winform壁纸工具：为图片添加当月的日历并设为壁纸

这几天用winform做了一个设置壁纸的小工具，为图片添加当月的日历并设为壁纸，可以手动设置壁纸，也可以定时设置壁纸，最主要的特点是在图片上生成当前月的日历信息。

工具和桌面设置壁纸后的效果如下：

在图片上画日历的类代码Calendar.cs如下：

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.IO;
using System.Drawing.Imaging;namespace SetWallpaper
{public class Calendar{/// <summary>/// 计算星期几: 星期日至星期六的值为0-6/// </summary>public static int GetWeeksOfDate(int year, int month, int day){DateTime dt = new DateTime(year, month, day);DayOfWeek d = dt.DayOfWeek;return Convert.ToInt32(d);}     /// <summary>/// 获取指定年月的天数/// </summary>public static int GetDaysOfMonth(int year, int month){DateTime dtCur = new DateTime(year, month, 1);int days = dtCur.AddMonths(1).AddDays(-1).Day;return days;}/// <summary>/// 获取在图片上生成日历的图片/// </summary>public static Bitmap GetCalendarPic(Image img){Bitmap bmp = new Bitmap(img.Width, img.Height, PixelFormat.Format24bppRgb);bmp.SetResolution(72, 72);using (Graphics g = Graphics.FromImage(bmp)){                g.DrawImage(img, 0, 0, img.Width, img.Height);                              DateTime dtNow = DateTime.Now;int year = dtNow.Year;int month = dtNow.Month;int day = dtNow.Day;int day1st = Calendar.GetWeeksOfDate(year, month, 1); //第一天星期几int days = Calendar.GetDaysOfMonth(year, month); //获取想要输出月份的天数int startX = img.Width / 2; //开始的X轴位置int startY = img.Height / 4; //开始的Y轴位置int posLen = 50; //每次移动的位置长度int x = startX + day1st * posLen; //1号的开始X轴位置int y = startY + posLen * 2;//1号的开始Y轴位置Calendar.DrawStr(g, dtNow.ToString("yyyy年MM月dd日"), startX, startY);string[] weeks = { "日", "一", "二", "三", "四", "五", "六" };for (int i = 0; i < weeks.Length; i++)Calendar.DrawStr(g, weeks[i], startX + posLen * i, startY + posLen);for (int j = 1; j <= days; j++){if (j == day)//如果是今天，设置背景色Calendar.DrawStrToday(g, j.ToString().PadLeft(2, ' '), x, y);elseCalendar.DrawStr(g, j.ToString().PadLeft(2, ' '), x, y);//星期六结束到星期日时换行，X轴回到初始位置，Y轴增加if ((day1st + j) % 7 == 0){x = startX;y = y + posLen;}elsex = x + posLen;}return bmp;}}/// <summary>/// 绘制字符串/// </summary>public static void DrawStr(Graphics g, string s, float x, float y){Font font = new Font("宋体", 25, FontStyle.Bold);PointF pointF = new PointF(x, y);g.DrawString(s, font, new SolidBrush(Color.Yellow), pointF);}/// <summary>/// 绘制有背景颜色的字符串/// </summary>public static void DrawStrToday(Graphics g, string s, float x, float y){Font font = new Font("宋体", 25, FontStyle.Bold);PointF pointF = new PointF(x, y);SizeF sizeF = g.MeasureString(s, font);g.FillRectangle(Brushes.White, new RectangleF(pointF, sizeF));g.DrawString(s, font, Brushes.Black, pointF);}/// <summary>/// 根据图片路径转为Image对象/// </summary>private Image ReturnImage(string imgPath){using (FileStream fs = File.OpenRead(imgPath)){Image img = Image.FromStream(fs);return img;}}}
}

