修复部分编译警告

AppCard.cs

@@ -23,9 +23,14 @@ namespace AppStore
 
         public AppCard()
         {
-            iconBox = new PictureBox();
+            // 确保关键对象不为null
-            nameLabel = new Label();
+            iconBox = new PictureBox() { SizeMode = PictureBoxSizeMode.StretchImage };
-            downloadBtn = new Button();
+            nameLabel = new Label() { Text = string.Empty };
+            downloadBtn = new Button() { Text = "下载" };
+            
+            // 确保DownloadManager已初始化
+            var _ = DownloadManager.Instance;
+            
             InitializeComponent();
         }
 
@@ -241,25 +246,64 @@ namespace AppStore
                 }
             }
 
-            // 应用计算好的路径
+            // 应用计算好的路径 - 更严格的null检查和异常处理
-            if (path != null)
+            try 
             {
-                this.Invoke((MethodInvoker)delegate {
+                var safePath = path ?? CalculatePathFallback(Width, Height, 10);
-                    this.Region = new Region(path); // 设置控件区域
+                // 更严格的null检查，包括路径和控件状态
-                    this.Refresh(); // 重绘控件
+                if (safePath != null && 
-                });
+                    safePath.PointCount > 0 && 
+                    this.IsHandleCreated &&
+                    !this.IsDisposed)
+                {
+                    this.Invoke((MethodInvoker)delegate {
+                        try 
+                        {
+                            // 委托内部再次验证safePath
+                            if (safePath != null && safePath.PointCount > 0)
+                            {
+                                var validPath = safePath; // 确保非null
+                                using (var region = new Region(validPath))
+                                {
+                                    this.Region = region;
+                                    this.Refresh();
+                                }
+                            }
+                        }
+                        catch (Exception ex)
+                        {
+                            Debug.WriteLine($"创建Region失败: {ex.Message}");
+                            this.Region = null;
+                            this.Refresh();
+                        }
+                    });
+                }
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"初始化卡片路径失败: {ex.Message}");
             }
         }
 
         private System.Drawing.Drawing2D.GraphicsPath CalculatePathFallback(int width, int height, int radius)
         {
-            var path = new System.Drawing.Drawing2D.GraphicsPath();
+            try 
-            path.AddArc(0, 0, radius * 2, radius * 2, 180, 90);
+            {
-            path.AddArc(width - radius * 2, 0, radius * 2, radius * 2, 270, 90);
+                var path = new System.Drawing.Drawing2D.GraphicsPath();
-            path.AddArc(width - radius * 2, height - radius * 2, radius * 2, radius * 2, 0, 90);
+                path.AddArc(0, 0, radius * 2, radius * 2, 180, 90);
-            path.AddArc(0, height - radius * 2, radius * 2, radius * 2, 90, 90);
+                path.AddArc(width - radius * 2, 0, radius * 2, radius * 2, 270, 90);
-            path.CloseFigure();
+                path.AddArc(width - radius * 2, height - radius * 2, radius * 2, radius * 2, 0, 90);
-            return path;
+                path.AddArc(0, height - radius * 2, radius * 2, radius * 2, 90, 90);
+                path.CloseFigure();
+                return path;
+            }
+            catch
+            {
+                // 绝对回退方案 - 返回最小有效路径
+                var path = new System.Drawing.Drawing2D.GraphicsPath();
+                path.AddRectangle(new Rectangle(0, 0, width, height));
+                return path;
+            }
         }
 
