1using System;
  2using System.Data;
  3using System.Configuration;
  4using System.Collections;
  5using System.Web;
  6using System.Web.Security;
  7using System.Web.UI;
  8using System.Web.UI.WebControls;
  9using System.Web.UI.WebControls.WebParts;
 10using System.Web.UI.HtmlControls;
 11using System.IO;
 12using System.Net;
 13using System.Text.RegularExpressions;
 14
 15namespace _51aspxImgUpload
 16...{
 17    /**//// <summary>
 18    /// 上传图片生成缩略图及水印 (来自：http://www.51aspx.com/CV/ImageUpload)
 19    /// </summary>
 20    public partial class _Default : System.Web.UI.Page
 21    ...{
 22        protected void Page_Load(object sender, EventArgs e)
 23        ...{
 24
 25        }
 26
 27        protected void Button1_Click(object sender, EventArgs e)
 28        ...{
 29            if (FileUpload1.HasFile)
 30            ...{
 31                string fileContentType = FileUpload1.PostedFile.ContentType;
 32                if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
 33                ...{
 34                    string name = FileUpload1.PostedFile.FileName;                  // 客户端文件路径
 35
 36                    FileInfo file = new FileInfo(name);
 37                    string fileName = file.Name;                                    // 文件名称
 38                    string fileName_s = "x_" + file.Name;                           // 缩略图文件名称
 39                    string fileName_sy = "text_" + file.Name;                         // 水印图文件名称（文字）
 40                    string fileName_syp = "water_" + file.Name;                       // 水印图文件名称（图片）
 41                    string webFilePath = Server.MapPath("ImgUpload/" + fileName);        // 服务器端文件路径
 42                    string webFilePath_s = Server.MapPath("ImgUpload/" + fileName_s);　　// 服务器端缩略图路径
 43                    string webFilePath_sy = Server.MapPath("ImgUpload/" + fileName_sy);　// 服务器端带水印图路径(文字)
 44                    string webFilePath_syp = Server.MapPath("ImgUpload/" + fileName_syp);　// 服务器端带水印图路径(图片)
 45                    string webFilePath_sypf = Server.MapPath("51aspx.png");　// 服务器端水印图路径(图片)
 46
 47                    if (!File.Exists(webFilePath))
 48                    ...{
 49                        try
 50                        ...{
 51                            FileUpload1.SaveAs(webFilePath);                                // 使用 SaveAs 方法保存文件
 52                            AddWater(webFilePath, webFilePath_sy);
 53                            AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf);
 54                            MakeThumbnail(webFilePath, webFilePath_s, 130, 130, "Cut");     // 生成缩略图方法
 55                            Label1.Text = "提示：文件“" + fileName + "”成功上传，并生成“" + fileName_s + "”缩略图，文件类型为：" + FileUpload1.PostedFile.ContentType + "，文件大小为：" + FileUpload1.PostedFile.ContentLength + "B";
 56                        }
 57                        catch (Exception ex)
 58                        ...{
 59                            Label1.Text = "提示：文件上传失败，失败原因：" + ex.Message;
 60                        }
 61                    }
 62                    else
 63                    ...{
 64                        Label1.Text = "提示：文件已经存在，请重命名后上传";
 65                    }
 66                }
 67                else
 68                ...{
 69                    Label1.Text = "提示：文件类型不符";
 70                }
 71            }
 72        }
 73        /**//**/
 74        /**//// <summary>
 75        /// 生成缩略图
 76        /// </summary>
 77        /// <param name="originalImagePath">源图路径（物理路径）</param>
 78        /// <param name="thumbnailPath">缩略图路径（物理路径）</param>
 79        /// <param name="width">缩略图宽度</param>
 80        /// <param name="height">缩略图高度</param>
 81        /// <param name="mode">生成缩略图的方式</param>    
 82        public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
 83        ...{
 84            System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
 85
 86            int towidth = width;
 87            int toheight = height;
 88
 89            int x = 0;
 90            int y = 0;
 91            int ow = originalImage.Width;
 92            int oh = originalImage.Height;
 93
 94            switch (mode)
 95            ...{
 96                case "HW"://指定高宽缩放（可能变形）                
 97                    break;
 98                case "W"://指定宽，高按比例                    
 99                    toheight = originalImage.Height * width / originalImage.Width;
100                    break;
101                case "H"://指定高，宽按比例
102                    towidth = originalImage.Width * height / originalImage.Height;
103                    break;
104                case "Cut"://指定高宽裁减（不变形）                
105                    if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
106                    ...{
107                        oh = originalImage.Height;
108                        ow = originalImage.Height * towidth / toheight;
