1 1using System;
2 2using System.Data;
3 3using System.Configuration;
4 4using System.Web;
5 5using System.Web.Security;
6 6using System.Web.UI;
7 7using System.Web.UI.WebControls;
8 8using System.Web.UI.WebControls.WebParts;
9 9using System.Web.UI.HtmlControls;
10 10using System.Drawing;
11 11namespace WebHelper
12 12{
13 13
14 14 /**//**//**//// <summary>
15 15 /**//// ImageHelper 的摘要说明
16 16 /**//// </summary>
17 17 public class ImageHelper
18 18 {
19 19 public ImageHelper()
20 20 {
21 21 //
22 22 // TODO: 在此处添加构造函数逻辑
23 23 //
24 24 }
25 25 Image水印Image水印#region Image水印
26 26 /**//**//**//// <summary>
27 27 /**//// 写入图像水印
28 28 /**//// </summary>
29 29 /**//// <param name="str">水印字符串</param>
30 30 /**//// <param name="filePath">原图片位置</param>
31 31 /**//// <param name="savePath">水印加入后的位置</param>
32 32 /**//// <returns></returns>
33 33 public string CreateBackImage(System.Web.UI.Page pageCurrent, string str, string filePath, string savePath, int x, int y)
34 34 {
35 35 System.Drawing.Image img = System.Drawing.Image.FromFile(pageCurrent.MapPath(filePath));
36 36 //创建图片
37 37 Graphics graphics = Graphics.FromImage(img);
38 38 //指定要绘制的面积
39 39 graphics.DrawImage(img, 0, 0, img.Width, img.Height);
40 40 //定义字段和画笔
41 41 Font font = new Font("黑体", 16);
42 42 Brush brush = new SolidBrush(Color.Yellow);
43 43 graphics.DrawString(str, font, brush, x, y);
44 44 //保存并输出图片
45 45 img.Save(pageCurrent.MapPath(savePath), System.Drawing.Imaging.ImageFormat.Jpeg);
46 46 return savePath;
47 47
48 48 }
49 49 #endregion
50 50 Image自动缩小Image自动缩小#region Image自动缩小
51 51 /**//**//**//// <summary>
52 52 /**//// 缩小图片到指定的大小
53 53 /**//// </summary>
54 54 /**//// <param name="strOldPic">
55 55 /**//// 原图片的位置
56 56 /**//// </param>
57 57 /**//// <param name="strNewPic">
58 58 /**//// 缩小后的图片位置
59 59 /**//// </param>
60 60 /**//// <param name="intWidth">
61 61 /**//// 宽度
62 62 /**//// </param>
63 63 /**//// <param name="intHeight">
64 64 /**//// 高度
65 65 /**//// </param>
66 66 public void SmallPic(string strOldPic, string strNewPic, int intWidth, int intHeight)
67 67 {
68 68
69 69 System.Drawing.Bitmap objPic, objNewPic;
70 70 try
71 71 {
72 72 objPic = new System.Drawing.Bitmap(strOldPic);
73 73 objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
74 74 objNewPic.Save(strNewPic);
75 75
76 76 }
77 77 catch (Exception exp) { throw exp; }
78 78 finally
79 79 {
80 80 objPic = null;
81 81 objNewPic = null;
82 82 }
83 83 }
84 84
85 85 public void SmallPic(string strOldPic, string strNewPic, int intWidth)
86 86 {
87 87
88 88 System.Drawing.Bitmap objPic, objNewPic;
89 89 try
90 90 {
91 91 objPic = new System.Drawing.Bitmap(strOldPic);
92 92 int intHeight = Convert.ToInt32(((intWidth * 1.0) / (objPic.Width * 1.0)) * objPic.Height);
93 93 objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
94 94 objNewPic.Save(strNewPic, objPic.RawFormat);
95 95
96 96 }
97 97 catch (Exception exp) { throw exp; }
98 98 finally
99 99 {
100100 objPic = null;
101101 objNewPic = null;
102102 }
103103 }
104104
105105 //public void SmallPic(string strOldPic, string strNewPic, int intHeight)
106106 //{
107107
108108 // System.Drawing.Bitmap objPic, objNewPic;
109109 // try
110110 // {
111111 // objPic = new System.Drawing.Bitmap(strOldPic);
112112 // int intWidth = Convert.ToInt32(((intHeight * 1.0) / objPic.Height) * objPic.Width);
113113 // objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
114114 // objNewPic.Save(strNewPic, objPic.RawFormat);
115115
116116 // }
117117 // catch (Exception exp) { throw exp; }
118118 // finally
119119 // {
120120 // objPic = null;
121121 // objNewPic = null;
122122 // }
123123 //}
124124 #endregion
125125
126126 }
127127}
posted @
2008-10-07 12:26
Elliott.Dong
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