /// 获取数据库中指定ID的图片信息
         /// </summary>
@@ -202,7 +203,7 @@ public async Task<bool> RemoveRangeAsync(List<ImageEntity> images)
                         }
                     });
                     _context.Images.RemoveRange(images);
-                    _ = _context.SaveChangesAsync();
+                    await _context.SaveChangesAsync();
                     return true;
                 }
                 catch {}
diff --git a/Data/Database/imagebed.sqlite b/Data/Database/imagebed.sqlite
index e2322b6..0acfd0e 100644
Binary files a/Data/Database/imagebed.sqlite and b/Data/Database/imagebed.sqlite differ
diff --git a/Pages/Pics.razor b/Pages/Pics.razor
index 2fd9e06..3860700 100644
--- a/Pages/Pics.razor
+++ b/Pages/Pics.razor
@@ -92,7 +92,7 @@
     }
 </Space>
 @code{
-    async void RemoveSelectedImages()
+    async Task RemoveSelectedImages()
     {
         using (var context = new OurDbContext())
         {
@@ -170,13 +170,13 @@
 </Table>
 
 @code {
-    ITable table;
+    ITable? table;
     int _pageSize = 8;
     int _total;
 
     List<ImageEntity> imagesShow = new();
     List<ImageEntity> imagesAll = new();
-    IEnumerable<ImageEntity> imagesSelected;
+    IEnumerable<ImageEntity>? imagesSelected;
 
     protected override async Task OnInitializedAsync()
     {
@@ -193,11 +193,11 @@
         if (!string.IsNullOrEmpty(content))
         {
             await JS.InvokeVoidAsync("CopyToClip", content);
-            _message.Success("已拷贝链接到剪贴板！");
+            _ = _message.Success("已拷贝链接到剪贴板！");
         }
         else
         {
-            await _message.Error("拷贝链接失败！");
+            _ = _message.Error("拷贝链接失败！");
         }
     }
 
@@ -212,19 +212,22 @@
     {
         if (!string.IsNullOrEmpty(id))
         {
-            using var context = new OurDbContext();
-            using var sqlImageData = new SQLImageData(context);
+            using (var context = new OurDbContext())
+            {
+                using (var sqlImageData = new SQLImageData(context))
+                {
+                    _ = sqlImageData.Remove(id);
 
-            await sqlImageData.Remove(id);
+                    ImageEntity? image = imagesAll.FirstOrDefault(image => image.Id == id);
+                    if(image != null)
+                    {
+                        imagesAll.Remove(image);
+                        OnSearch();
+                    }
 
-            ImageEntity? image = imagesAll.FirstOrDefault(image => image.Id == id);
-            if(image != null)
-            {
-                imagesAll.Remove(image);
-                OnSearch();
+                    _ = _message.Success("图片已删除！");
+                }
             }
-
-            _message.Success("图片已删除！");
         }
     }
 }
\ No newline at end of file