WEB开发网
开发学院WEB开发ASP.NET 封装的一些实现图片水印与图片自动结合缩放的类 阅读

封装的一些实现图片水印与图片自动结合缩放的类

 2007-01-10 17:21:19 来源:WEB开发网   
核心提示: 1using System; 2using System.Data; 3using System.Configuration; 4using System.Web; 5using System.Web.Security; 6using System.Web.UI; 7using System.Web.U

  1using System;
  2using System.Data;
  3using System.Configuration;
  4using System.Web;
  5using System.Web.Security;
  6using System.Web.UI;
  7using System.Web.UI.WebControls;
  8using System.Web.UI.WebControls.WebParts;
  9using System.Web.UI.HtmlControls;
 10using System.Drawing;
 11namespace WebHelper
 12{
 13
 14   /**//// <summary>
 15   /// ImageHelper 的摘要说明
 16   /// </summary>
 17   public class ImageHelper
 18   {
 19     public ImageHelper()
 20     {
 21       //
 22       // TODO: 在此处添加构造函数逻辑
 23       //
 24     }
 25     Image水印#region Image水印
 26     /**//// <summary>
 27     /// 写入图像水印
 28     /// </summary>
 29     /// <param name="str">水印字符串</param>
 30     /// <param name="filePath">原图片位置</param>
 31     /// <param name="savePath">水印加入后的位置</param>
 32     /// <returns></returns>
 33     public  string CreateBackImage(System.Web.UI.Page pageCurrent, string str, string filePath, string savePath, int x, int y)
 34     {
 35       System.Drawing.Image img = System.Drawing.Image.FromFile(pageCurrent.MapPath(filePath));
 36       //创建图片
 37       Graphics graphics = Graphics.FromImage(img);
 38       //指定要绘制的面积
 39       graphics.DrawImage(img, 0, 0, img.Width, img.Height);
 40       //定义字段和画笔
 41       Font font = new Font("黑体", 16);
 42       Brush brush = new SolidBrush(Color.Yellow);
 43       graphics.DrawString(str, font, brush, x, y);
 44       //保存并输出图片
 45       img.Save(pageCurrent.MapPath(savePath), System.Drawing.Imaging.ImageFormat.Jpeg);
 46       return savePath;
 47
 48     }
 49     #endregion
 50     Image自动缩小#region Image自动缩小
 51     /**//// <summary>
 52     /// 缩小图片到指定的大小
 53     /// </summary>
 54     /// <param name="strOldPic">
 55     /// 原图片的位置
 56     /// </param>
 57     /// <param name="strNewPic">
 58     /// 缩小后的图片位置
 59     /// </param>
 60     /// <param name="intWidth">
 61     /// 宽度
 62     /// </param>
 63     /// <param name="intHeight">
 64     /// 高度
 65     /// </param>
 66     public void SmallPic(string strOldPic, string strNewPic, int intWidth, int intHeight)
 67     {
 68
 69       System.Drawing.Bitmap objPic, objNewPic;
 70       try
 71       {
 72         objPic = new System.Drawing.Bitmap(strOldPic);
 73         objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
 74         objNewPic.Save(strNewPic);
 75
 76       }
 77       catch (Exception exp) { throw exp; }
 78       finally
 79       {
 80         objPic = null;
 81         objNewPic = null;
 82       }
 83     }
 84
 85     public void SmallPic(string strOldPic, string strNewPic, int intWidth)
 86     {
 87
 88       System.Drawing.Bitmap objPic, objNewPic;
 89       try
 90       {
 91         objPic = new System.Drawing.Bitmap(strOldPic);
 92         int intHeight = Convert.ToInt32(((intWidth * 1.0) / (objPic.Width * 1.0)) * objPic.Height);
 93         objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
 94         objNewPic.Save(strNewPic, objPic.RawFormat);
 95
 96       }
 97       catch (Exception exp) { throw exp; }
 98       finally
 99       {
100         objPic = null;
101         objNewPic = null;
102       }
103     }
104
105     //public void SmallPic(string strOldPic, string strNewPic, int intHeight)
106     //{
107
108     //   System.Drawing.Bitmap objPic, objNewPic;
109     //   try
110     //   {
111     //     objPic = new System.Drawing.Bitmap(strOldPic);
112     //     int intWidth = Convert.ToInt32(((intHeight * 1.0) / objPic.Height) * objPic.Width);
113     //     objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
114     //     objNewPic.Save(strNewPic, objPic.RawFormat);
115
116     //   }
117     //   catch (Exception exp) { throw exp; }
118     //   finally
119     //   {
120     //     objPic = null;
121     //     objNewPic = null;
122     //   }
123     //}
124     #endregion
125
126   }
127}

http://www.cnblogs.com/chu888chu888/archive/2007/01/09/615803.html

Tags:封装 一些 实现

编辑录入:爽爽 [复制链接] [打 印]
赞助商链接