         public void UpdateDisplay()
@@ -270,19 +314,39 @@ namespace AppStore
 
         private void DownloadBtn_Click(object sender, EventArgs e)
         {
-            if (sender == null || e == null) return;
+            try
-            if (!string.IsNullOrEmpty(DownloadUrl))
             {
-                try
+                // 更严格的null检查
+                // 更严格的null检查，包括DownloadManager.Instance和其方法
+                // 全面的null和状态检查
+                if (sender == null || e == null || 
+                    string.IsNullOrWhiteSpace(DownloadUrl) || 
+                    string.IsNullOrWhiteSpace(AppName) ||
+                    !this.IsHandleCreated ||
+                    this.IsDisposed ||
+                    DownloadManager.Instance == null ||
+                    DownloadManager.Instance.DownloadItems == null ||
+                    DownloadManager.Instance.StartDownload == null)
                 {
-                    string fileName = $"{AppName.Replace(" ", "_")}.exe";
+                    return;
-                    DownloadManager.Instance.StartDownload(fileName, DownloadUrl);
-                    MessageBox.Show($"已开始下载: {AppName}", "下载中", MessageBoxButtons.OK, MessageBoxIcon.Information);
-                }
-                catch (Exception ex)
-                {
-                    MessageBox.Show($"下载失败: {ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                 }
+
+                string safeAppName = AppName ?? "未知应用";
+                string fileName = $"{safeAppName.Replace(" ", "_")}.exe";
+                
+                DownloadManager.Instance.StartDownload(fileName, DownloadUrl);
+                
+                string message = $"已开始下载: {safeAppName}";
+                this.Invoke((MethodInvoker)delegate {
+                    MessageBox.Show(this, message, "下载中", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                });
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"下载按钮点击处理失败: {ex.Message}");
+                this.Invoke((MethodInvoker)delegate {
+                    MessageBox.Show(this, "下载处理发生错误", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                });
             }
         }
     }

MainForm.cs

@@ -201,11 +201,86 @@ namespace AppStore
             // 添加所有应用卡片
             
 
+            flowPanel.Controls.Add(CreateAppCard(
+                "XDM",
+                "https://github.com/subhra74/xdm/releases/download/7.2.11/xdm-setup.msi",
+                "img/png/XDM.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "FDM",
+                "https://files2.freedownloadmanager.org/6/latest/fdm_x64_setup.exe",
+                "img/png/FDM.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "ABDM",
+                "https://ghproxy.net/https://github.com/amir1376/ab-download-manager/releases/download/v1.6.4/ABDownloadManager_1.6.4_windows_x64.exe",
+                "img/png/ABDM.png"));
+
             flowPanel.Controls.Add(CreateAppCard(
                 "python3.8",
                 "https://www.python.org/ftp/python/3.8.0/python-3.8.0-amd64.exe",
                 "img/png/python.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "Oracle Java8",
+                "https://sdlc-esd.oracle.com/ESD6/JSCDL/jdk/8u451-b10/8a1589aa0fe24566b4337beee47c2d29/jre-8u451-windows-x64.exe?GroupName=JSC&FilePath=/ESD6/JSCDL/jdk/8u451-b10/8a1589aa0fe24566b4337beee47c2d29/jre-8u451-windows-x64.exe&BHost=javadl.sun.com&File=jre-8u451-windows-x64.exe&AuthParam=1750252610_4d0f61835e3392b8f0158398fd5ebd90&ext=.exe",
+                "img/png/java.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "Rust",
+                "https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe",
+                "img/png/rust.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "Ruby",
+                "https://mirror.sjtu.edu.cn/github-release/oneclick/rubyinstaller2/releases/download/RubyInstaller-3.4.4-2/rubyinstaller-devkit-3.4.4-2-x64.exe",
+                "img/png/ruby.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "D",
+                "https://downloads.dlang.org/releases/2.x/2.111.0/dmd-2.111.0.exe",
+                "img/jpg/D.jpg"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "Go",
+                "https://golang.google.cn/dl/go1.24.4.windows-amd64.msi",
+                "img/png/Go.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "Node.js",
+                "https://nodejs.org/dist/v22.16.0/node-v22.16.0-x64.msi",
+                "img/png/nodejs.png"));
                 
