本文实例讲述了C#监控文件夹并自动给图片文件打水印的方法。分享给大家供大家参考。具体分析如下：

个人私心的缘故，经常写一些博客之类的文章，由于看到网络上面好多同志转载后不标明出处，所以特地写了这么一个小程序，这个小程序的功能是当我在页面上通过QQ截图之后，把截到的图片保存到一个指定的路径，然后工具自动帮我把图片上面加上水印。

下面是全部代码：

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO; namespace FolderWatcher { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private static string text = "http://www.cnblogs.com/zhuzhenyu"; private static string path = @"E:FolderWatcher"; private void button1_Click(object sender, EventArgs e) { if (!string.IsNullOrEmpty(this.textBox1.Text)) { path = this.textBox1.Text; } if (!string.IsNullOrEmpty(this.textBox2.Text)) { text = this.textBox2.Text; } WatcherStrat(path, "*.*"); } private static void WatcherStrat(string path, string filter) { FileSystemWatcher watcher = new FileSystemWatcher(); watcher.Path = path; watcher.Filter = filter; watcher.Created += new FileSystemEventHandler(OnProcess); watcher.EnableRaisingEvents = true; watcher.NotifyFilter = NotifyFilters.Attributes | NotifyFilters.CreationTime | NotifyFilters.DirectoryName | NotifyFilters.FileName | NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.Security | NotifyFilters.Size; watcher.IncludeSubdirectories = true; } private static void OnProcess(object source, FileSystemEventArgs e) { if (e.ChangeType == WatcherChangeTypes.Created) { OnCreated(source, e); } } private static void OnCreated(object source, FileSystemEventArgs e) { if (e.FullPath.IndexOf("_new.") < 0) { FinePic(e.FullPath, text, e.FullPath.Replace(".", "_new."), new Font("宋体", 15, FontStyle.Bold)); } } /// <summary> /// 图片水印 /// </summary> /// <param name="FileName">源文件路径</param> /// <param name="wText">水印文字</param> /// <param name="savePath">保存路径</param> /// <param name="font">字体样式</param> public static void FinePic(string FileName, string wText, string savePath, Font font) { Bitmap bmp = new Bitmap(FileName); System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bmp); g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; g.DrawString(wText, font, new SolidBrush(Color.FromArgb(70, Color.Red)), 60, bmp.Height - 120);//加水印 bmp.Save(savePath, System.Drawing.Imaging.ImageFormat.Jpeg); } } }

来看一下效果

这里的代码非常简单，大家不要喷我

我是一只辛勤耕耘的蚂蚁

希望本文所述对大家的C#程序设计有所帮助。