实例介绍
【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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