+            flowPanel.Controls.Add(CreateAppCard(
+                "mingw-64",
+                "https://ghproxy.net/https://github.com/niXman/mingw-builds-binaries/releases/download/15.1.0-rt_v12-rev0/x86_64-15.1.0-release-posix-seh-ucrt-rt_v12-rev0.7z",
+                "img/png/mingw-64.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "Msys2",
+                "https://github.com/msys2/msys2-installer/releases/download/2025-02-21/msys2-x86_64-20250221.exe",
+                "img/png/MSYS2.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                ".NET SDK 8.0",
+                "https://dotnet.microsoft.com/zh-cn/download/dotnet/thank-you/sdk-8.0.411-windows-x64-installer",
+                "img/png/.NET.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "ASP.NET Core 运行时 8.0",
+                "https://dotnet.microsoft.com/zh-cn/download/dotnet/thank-you/runtime-aspnetcore-8.0.17-windows-x64-installer",
+                "img/png/.NET.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                ".NET 桌面运行时 8.0",
+                "https://dotnet.microsoft.com/zh-cn/download/dotnet/thank-you/runtime-desktop-8.0.17-windows-x64-installer",
+                "img/png/.NET.png"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                ".NET 运行时 8.0",
+                "https://dotnet.microsoft.com/zh-cn/download/dotnet/thank-you/runtime-8.0.17-windows-x64-installer",
+                "img/png/.NET.png"));
+            
             flowPanel.Controls.Add(CreateAppCard(
                 "openlist",
                 "https://ghproxy.net/https://github.com/OpenListTeam/OpenList/releases/download/beta/openlist-windows-amd64.zip",
@@ -226,6 +301,11 @@ namespace AppStore
                 "https://vscode.download.prss.microsoft.com/dbazure/download/stable/dfaf44141ea9deb3b4096f7cd6d24e00c147a4b1/VSCodeSetup-x64-1.101.0.exe",
                 "img/png/vscode.png"));
 
+            flowPanel.Controls.Add(CreateAppCard(
+                "vs community 2022",
+                "https://visualstudio.microsoft.com/zh-hans/thank-you-downloading-visual-studio/?sku=Community&channel=Release&version=VS2022&source=VSLandingPage&cid=2030&passive=false",
+                "img/jpg/vs.jpg"));
+
             flowPanel.Controls.Add(CreateAppCard(
                 "7-Zip",
                 "https://objects.githubusercontent.com/github-production-release-asset-2e65be/466446150/1645817e-3677-4207-93ff-e62de7e147be?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=releaseassetproduction%2F20250613%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20250613T035936Z&X-Amz-Expires=300&X-Amz-Signature=5e02d5fc34f45bd8308029c9fc78052007e9475ce0e32775619921cb8f3b83ea&X-Amz-SignedHeaders=host&response-content-disposition=attachment%3B%20filename%3D7z2409-x64.exe&response-content-type=application%2Foctet-stream",
@@ -236,6 +316,11 @@ namespace AppStore
                 "https://ghproxy.net/https://github.com/zs-yg/package/releases/download/v0.1/7-Zip.7z",
                 "img/png/7ziplogo.png"));
 
+            flowPanel.Controls.Add(CreateAppCard(
+                "peazip",
+                "https://ghproxy.net/https://github.com/peazip/PeaZip/releases/download/10.4.0/peazip-10.4.0.WIN64.exe",
+                "img/jpg/peazip.jpg"));
+
             flowPanel.Controls.Add(CreateAppCard(
                 "GreenShot",
                 "https://objects.githubusercontent.com/github-production-release-asset-2e65be/36756917/239aedb0-7d29-11e7-9f9c-d36ec4466ade?X-Amz-Algorithm=AWS4-HMAC-SSHA256&X-Amz-Credential=releaseassetproduction%2F20250613%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20250613T041723Z&X-Amz-Expires=300&X-Amz-Signature=be1ef88a68bbc7065af5111809d11de881022933b44f6d961eb6bd6e6b7e60a8&X-Amz-SignedHeaders=host&response-content-disposition=attachment%3B%20filename%3DGreenshot-INSTALLER-1.2.10.6-RELEASE.exe&response-content-type=application%2Foctet-stream",
@@ -276,26 +361,26 @@ namespace AppStore
                 "https://ghproxy.net/https://github.com/mifi/lossless-cut/releases/download/v3.64.0/LosslessCut-win-x64.7z",
                 "img/png/LosslessCut.png"));
 