主窗体设置壁纸等的代码FrmMain.cs如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Drawing.Drawing2D;
using Microsoft.Win32;
using System.Collections;
using System.Runtime.InteropServices;
using System.Xml;
using System.Drawing.Imaging;namespace SetWallpaper
{   public partial class FrmMain : Form{[DllImport("user32.dll", CharSet = CharSet.Auto)]public static extern int SystemParametersInfo(int uAction, int uParam, string lpvParam, int fuWinIni);int screenWidth = Screen.PrimaryScreen.Bounds.Width;int screenHeight = Screen.PrimaryScreen.Bounds.Height;          FileInfo[] picFiles;public FrmMain(){InitializeComponent();           }private void FrmMain_Load(object sender, EventArgs e){List<DictionaryEntry> list = new List<DictionaryEntry>(){new DictionaryEntry(1, "居中显示"),new DictionaryEntry(2, "平铺显示"),new DictionaryEntry(3, "拉伸显示")};cbWallpaperStyle.DisplayMember = "Value";cbWallpaperStyle.ValueMember = "Key";cbWallpaperStyle.DataSource = list;txtPicDir.Text = XmlNodeInnerText("");timer1.Tick += new EventHandler(timer_Tick);Text = string.Format("设置桌面壁纸(当前电脑分辨率{0}×{1})", screenWidth, screenHeight);}     /// <summary>/// 浏览单个图片/// </summary>private void btnBrowse_Click(object sender, EventArgs e){using (OpenFileDialog openFileDialog = new OpenFileDialog()){openFileDialog.Filter = "Images (*.BMP;*.JPG)|*.BMP;*.JPG;";openFileDialog.AddExtension = true;openFileDialog.RestoreDirectory = true;if (openFileDialog.ShowDialog() == DialogResult.OK){Bitmap img = (Bitmap)Bitmap.FromFile(openFileDialog.FileName);pictureBox1.Image = img;string msg = (img.Width != screenWidth || img.Height != screenHeight) ? "，建议选择和桌面分辨率一致图片" : "";lblStatus.Text = string.Format("当前图片分辨率{0}×{1}{2}", img.Width, img.Height, msg);}}}/// <summary>/// 手动设置壁纸/// </summary>private void btnSet_Click(object sender, EventArgs e){if (pictureBox1.Image == null){MessageBox.Show("请先选择一张图片。");return;}Image img = pictureBox1.Image;           SetWallpaper(img);}private void SetWallpaper(Image img){Bitmap bmp = Calendar.GetCalendarPic(img);string filename = Application.StartupPath + "/wallpaper.bmp";bmp.Save(filename, ImageFormat.Bmp);string tileWallpaper = "0";string wallpaperStyle = "0";string selVal = cbWallpaperStyle.SelectedValue.ToString();if (selVal == "1")tileWallpaper = "1";else if (selVal == "2")wallpaperStyle = "2";//写到注册表，避免系统重启后失效RegistryKey regKey = Registry.CurrentUser;regKey = regKey.CreateSubKey("Control Panel\\Desktop");//显示方式，居中：0 0， 平铺： 1 0， 拉伸： 0 2regKey.SetValue("TileWallpaper", tileWallpaper);regKey.SetValue("WallpaperStyle", wallpaperStyle);regKey.SetValue("Wallpaper", filename);regKey.Close();SystemParametersInfo(20, 1, filename, 1);}/// <summary>/// 浏览文件夹/// </summary>private void btnBrowseDir_Click(object sender, EventArgs e){string defaultfilePath = XmlNodeInnerText("");using (FolderBrowserDialog dialog = new FolderBrowserDialog()){if (defaultfilePath != "")  dialog.SelectedPath = defaultfilePath;                if (dialog.ShowDialog() == DialogResult.OK)                              XmlNodeInnerText(dialog.SelectedPath);txtPicDir.Text = dialog.SelectedPath;}}       /// <summary>/// 获取或设置配置文件中的选择目录/// </summary>/// <param name="text"></param>/// <returns></returns>public string XmlNodeInnerText(string text){string filename = Application.StartupPath + "/config.xml";XmlDocument