win7自动壁纸切换小工具AutoDesk一：初始化托盘

win7的自带主题自动切换壁纸的功能挺不错，美中不足的是图片只能放本地，我一千多张背景图片占了不少磁盘空间，遂萌生写一个类似的自动切换软件，图片则从网上下载。

计划工具分两部分，一是本地切换部分，一是网上下载部分。先说本地切换部分。

本地切换部分，要实现的功能包括：初始化托盘，手动切换，定时切换，开机自启动等功能。

一，初始化托盘

这个功能博客园有很多文章，大家可以参考。基本上实现的功能包括，初始化时最小化到托盘，实现托盘右键菜单功能，双击显示主界面。

托盘的菜单如下图：

主界面就是“下一个”按钮。

拖动notifyicon控件到主窗体，拖动菜单到主窗体，设置notifyicon的菜单项为床窗体菜单。

窗体实现部分如下：

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 
 10 using System.Runtime.InteropServices;
 11 using Microsoft.Win32;
 12 using System.IO;
 13 
 14 namespace AutoDesk
 15 {
 16     public partial class AutoDesk : Form
 17     {
 18         // 存放壁纸的文件位置
 19         private string m_deskpick_path = "E:\\deskPic";
 20         private string m_pick_name = "3.jpg";
 21         // 记录快捷键的键码
 22         private int Hotkey1;
 23         // 记录是否关闭窗体。
 24         private DialogResult m_dialogResult = DialogResult.No;
 25 
 26 
 27         public AutoDesk()
 28         {
 29             InitializeComponent();
 30             
 31         }
 32 
 33         /// <summary>
 34         /// 从m_deskpick_path文件夹中随即选取一个文件
 35         /// </summary>
 36         /// <returns></returns>
 37         private string get_random_pick_name()
 38         {
 39             Random random = new Random(Environment.TickCount);
 40             string pick_name = "3.jpg";
 41             DirectoryInfo dInfo = new DirectoryInfo(m_deskpick_path);
 42             FileInfo[] files = dInfo.GetFiles();//"*.jpg|*.gif|*.png|*.bmp");
 43             if (files != null && files.Length > 0)
 44             {
 45                 int index = random.Next(0, files.Length);
 46                 pick_name = files[index].Name;
 47             }
 48             return pick_name;
 49         }
 50 
 51         /// <summary>
 52         /// 通过IActiveDesktop接口切换桌面，
 53         /// IActiveDesktop接口切换桌面具有win7的渐变效果（fade effect或者称为slideshow）
 54         /// 而通过SystemParametersInfo函数也能实现切换壁纸，但是没有渐变效果。
 55         /// 
 56         /// </summary>
 57         private void switch_to_next_waller()
 58         {
 59             string strSavePath = Path.Combine(m_deskpick_path, get_random_pick_name());
 60             //WinAPI.SystemParametersInfo(20, 1, strSavePath, 1);
 61             IActiveDesktop iad = shlobj.GetActiveDesktop();
 62             iad.SetWallpaper(strSavePath, 0);
 63             iad.ApplyChanges(AD_Apply.ALL | AD_Apply.FORCE | AD_Apply.BUFFERED_REFRESH);
 64             System.Runtime.InteropServices.Marshal.ReleaseComObject(iad);
 65         }
 66 
 67         /// <summary>
 68         /// 主界面切换下一桌面的实现。
 69         /// </summary>
 70         /// <param name="sender"></param>
 71         /// <param name="e"></param>
 72         private void btn_center_Click(object sender, EventArgs e)
 73         {
 74             try
 75             {
 76                 switch_to_next_waller();
 77             }
 78             catch (Exception ex)
 79             {
 80                 MessageBox.Show(ex.Message);
 81             }
 82         }
 83 
 84         /// <summary>
 85         /// 最小化到托盘，要实现初始化到托盘，需要设置窗体的初始状态为最小化。
 86         /// </summary>
 87         /// <param name="sender"></param>
 88         /// <param name="e"></param>
 89         private void AutoDesk_SizeChanged(object sender, EventArgs e)
 90         {
 91             try
 92             {
 93                 if (this.WindowState == FormWindowState.Minimized)
 94                 {
 95                     this.Hide();
 96                     this.notifyIcon1.Visible = true;
 97                 }
 98             }
 99             catch (Exception ex)
100             {
101                 MessageBox.Show(ex.Message);
102             }
103         }
104 
105         /// <summary>
106         /// 
107         /// </summary>
108         /// <param name="sender"></param>
109         /// <param name="e"></param>
110         private void notifyIcon1_Click(object sender, EventArgs e)
111         {
112             try
113             {
114                 //this.Visible = true;
115                 //this.WindowState = FormWindowState.Normal;
116                 //this.notifyIcon1.Visible = false; 
117             }
118             catch (Exception ex)
119             {
120                 MessageBox.Show(ex.Message);
121             }
122         }
123 
124         /// <summary>
125         /// 菜单项实现切换到下一桌面
126         /// </summary>
127         /// <param name="sender"></param>
128         /// <param name="e"></param>
129         private void NextToolStripMenuItem_Click(object sender, EventArgs e)
