From 1539c665f0a210fa9b80b3ddd489f4506af1a457 Mon Sep 17 00:00:00 2001
From: zsyg <3872006562@qq.com>
Date: Wed, 2 Jul 2025 09:15:43 +0800
Subject: [PATCH] =?UTF-8?q?=E6=8F=90=E4=BE=9B=E4=BB=A3=E7=A0=81=E8=B4=A8?=
 =?UTF-8?q?=E9=87=8F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 AppCard.cs         | 10 ++++++++--
 DownloadManager.cs | 17 +++++++++++++----
 ThemeManager.cs    |  2 ++
 3 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/AppCard.cs b/AppCard.cs
index eef218f..7d522a7 100644
--- a/AppCard.cs
+++ b/AppCard.cs
@@ -347,8 +347,14 @@ namespace AppStore
 
         public void UpdateDisplay()
         {
-            nameLabel.Text = AppName;
-            iconBox.Image = AppIcon;
+            if (nameLabel != null)
+            {
+                nameLabel.Text = AppName;
+            }
+            if (iconBox != null && AppIcon != null)
+            {
+                iconBox.Image = AppIcon;
+            }
         }
 
         private void DownloadBtn_Click(object sender, EventArgs e)
diff --git a/DownloadManager.cs b/DownloadManager.cs
index 912b2be..e1f3c2b 100644
--- a/DownloadManager.cs
+++ b/DownloadManager.cs
@@ -101,11 +101,12 @@ namespace AppStore
                         throw new Exception("无法获取下载文件夹路径");
                     }
                     
-                    downloadsDir = Marshal.PtrToStringUni(pathPtr);
+                    downloadsDir = Marshal.PtrToStringUni(pathPtr) ?? 
+                        Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads");
                 }
                 catch 
                 {
-                    throw new Exception("无法确定下载文件夹位置，请手动指定下载路径");
+                    downloadsDir = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads");
                 }
                 finally
                 {
@@ -114,7 +115,15 @@ namespace AppStore
                         Marshal.FreeCoTaskMem(pathPtr);
                     }
                 }
-                Directory.CreateDirectory(downloadsDir);
+                
+                if (!string.IsNullOrEmpty(downloadsDir))
+                {
+                    Directory.CreateDirectory(downloadsDir);
+                }
+                else
+                {
+                    throw new Exception("无法确定下载文件夹位置");
+                }
                 
 
 
@@ -322,7 +331,7 @@ namespace AppStore
             try
             {
                 var process = currentProcess;
-                if (process == null || process.HasExited || process.StartInfo == null)
+                if (process?.StartInfo == null || process.HasExited)
                 {
                     item.Status = "已取消";
                     DownloadProgressChanged?.Invoke(item);
diff --git a/ThemeManager.cs b/ThemeManager.cs
index f9b7e1d..cb45330 100644
--- a/ThemeManager.cs
+++ b/ThemeManager.cs
@@ -42,6 +42,8 @@ namespace AppStore
             try
             {
                 var dir = Path.GetDirectoryName(ThemeConfigPath);
+                if (dir == null) return;
+                
                 if (!Directory.Exists(dir))
                 {
                     Directory.CreateDirectory(dir);