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配置文件的读取

在AutoCAD插件开发中，可能需要生成、修改、读取配置文件中一些参数或设置。JSON格式的配置文件易于编写和修改，且可以方便地反序列化为对象进行使用。

运行后效果如下

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Runtime;
using Newtonsoft.Json;
using System;
using System.IO;
using Path = System.IO.Path;
// AutoCAD 命令示例
public class ConfigCommands
{[CommandMethod("xx")]public void 加载文件配置(){Document doc = Application.DocumentManager.MdiActiveDocument;Editor ed = doc.Editor;// 加载配置AppConfig config = ConfigManager.LoadConfig();// 应用配置到图纸ConfigManager.ApplyConfigToDrawing(config);ed.WriteMessage($"\n已加载配置：默认图层 {config.DefaultLayer}");}[CommandMethod("tt")]public void 修改文件配置(){Document doc = Application.DocumentManager.MdiActiveDocument;Editor ed = doc.Editor;// 获取当前配置AppConfig config = ConfigManager.LoadConfig();// 修改配置示例config.DefaultLayer = "MyNewLayer";config.DefaultLineWeight = 0.5;// 保存配置ConfigManager.SaveConfig(config);ed.WriteMessage("\n配置已更新并保存");}
}
// 配置文件数据结构（示例）
public class AppConfig
{public string DefaultLayer { get; set; } = "0";      // 默认图层public double DefaultLineWeight { get; set; } = 0.3; // 默认线宽（毫米）public string[] RecentFiles { get; set; }            // 最近打开文件记录public ColorSetting Colors { get; set; }             // 颜色配置
}public class ColorSetting
{public int Background { get; set; } = 16777215;     // 背景色（RGB白色）public int SelectionHighlight { get; set; } = 255;   // 选择高亮色（红色）
}public static class ConfigManager
{private static readonly string ConfigPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),"MyAutoCADPlugin","config.json");/// <summary>/// 加载配置文件/// </summary>public static AppConfig LoadConfig(){try{// 如果配置文件不存在，创建默认配置if (!File.Exists(ConfigPath)){var defaultConfig = new AppConfig();SaveConfig(defaultConfig);return defaultConfig;}// 读取并反序列化JSONstring json = File.ReadAllText(ConfigPath);return JsonConvert.DeserializeObject<AppConfig>(json);}catch (Exception ex){Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage($"\n配置加载失败: {ex.Message}");return new AppConfig(); // 返回空配置}}/// <summary>/// 保存配置文件/// </summary>public static void SaveConfig(AppConfig config){try{// 确保目录存在Directory.CreateDirectory(Path.GetDirectoryName(ConfigPath));// 序列化并保存string json = JsonConvert.SerializeObject(config, Formatting.Indented);File.WriteAllText(ConfigPath, json);}catch (Exception ex){Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage($"\n配置保存失败: {ex.Message}");}}/// <summary>/// 应用配置到当前图纸/// </summary>public static void ApplyConfigToDrawing(AppConfig config){Database db = HostApplicationServices.WorkingDatabase;using (Transaction tr = db.TransactionManager.StartTransaction()){try{// 获取层表LayerTable lt = tr.GetObject(db.LayerTableId, OpenMode.ForRead) as LayerTable;// 检查默认图层是否存在if (!lt.Has(config.DefaultLayer)){// 创建新图层LayerTableRecord ltr = new LayerTableRecord{Name = config.DefaultLayer,LineWeight = LineWeight.LineWeight030};lt.UpgradeOpen();lt.Add(ltr);tr.AddNewlyCreatedDBObject(ltr, true);}// 设置当前图层db.Clayer = lt[config.DefaultLayer];tr.Commit();}catch (Exception ex){tr.Abort();Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage($"\n配置应用失败: {ex.Message}");}}}
}