C#實現圖片縮放,並給圖片加上帶著作權的浮水印

1. using System;
2. using System.Data;
3. using System.Configuration;
4. using System.Collections;
5. using System.Web;
6. using System.Web.Security;
7. using System.Web.UI;
8. using System.Web.UI.WebControls;
9. using System.Web.UI.WebControls.WebParts;
10. using System.Web.UI.HtmlControls;
11. using System.Drawing;
12. using System.Drawing.Drawing2D;
13. using System.Drawing.Imaging;
16. public partial class Web_MakeWaterMark : System.Web.UI.Page
17. {
18.     /// <param name="newFaxWidtht">縮放至寬度</param>
19.     /// <param name="newFaxHeight">縮放至高度</param>
20.     int newFaxWidtht = 100;
21.     int newFaxHeight = 120;
23.     protected void Page_Load(object sender, EventArgs e)
24.     {
25.         string strOldPic = "images/welcome.jpg";
26.         string strNewPic = "images/welcome-1.jpg";
27.         this.SmallPic(strOldPic, strNewPic, newFaxWidtht, newFaxHeight);
28.         this.MakeWaterMark(strNewPic);
29.     }
31.     /**//**//**//// <summary>
32.     /// 產生帶著作權浮水印的圖片
33.     /// </summary>
34.     /// <param name="IconImg">要產生浮水印圖片的檔案地址</param>
35.     private void MakeWaterMark(string IconImg)
36.     {
37.         //定義輸出位元影像
38.         Bitmap bmp = new Bitmap(newFaxWidtht, newFaxHeight);
39.         //定義繪圖對象
40.         Graphics g = Graphics.FromImage(bmp);
41.         //描述繪圖矩形地區 
42.         Rectangle newRect = new Rectangle(0, 0, newFaxWidtht, newFaxHeight);
43.         //設定背景色
44.         g.FillRectangle(new SolidBrush(Color.White), newRect);
45.         //擷取要產生浮水印的圖片
46.         Bitmap newBitmap = new Bitmap(IconImg);
47.         g.DrawImage(newBitmap, 0, 0);
48.         //定義浮水印字的字型
49.         Font font = new Font( "Arial", 10, FontStyle.Bold);
50.         //定義浮水印字的格式刷
51.         LinearGradientBrush brush = new LinearGradientBrush(
52.                                                               new Rectangle(0, 0, 10, 20), 
53.                                                               Color.Red,
54.                                                               Color.Blue, 
55.                                                               10f, 
56.                                                               true
57.                                                            );
58.         //給照片打上浮水印
59.         g.DrawString("szrjjz.com", font, brush, 0, newFaxHeight-20);
60.         //儲存為新的輸出圖片
61.         System.IO.MemoryStream ms = new System.IO.MemoryStream();
62.         bmp.Save(ms, ImageFormat.Jpeg);
64.         //輸出圖片
65.         Response.ClearContent();
66.         Response.ContentType = "image/jpeg";
67.         Response.BinaryWrite(ms.ToArray());
68.     }
70.     /// <summary>
71.     /// 縮放圖片
72.     /// </summary>
73.     /// <param name="strOldPic">源圖檔案名稱(包括路徑)</param>
74.     /// <param name="strNewPic">縮放後儲存為檔案名稱(包括路徑)</param>
75.     /// <param name="intWidth">縮放至寬度</param>
76.     /// <param name="intHeight">縮放至高度</param>
77.     public void SmallPic(string strOldPic, string strNewPic, int intWidth, int intHeight)
78.     {
80.         System.Drawing.Bitmap objPic, objNewPic;
81.         try
82.         {
83.             objPic = new System.Drawing.Bitmap(strOldPic);
84.             objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
85.             objNewPic.Save(strNewPic);
87.         }
88.         catch (Exception exp) { throw exp; }
89.         finally
90.         {
91.             objPic = null;
92.             objNewPic = null;
93.         }
94.     }
96. }