文件：预览的代码.cs
归档时间：2025-12-27 21:20
原始文件：预览的代码.cs
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Drawing;
using System.Collections.Generic;
using Microsoft.Win32;
using Quicker.Public;public class UniversalPreviewer
{public static void Exec(IStepContext context){try{// ================== 修复点 1 ==================// 原错误代码: Quicker.Public.Common.GetSelectedFiles();// 原因: Quicker.Public 命名空间下没有 Common 类。// 修正: 从动作上下文(context)中读取上一步“获取选中的文件”得到的变量。// 请确保你在 C# 脚本前添加了“获取选中的文件”步骤，并将变量名设为 "files"// =============================================var files = context.GetVarValue("files") as List<string>;// ================== 修复点 2 ==================// 原错误: operator '==' cannot be applied to 'method group'// 原因: 之前的错误导致 files 类型不明，或者被误推断为 IEnumerable (需用 .Count())// 修正: 明确转换为 List<string> 后，.Count 属性即可正常使用。// =============================================if (files == null || files.Count == 0) {MessageBox.Show("请先在资源管理器中选中一个文件！");return;}string filePath = files[0];// 2. 创建宿主窗口PreviewForm form = new PreviewForm(filePath);form.ShowDialog(); // 模态显示}catch (Exception ex){MessageBox.Show("预览启动失败: " + ex.Message);}}
}
// ---------------------------------------------------------
// ️ 宿主窗口：假装自己是资源管理器的预览窗格
// ---------------------------------------------------------
public class PreviewForm : Form
{private object _currentHandler; // 保存 COM 对象防止被回收public PreviewForm(string filePath){this.Text = "Quicker 悬浮预览 - " + Path.GetFileName(filePath);this.Size = new Size(800, 600);this.StartPosition = FormStartPosition.CenterScreen;// 核心加载逻辑LoadPreviewHandler(filePath);}private void LoadPreviewHandler(string filename){try{// 1. 根据扩展名找 CLSID (注册表)string ext = Path.GetExtension(filename);if (string.IsNullOrEmpty(ext)) return;// 查找注册表: HKEY_CLASSES_ROOT\.ext\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f}string classId = GetPreviewHandlerCLSID(ext);if (string.IsNullOrEmpty(classId)){Label lbl = new Label() { Text = "该文件类型未注册预览器\n(Preview Handler Not Found)", Dock = DockStyle.Fill, TextAlign = ContentAlignment.MiddleCenter };this.Controls.Add(lbl);return;}// 2. 实例化 COM 对象Type comType = Type.GetTypeFromCLSID(new Guid(classId));_currentHandler = Activator.CreateInstance(comType);// 3. 初始化 (IInitializeWithFile)if (_currentHandler is IInitializeWithFile fileInit){fileInit.Initialize(filename, 0);}// 4. 设置窗口并绘制 (IPreviewHandler)if (_currentHandler is IPreviewHandler previewHandler){// 绑定到当前 FormpreviewHandler.SetWindow(this.Handle, new RECT(this.ClientRectangle));previewHandler.DoPreview(); // 开始绘制！// 响应窗口大小变化this.Resize += (s, e) => {previewHandler.SetRect(new RECT(this.ClientRectangle));};}}catch (Exception ex){Label lbl = new Label() { Text = "预览加载出错:\n" + ex.Message, Dock = DockStyle.Fill, TextAlign = ContentAlignment.MiddleCenter };this.Controls.Add(lbl);}}// 查注册表找 GUIDprivate string GetPreviewHandlerCLSID(string ext){using (var key = Registry.ClassesRoot.OpenSubKey(ext + @"\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f}")){if (key != null) return key.GetValue(null) as string;}return null;}// 清理资源protected override void OnFormClosing(FormClosingEventArgs e){if (_currentHandler != null && _currentHandler is IPreviewHandler ph){ph.Unload();}if (_currentHandler != null){Marshal.FinalReleaseComObject(_currentHandler);_currentHandler = null;}base.OnFormClosing(e);}
}// ---------------------------------------------------------
// COM 接口定义 (这是最硬核的部分，照抄即可)
// ---------------------------------------------------------[ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("8895b1c6-b41f-4c1c-a562-0d564250836f")]
internal interface IPreviewHandler
{void SetWindow(IntPtr hwnd, ref RECT rect);void SetRect(ref RECT rect);void DoPreview();void Unload();void SetFocus();void QueryFocus(out IntPtr phwnd);[PreserveSig] uint TranslateAccelerator(ref Message pmsg);
}[ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("b7d14566-0509-4cce-a71f-0a554233bd9b")]
internal interface IInitializeWithFile
{void Initialize([MarshalAs(UnmanagedType.LPWStr)] string pszFilePath, uint grfMode);
}[StructLayout(LayoutKind.Sequential)]
internal struct RECT
{public int left, top, right, bottom;public RECT(Rectangle r) { left = r.Left; top = r.Top; right = r.Right; bottom = r.Bottom; }
}// 简单的 Message 结构模拟
[StructLayout(LayoutKind.Sequential)]
public struct Message
{public IntPtr hWnd;public uint msg;public IntPtr wParam;public IntPtr lParam;public uint time;public Point p;
}