130         {
131             try
132             {
133                 switch_to_next_waller();
134             }
135             catch (Exception ex)
136             {
137                 MessageBox.Show(ex.Message);
138             }
139 
140         }
141 
142         /// <summary>
143         /// 菜单项退出应用程序
144         /// </summary>
145         /// <param name="sender"></param>
146         /// <param name="e"></param>
147         private void exitToolStripMenuItem_Click(object sender, EventArgs e)
148         {
149             try
150             {
151                 m_dialogResult = System.Windows.Forms.DialogResult.Yes;
152                 this.Close();
153             }
154             catch (Exception ex)
155             {
156                 MessageBox.Show(ex.Message);
157             }
158         }
159 
160         /// <summary>
161         /// 菜单项显示主界面
162         /// </summary>
163         /// <param name="sender"></param>
164         /// <param name="e"></param>
165         private void showMainFrmToolStripMenuItem_Click(object sender, EventArgs e)
166         {
167             try
168             {
169                 this.Visible = true;
170                 this.WindowState = FormWindowState.Normal;
171                 
172             }
173             catch (Exception ex)
174             {
175                 MessageBox.Show(ex.Message);
176             }
177         }
178 
179         /// <summary>
180         /// 窗体关闭相应事件。如果是点击窗体的关闭按钮，则只是隐藏。
181         /// </summary>
182         /// <param name="sender"></param>
183         /// <param name="e"></param>
184         private void AutoDesk_FormClosing(object sender, FormClosingEventArgs e)
185         {
186             try
187             {
188                 if (m_dialogResult == System.Windows.Forms.DialogResult.Yes)
189                 {
190                     e.Cancel = false;
191                     Application.Exit();
192                 }
193                 else
194                 {
195                     e.Cancel = true;
196                     this.Hide();
197                 }
198             }
199             catch (Exception ex)
200             {
201                 MessageBox.Show(ex.Message);
202             }
203         }
204 
205         /// <summary>
206         /// 窗体启动时挂载全局快捷键Ctrl+F1.
207         /// </summary>
208         /// <param name="sender"></param>
209         /// <param name="e"></param>
210         private void AutoDesk_Load(object sender, EventArgs e)
211         {
212             try
213             {
214                 
215                  SystemHotKey.Hotkey hotkey;
216                  hotkey = new SystemHotKey.Hotkey(this.Handle);  
217        
218                  //定义快键(Ctrl + F1)  
219                  Hotkey1 = hotkey.RegisterHotkey(System.Windows.Forms.Keys.F1, SystemHotKey.Hotkey.KeyFlags.MOD_CONTROL);
220                  hotkey.OnHotkey += new SystemHotKey.HotkeyEventHandler(OnHotkey);
221 
222             }
223             catch (Exception ex)
224             {
225                 MessageBox.Show(ex.Message);
226             }
227         }
228 
229         /// <summary>
230         /// 快捷键按下后切换到下一个随即壁纸。
231         /// </summary>
232         /// <param name="HotkeyID"></param>
233          public void OnHotkey(int HotkeyID)  
234          {
235              try
236              {
237                  if (HotkeyID == Hotkey1)
238                  {
239                      switch_to_next_waller();
240                  }
241                  else
242                  {
243                      //this.Visible = false;  
244                  }
245              }
246              catch (Exception ex)
247              {
248                  MessageBox.Show(ex.Message);
249              }
250          }  
251 
252         /// <summary>
253         /// 托盘双击显示主界面
254         /// </summary>
255         /// <param name="sender"></param>
256         /// <param name="e"></param>
257         private void notifyIcon1_DoubleClick(object sender, EventArgs e)
258         {
259             try
260             {
261                 this.Visible = true;
262                 this.WindowState = FormWindowState.Normal;
263             }
264             catch (Exception ex)
265             {
266                 MessageBox.Show(ex.Message);
267             }
268         }
269     }
270 }
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原文地址：https://www.cnblogs.com/linbirg/p/2578477.html