doc = new XmlDocument();if (!File.Exists(filename)){XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "UTF-8", null);doc.AppendChild(dec);               XmlElement elem = doc.CreateElement("WallpaperPath");elem.InnerText = text;doc.AppendChild(elem);doc.Save(filename);}else{doc.Load(filename);XmlNode node = doc.SelectSingleNode("//WallpaperPath");if (node != null){if (string.IsNullOrEmpty(text))return node.InnerText;else{node.InnerText = text;doc.Save(filename);}}}return text;}    /// <summary>/// 定时自动设置壁纸/// </summary>private void btnAutoSet_Click(object sender, EventArgs e){string path = txtPicDir.Text;if (!Directory.Exists(path)){MessageBox.Show("选择的文件夹不存在");return;}DirectoryInfo dirInfo = new DirectoryInfo(path);picFiles = dirInfo.GetFiles("*.jpg");if (picFiles.Length == 0){MessageBox.Show("选择的文件夹里面没有图片");return;}if (btnAutoSet.Text == "开始"){timer1.Start();btnAutoSet.Text = "停止";lblStatus.Text = string.Format("定时自动换壁纸中...");            }else{timer1.Stop();btnAutoSet.Text = "开始";lblStatus.Text = "";}}/// <summary>/// 定时随机设置壁纸/// </summary>private void timer_Tick(object sender, EventArgs e){            timer1.Interval = 1000 * 60 * (int)numericUpDown1.Value;FileInfo[] files = picFiles;if (files.Length > 0){Random random = new Random();int r = random.Next(1, files.Length);Bitmap img = (Bitmap)Bitmap.FromFile(files[r].FullName);               pictureBox1.Image = img;SetWallpaper(img);}}/// <summary>/// 双击托盘图标显示窗体/// </summary>private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e){ShowForm();}/// <summary>  /// 隐藏窗体，并显示托盘图标  /// </summary>  private void HideForm(){this.Visible = false;this.WindowState = FormWindowState.Minimized;notifyIcon1.Visible = true;}/// <summary>  /// 显示窗体  /// </summary>  private void ShowForm(){this.Visible = true;this.WindowState = FormWindowState.Normal;notifyIcon1.Visible = false;}private void ToolStripMenuItemShow_Click(object sender, EventArgs e){ShowForm();}/// <summary>  /// 退出  /// </summary>  private void toolStripMenuItemExit_MouseDown(object sender, MouseEventArgs e){
if (MessageBox.Show("您确认要退出吗？", "", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
this.Dispose();//一定要加这行，否则会弹出2次确认框
Application.Exit();
}}/// <summary>  /// 最小化时隐藏窗体，并显示托盘图标 /// </summary>  private void FrmMain_SizeChanged(object sender, EventArgs e){if (this.WindowState == FormWindowState.Minimized){HideForm();}}
private void FrmMain_FormClosing(object sender, FormClosingEventArgs e)
{
if (MessageBox.Show("您确认要退出吗？", "", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
this.Dispose();//一定要加这行，否则会弹出2次确认框
Application.Exit();
}
else
e.Cancel = true;
}}
}

备注：
应用程序最小化图标显示在任务栏并可鼠标右击菜单显示和退出，上面包括了后台代码，前台设计界面的布置如下：
1、双击工具箱 contextMenuStrip 控件，设置如下：
   ①属性Name = "contextMenuStrip1"；
   ②属性Items集合中添加两个MenuItem菜单项：
     菜单1设置Name = "ToolStripMenuItemShow"、Text = "显示"
     菜单2设置Name = "toolStripMenuItemExit"、Text = "退出"
   ③菜单项ToolStripMenuItemShow 关联事件ToolStripMenuItemShow_Click;
   ④菜单项toolStripMenuItemExit 关联事件toolStripMenuItemExit.MouseDown;

2、双击工具箱 notifyIcon 控件，设置如下：
   ①属性ContextMenuStrip = "contextMenuStrip1"
   ②属性Text = "设置桌面壁纸"
   ③属性Icon：选择一个本地图标文件
   ④关联事件notifyIcon1_MouseDoubleClick

完整的项目代码下载：

http://download.csdn.net/detail/gdjlc/5096674

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