给图片添加水印代码,CSharp代码库,德仔网

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【CSharp】给图片添加水印
作者:today / 发布于2013/6/17/ 630

	using System;
	using System.Collections.Generic;
	using System.ComponentModel;
	using System.Data;
	using System.Drawing;
	using System.Drawing.Drawing2D;
	using System.Drawing.Imaging;
	using System.Linq;
	using System.Text;
	using System.Windows.Forms;
	using System.IO;

	namespace MarkPicWithFileName
	{
	 public partial class Form1 : Form
	 {
	 public Form1()
	 {
	 InitializeComponent();
	 }

	 private void button1_Click(object sender, EventArgs e)
	 {
	 DirectoryInfo dic = new DirectoryInfo(@"C:\Users\kerry\Desktop\handbag");
	 FileInfo[] files = dic.GetFiles();
	 foreach (FileInfo f in files)
	 {
	 Image img = Image.FromFile(f.FullName);
	 string newFileName=@"C:\Users\kerry\Desktop\handbag\new\" + f.Name;
	 Utils.AddImageSignText(img, newFileName, f.Name.Replace(".JPG", string.Empty).Replace(".jpg", string.Empty), 1, 100, "微软雅黑", 24);
	
	 //Utils .AddImageSignText (
	 }
	 }

	 }

	 public class Utils
	 {
	 /// <summary>
	 /// 增加图片文字水印
	 /// </summary>
	 /// <param name="filename">文件名</param>
	 /// <param name="watermarkText">水印文字</param>
	 /// <param name="watermarkStatus">图片水印位置</param>
	 public static void AddImageSignText(Image img, string filename, string watermarkText, int watermarkStatus, int quality, string fontname, int fontsize)
	 {
	 //System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(img);
	 // .FromFile(filename);
	 Graphics g = Graphics.FromImage(img);
	 Font drawFont = new Font(fontname, fontsize, FontStyle.Regular, GraphicsUnit.Pixel);
	 SizeF crSize;
	 crSize = g.MeasureString(watermarkText, drawFont);

	 float xpos = 0;
	 float ypos = 0;

	 switch (watermarkStatus)
	 {
	 case 1:
	 xpos = (float)img.Width * (float).01;
	 ypos = (float)img.Height * (float).01;
	 break;
	 case 2:
	 xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
	 ypos = (float)img.Height * (float).01;
	 break;
	 case 3:
	 xpos = ((float)img.Width * (float).99) - crSize.Width;
	 ypos = (float)img.Height * (float).01;
	 break;
	 case 4:
	 xpos = (float)img.Width * (float).01;
	 ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
	 break;
	 case 5:
	 xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
	 ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
	 break;
	 case 6:
	 xpos = ((float)img.Width * (float).99) - crSize.Width;
	 ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
	 break;
	 case 7:
	 xpos = (float)img.Width * (float).01;
	 ypos = ((float)img.Height * (float).99) - crSize.Height;
	 break;
	 case 8:
	 xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
	 ypos = ((float)img.Height * (float).99) - crSize.Height;
	 break;
	 case 9:
	 xpos = ((float)img.Width * (float).99) - crSize.Width;
	 ypos = ((float)img.Height * (float).99) - crSize.Height;
	 break;
	 }

	 // System.Drawing.StringFormat StrFormat = new System.Drawing.StringFormat();
	 // StrFormat.Alignment = System.Drawing.StringAlignment.Center;
	 //
	 // g.DrawString(watermarkText, drawFont, new System.Drawing.SolidBrush(System.Drawing.Color.White), xpos + 1, ypos + 1, StrFormat);
	 // g.DrawString(watermarkText, drawFont, new System.Drawing.SolidBrush(System.Drawing.Color.Black), xpos, ypos, StrFormat);
	 g.DrawString(watermarkText, drawFont, new SolidBrush(Color.White), xpos + 1, ypos + 1);
	 g.DrawString(watermarkText, drawFont, new SolidBrush(Color.Black), xpos, ypos);

	 ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
	 ImageCodecInfo ici = null;
	 foreach (ImageCodecInfo codec in codecs)
	 {
	 if (codec.MimeType.IndexOf("jpeg") > -1)
	 {
	 ici = codec;
	 }
	 }
	 EncoderParameters encoderParams = new EncoderParameters();
	 long[] qualityParam = new long[1];
	 if (quality < 0 || quality > 100)
	 {
	 quality = 80;
	 }
	 qualityParam[0] = quality;

	 EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
	 encoderParams.Param[0] = encoderParam;

	 if (ici != null)
	 {
	 img.Save(filename, ici, encoderParams);
	 }
	 else
	 {
	 img.Save(filename);
	 }
	 g.Dispose();
	 //bmp.Dispose();
	 img.Dispose();
	 }
	
	 }
	}
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