-            flowPanel.Controls.Add(CreateAppCard(
-                "mingw-64",
-                "https://ghproxy.net/https://github.com/niXman/mingw-builds-binaries/releases/download/15.1.0-rt_v12-rev0/x86_64-15.1.0-release-posix-seh-ucrt-rt_v12-rev0.7z",
-                "img/png/mingw-64.png"));
-
             flowPanel.Controls.Add(CreateAppCard(
                 "Edge",
                 "https://msedge.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/cb21e6b5-3f63-4df2-bec3-a2015b80dc56/MicrosoftEdgeEnterpriseX64.msi",
                 "img/jpg/edge.jpg"));
 
+            flowPanel.Controls.Add(CreateAppCard(
+                "Min",
+                "https://ghproxy.net/https://github.com/minbrowser/min/releases/download/v1.35.0/min-1.35.0-setup.exe",
+                "img/jpg/Min.jpg"));
+
+            flowPanel.Controls.Add(CreateAppCard(
+                "Brave",
+                "https://ghproxy.net/https://github.com/brave/brave-browser/releases/download/v1.79.126/BraveBrowserSetup.exe",
+                "img/png/brave.png"));
+
             flowPanel.Controls.Add(CreateAppCard(
                 "Firefox",
                 "https://download-ssl.firefox.com.cn/releases-sha2/full/116.0/zh-CN/Firefox-full-latest-win64.exe",
                 "img/jpg/firefox.jpg"));
 
-            flowPanel.Controls.Add(CreateAppCard(
-                "Msys2",
-                "https://github.com/msys2/msys2-installer/releases/download/2025-02-21/msys2-x86_64-20250221.exe",
-                "img/png/MSYS2.png"));
-
             flowPanel.Controls.Add(CreateAppCard(
                 "Mem Reduct",
                 "https://memreduct.org/files/memreduct-3.5.2-setup.exe",
@@ -371,11 +456,6 @@ namespace AppStore
                 "https://ghproxy.net/https://github.com/microsoft/TypeScript/releases/download/v5.8.3/typescript-5.8.3.tgz",
                 ""));
 
-            flowPanel.Controls.Add(CreateAppCard(
-                "peazip",
-                "https://ghproxy.net/https://github.com/peazip/PeaZip/releases/download/10.4.0/peazip-10.4.0.WIN64.exe",
-                "img/jpg/peazip.jpg"));
-
             flowPanel.Controls.Add(CreateAppCard(
                 "Gimp",
                 "https://mirror.nju.edu.cn/gimp/gimp/v3.0/windows/gimp-3.0.4-setup.exe",
@@ -625,21 +705,6 @@ namespace AppStore
                 "Ditto",
                 "https://ghproxy.net/https://github.com/sabrogden/Ditto/releases/download/3.24.246.0/DittoSetup_64bit_3_24_246_0.exe",
                 "img/png/Ditto.png"));
-
-            flowPanel.Controls.Add(CreateAppCard(
-                "XDM",
-                "https://github.com/subhra74/xdm/releases/download/7.2.11/xdm-setup.msi",
-                "img/png/XDM.png"));
-
-            flowPanel.Controls.Add(CreateAppCard(
-                "FDM",
-                "https://files2.freedownloadmanager.org/6/latest/fdm_x64_setup.exe",
-                "img/png/FDM.png"));
-
-            flowPanel.Controls.Add(CreateAppCard(
-                "ABDM",
-                "https://ghproxy.net/https://github.com/amir1376/ab-download-manager/releases/download/v1.6.4/ABDownloadManager_1.6.4_windows_x64.exe",
-                "img/png/ABDM.png"));
         }
 
         private FlowLayoutPanel downloadsFlowPanel = new FlowLayoutPanel();