允许自定义下载路径

SettingsForm.cs

@@ -3,6 +3,7 @@ using System.Diagnostics;
 using System.IO;
 using System.Windows.Forms;
 using System.Drawing;
+using System.Text.Json;
 
 namespace AppStore
 {
@@ -49,7 +50,43 @@ namespace AppStore
             btnCleanLogs.Click += (s, e) => CleanLogs();
             this.Controls.Add(btnCleanLogs);
 
+            // 下载路径设置
+            Label lblDownloadPath = new Label();
+            lblDownloadPath.Text = "下载路径:";
+            lblDownloadPath.AutoSize = true;
+            lblDownloadPath.Location = new Point((this.Width - 300) / 2, 170);
+            lblDownloadPath.Font = new Font("Microsoft YaHei", 10);
+            lblDownloadPath.Anchor = AnchorStyles.Top;
+            this.Controls.Add(lblDownloadPath);
+
+            TextBox txtDownloadPath = new TextBox();
+            txtDownloadPath.Size = new Size(300, 30);
+            txtDownloadPath.Location = new Point((this.Width - 300) / 2, 200);
+            txtDownloadPath.Font = new Font("Microsoft YaHei", 10);
+            txtDownloadPath.Anchor = AnchorStyles.Top;
+            txtDownloadPath.ReadOnly = true;
+            this.Controls.Add(txtDownloadPath);
+
+            Button btnBrowse = new Button();
+            btnBrowse.Text = "浏览...";
+            btnBrowse.Size = new Size(80, 30);
+            btnBrowse.Location = new Point(txtDownloadPath.Right + 10, 200);
+            btnBrowse.Font = new Font("Microsoft YaHei", 10);
+            btnBrowse.Anchor = AnchorStyles.Top;
+            btnBrowse.Click += (s, e) => BrowseDownloadPath(txtDownloadPath);
+            this.Controls.Add(btnBrowse);
+
+            Button btnSavePath = new Button();
+            btnSavePath.Text = "保存路径";
+            btnSavePath.Size = new Size(100, 30);
+            btnSavePath.Location = new Point((this.Width - 100) / 2, 240);
+            btnSavePath.Font = new Font("Microsoft YaHei", 10);
+            btnSavePath.Anchor = AnchorStyles.Top;
+            btnSavePath.Click += (s, e) => SaveDownloadPath(txtDownloadPath.Text);
+            this.Controls.Add(btnSavePath);
+
             ThemeManager.ThemeChanged += OnThemeChanged;
+            LoadDownloadPath(txtDownloadPath);
         }
 
         private void SwitchTheme(ThemeManager.ThemeMode theme)
@@ -84,5 +121,103 @@ namespace AppStore
                 MessageBox.Show($"清理日志时出错: {ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
             }
         }
+
+        private void BrowseDownloadPath(TextBox txtBox)
+        {
+            using (FolderBrowserDialog dialog = new FolderBrowserDialog())
+            {
+                dialog.Description = "选择下载路径";
+                if (dialog.ShowDialog() == DialogResult.OK)
+                {
+                    txtBox.Text = dialog.SelectedPath;
+                }
+            }
+        }
+
+        private void SaveDownloadPath(string path)
+        {
+            try
+            {
+                // 验证路径
+                if (string.IsNullOrWhiteSpace(path))
+                {
+                    MessageBox.Show("下载路径不能为空", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return;
+                }
+
+                // 尝试创建目录（如果不存在）
+                try
+                {
+                    Directory.CreateDirectory(path);
+                    
+                    // 验证目录是否可写
+                    string testFile = Path.Combine(path, "write_test.tmp");
+                    File.WriteAllText(testFile, "test");
+                    File.Delete(testFile);
+                }
+                catch
+                {
+                    MessageBox.Show($"无法访问路径: {path}\n请确保路径存在且有写入权限", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return;
+                }
+
+                // 保存路径
+                string dlPathDir = Path.Combine(
+                    Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
+                    "zsyg", "kortapp-z", ".date", "dl_path");
+                
+                if (!Directory.Exists(dlPathDir))
+                {
+                    Directory.CreateDirectory(dlPathDir);
+                }
+
+                string jsonPath = Path.Combine(dlPathDir, "download_path.json");
+                var jsonData = new { DownloadPath = path };
+                string jsonString = JsonSerializer.Serialize(jsonData);
+                
+                File.WriteAllText(jsonPath, jsonString);
+                
+                MessageBox.Show($"下载路径已保存到:\n{path}", "成功", MessageBoxButtons.OK, MessageBoxIcon.Information);
+            }
+            catch (Exception ex)
+            {
+                Logger.LogError("保存下载路径时出错", ex);
+                MessageBox.Show($"保存下载路径时出错: {ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void LoadDownloadPath(TextBox txtBox)
+        {
+            // 默认下载路径为用户文件夹下的Downloads
+            string defaultPath = Path.Combine(
+                Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), 
+                "Downloads");
+
+            try
+            {
+                string jsonPath = Path.Combine(
+                    Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
+                    "zsyg", "kortapp-z", ".date", "dl_path", "download_path.json");
+                
+                if (File.Exists(jsonPath))
+                {
+                    string jsonString = File.ReadAllText(jsonPath);
+                    var jsonData = JsonSerializer.Deserialize<JsonElement>(jsonString);
+                    string customPath = jsonData.GetProperty("DownloadPath").GetString();
+                    
+                    // 如果自定义路径有效则显示，否则显示默认路径
+                    txtBox.Text = !string.IsNullOrWhiteSpace(customPath) ? customPath : defaultPath;
+                }
+                else
+                {
+                    txtBox.Text = defaultPath;
+                }
+            }
+            catch (Exception ex)
+            {
+                Logger.LogError("加载下载路径时出错", ex);
+                txtBox.Text = defaultPath;
+            }
+        }
     }
 }