封裝的一些實現圖片水印與圖片自動結合縮放的類

2019-11-18 16:44:51

字體：大中小

來源：轉載

供稿：網友

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 的摘要說明
16    /// </summary>
17    public class ImageHelper
18    {
19        public ImageHelper()
20        {
21            //
22            // TODO: 在此處添加構造函數邏輯
23            //
24        }
25        Image水印#region Image水印
26        /**//// <summary>
27        /// 寫入圖像水印
28        /// </summary>
29        /// <param name="str">水印字符串</param>
30        /// <param name="filePath">原圖片位置</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            //創建圖片
37            Graphics graphics = Graphics.FromImage(img);
38            //指定要繪制的面積
39            graphics.DrawImage(img, 0, 0, img.Width, img.Height);
40            //定義字段和畫筆
41            Font font = new Font("黑體", 16);
42            Brush brush = new SolidBrush(Color.Yellow);
43            graphics.DrawString(str, font, brush, x, y);
44            //保存并輸出圖片
45            img.Save(pageCurrent.MapPath(savePath), System.Drawing.Imaging.ImageFormat.Jpeg);
46            return savePath;
47
48        }
49        #endregion
50        Image自動縮小#region Image自動縮小
51        /**//// <summary>
52        /// 縮小圖片到指定的大小
53        /// </summary>
54        /// <param name="strOldPic">
55        /// 原圖片的位置
56        /// </param>
57        /// <param name="strNewPic">
58        /// 縮小后的圖片位置
59        /// </param>
60        /// <param name="intWidth">
61        /// 寬度
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}