实例介绍
【实例简介】
【实例截图】
加水印后的效果(右下角的喜字即为水印图片)
【核心代码】
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Threading; using System.IO; using 图片加水印工具.BLL; namespace 图片加水印工具 { public partial class Form1 : Form { List<string> listExtention = new List<string>(); public Form1() { InitializeComponent(); Form.CheckForIllegalCrossThreadCalls = false; listExtention.AddRange(new string[] { ".jpg", ".gif", ".png" }); ConfigFile.Instanse.fileName = AppDomain.CurrentDomain.BaseDirectory "图片加水印工具.ini"; } private void Form1_FormClosed(object sender, FormClosedEventArgs e) { Application.Exit(); Application.ExitThread(); } #region 在新线程中运行函数 /// <summary> /// 在新线程中运行函数 /// </summary> /// <param name="func">传入 函数名(无参、无返回值)</param> /// <param name="IsBackground">是否为后台线程(后台线程,窗口关闭后就终止线程)</param> public static void ThreadNew(VoidFunction func, bool IsBackground) { Thread th1 = new Thread(new ThreadStart(func)); th1.IsBackground = IsBackground;//后台线程,窗口关闭后就终止线程 th1.Start(); } /// <summary> /// 在新线程中运行函数 /// </summary> /// <param name="func">传入 函数名(有一个参数、无返回值)</param> /// <param name="para">object参数</param> /// <param name="IsBackground">是否为后台线程(后台线程,窗口关闭后就终止线程)</param> public static Thread ThreadNew(ParamFunction func, object para, bool IsBackground) { Thread th1 = new Thread(new ParameterizedThreadStart(func)); //判断状态 //((int)th1.ThreadState &((int)ThreadState.Running | (int)ThreadState.Suspended) ) == 0 th1.IsBackground = IsBackground; th1.Start(para); return th1; } /// <summary> /// 允许线程之间进行操作 /// </summary> public static void OprateBetweenThread() { System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false; } /// <summary> /// 无参的、返回值为void的委托,可以用来做参数名 /// </summary> public delegate void VoidFunction(); /// <summary> /// 有一个参数的、返回值为void的委托,可以用来做参数名 /// </summary> public delegate void ParamFunction(object para); #endregion private void lb_selectDir_Click(object sender, EventArgs e) { FolderBrowserDialog fbd = new FolderBrowserDialog(); if (fbd.ShowDialog() == DialogResult.OK) { txtDir.Text = fbd.SelectedPath; ConfigFile.Instanse["txtDir"] = txtDir.Text; } } private void lb_selectMark_Click(object sender, EventArgs e) { OpenFileDialog ofd = new OpenFileDialog(); //设置文件类型 ofd.Filter = "png(*.png)|*.png|jpg(*.jpg)|*.jpg|gif(*.gif)|*.gif"; //设置默认文件类型显示顺序 ofd.FilterIndex = 1; //保存对话框是否记忆上次打开的目录 ofd.RestoreDirectory = true; //点了保存按钮进入 if (ofd.ShowDialog() == DialogResult.OK) { txtMark.Text = ofd.FileName.ToString(); ConfigFile.Instanse["txtMark"]=txtMark.Text; } } int success = 0; //成功 int falure = 0; //失败 int total = 0; private void MakeWaterMark() { success = 0; falure = 0; total = 0; string errmsg = ""; string markPicPath = txtMark.Text.Trim(); string strtxtDir = txtDir.Text.Trim(); if (strtxtDir == "" || markPicPath == "") { MessageBox.Show("请选择目录和水印文件!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Stop); } else if (Directory.Exists(strtxtDir) == false) { MessageBox.Show("文件夹不存在!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Stop); } else { btnExec.Enabled = false; List<string> PictureList = new List<string>(); lb_statusInfo.Text = "状态:正在检索图片…"; SearchFile(txtDir.Text.Trim(), ref PictureList); foreach (string s in PictureList) { try { MakeWaterPic(s, "", markPicPath, ""); success ; } catch (Exception er) { falure ; errmsg = er.Message; } total ; lb_statusInfo.Text = "状态:正在为第" (total 1) "张图片加水印…"; } lb_statusInfo.Text = "状态:完成!共" total ",成功" success ",失败" falure; btnExec.Enabled = true; if (errmsg != "") MessageBox.Show(errmsg, "执行完成,部分文件出错信息", MessageBoxButtons.OK, MessageBoxIcon.Information); } } public void SearchFile(string parentDir, ref List<string> PictureList) { try { string[] subFiles = Directory.GetFiles(parentDir); string[] subDirs = Directory.GetDirectories(parentDir, "*.*", SearchOption.TopDirectoryOnly); PictureList.AddRange(subFiles); foreach (string dir in subDirs) { SearchFile(dir, ref PictureList); } } catch (Exception ex) { } } private string MakeWaterPic(string SourcePicPath, string WaterText, string WaterPath, string SaveName) { if (File.Exists(SourcePicPath) == false) { return "-1";//文件不存在 } string extension = Path.GetExtension(SourcePicPath).ToLower();//后缀 if (listExtention.Contains(extension) == false) throw new Exception("不允许的后缀:" SourcePicPath "\n"); string fileName = ""; if (SaveName.Trim() != "") fileName = SaveName; else fileName = DateTime.Now.ToString("yyyy-MM-dd_hhmmssfff"); //加文字水印 System.Drawing.Image image = System.Drawing.Image.FromFile(SourcePicPath, true); int imgwidth = image.Width; int imgheight = image.Height; using (System.Drawing.Bitmap bitmap = new Bitmap(image.Width, image.Height)) { using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap))// { g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; g.Clear(System.Drawing.Color.Transparent); g.DrawImage(image, 0, 0, imgwidth, imgheight);//画上原图片 image.Dispose(); //g.DrawImage(image, 0, 0, image.Width, image.Height); if (WaterText != "") { Font f = new Font("Verdana", 32); Brush b = new SolidBrush(Color.Yellow); g.DrawString(WaterText, f, b, 10, 10); } //g.Dispose(); //加图片水印 System.Drawing.Image copyImage = System.Drawing.Image.FromFile(WaterPath); g.DrawImage(copyImage, new Rectangle(imgwidth - copyImage.Width, imgheight - copyImage.Height, copyImage.Width, copyImage.Height), 0, 0, copyImage.Width, copyImage.Height, GraphicsUnit.Pixel); if (File.Exists(SourcePicPath)) { File.Delete(SourcePicPath); } //保存加水印过后的图片,删除原始图片 // string newPath = fileName extension; switch (extension) { case ".jpg": bitmap.Save(SourcePicPath, System.Drawing.Imaging.ImageFormat.Jpeg); break; case ".gif": bitmap.Save(SourcePicPath, System.Drawing.Imaging.ImageFormat.Gif); break; case ".png": bitmap.Save(SourcePicPath, System.Drawing.Imaging.ImageFormat.Png); break; default: throw new Exception("不允许的后缀:" SourcePicPath); } } } return "1"; // Response.Redirect(newPath); //} } private void btnExec_Click(object sender, EventArgs e) { ThreadNew(MakeWaterMark, true); } private void Form1_Load(object sender, EventArgs e) { txtDir.Text = ConfigFile.Instanse["txtDir"]; txtMark.Text = ConfigFile.Instanse["txtMark"]; } } }
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