109                        y = 0;
110                        x = (originalImage.Width - ow) / 2;
111                    }
112                    else
113                    ...{
114                        ow = originalImage.Width;
115                        oh = originalImage.Width * height / towidth;
116                        x = 0;
117                        y = (originalImage.Height - oh) / 2;
118                    }
119                    break;
120                default:
121                    break;
122            }
123
124            //新建一个bmp图片
125            System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
126
127            //新建一个画板
128            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
129
130            //设置高质量插值法
131            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
132
133            //设置高质量,低速度呈现平滑程度
134            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
135
136            //清空画布并以透明背景色填充
137            g.Clear(System.Drawing.Color.Transparent);
138
139            //在指定位置并且按指定大小绘制原图片的指定部分
140            g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
141                new System.Drawing.Rectangle(x, y, ow, oh),
142                System.Drawing.GraphicsUnit.Pixel);
143
144            try
145            ...{
146                //以jpg格式保存缩略图
147                bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
148            }
149            catch (System.Exception e)
150            ...{
151                throw e;
152            }
153            finally
154            ...{
155                originalImage.Dispose();
156                bitmap.Dispose();
157                g.Dispose();
158            }
159        }
160
161        /**//**/
162        /**//// <summary>
163        /// 在图片上增加文字水印
164        /// </summary>
165        /// <param name="Path">原服务器图片路径</param>
166        /// <param name="Path_sy">生成的带文字水印的图片路径</param>
167        protected void AddWater(string Path, string Path_sy)
168        ...{
169            string addText = "51aspx.com";
170            System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
171            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
172            g.DrawImage(image, 0, 0, image.Width, image.Height);
173            System.Drawing.Font f = new System.Drawing.Font("Verdana", 60);
174            System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);
175
176            g.DrawString(addText, f, b, 35, 35);
177            g.Dispose();
178
179            image.Save(Path_sy);
180            image.Dispose();
181        }
182
183        /**//**/
184        /**//// <summary>
185        /// 在图片上生成图片水印
186        /// </summary>
187        /// <param name="Path">原服务器图片路径</param>
188        /// <param name="Path_syp">生成的带图片水印的图片路径</param>
189        /// <param name="Path_sypf">水印图片路径</param>
190        protected void AddWaterPic(string Path, string Path_syp, string Path_sypf)
191        ...{
192            System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
193            System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Path_sypf);
194            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
195            g.DrawImage(copyImage, new System.Drawing.Rectangle(image.Width - copyImage.Width, image.Height - copyImage.Height, copyImage.Width, copyImage.Height), 0, 0, copyImage.Width, copyImage.Height, System.Drawing.GraphicsUnit.Pixel);
196            g.Dispose();
197
198            image.Save(Path_syp);
199            image.Dispose();
200        }
201
202        protected void Button2_Click(object sender, EventArgs e)
203        ...{
204            //自动保存远程图片
205                WebClient client = new WebClient();
206                //备用Reg:<img.*?src=([\"\'])(http:\/\/.+\.(jpg|gif|bmp|bnp))\1.*?>
207                Regex reg = new Regex("IMG[^>]*?src\\s*=\\s*(?:\"(?<1>[^\"]*)\"|'(?<1>[^\']*)')", RegexOptions.IgnoreCase);
208                MatchCollection m = reg.Matches(TextBox1.Text);
209
210                foreach (Match math in m)
211                ...{
212                    string imgUrl = math.Groups[1].Value;
213
214                    //在原图片名称前加YYMMDD重名名并上传
215
216                    Regex regName = new Regex(@"\w+.(?:jpg|gif|bmp|png)", RegexOptions.IgnoreCase);
217
218                    string strNewImgName = DateTime.Now.ToShortDateString().Replace("-", "") + regName.Match(imgUrl).ToString();
219
220                    try
221                    ...{
222                        //保存图片
223                        client.DownloadFile(imgUrl, Server.MapPath("ImgUpload/Auto/" + strNewImgName));
224
225                    }
226                    catch
227                    ...{
228                    }
229                    finally
230                    ...{
231
232                    }
233
234                client.Dispose();
235            }
236
237            Response.Write("<script>alert('远程图片保存成功，保存路径为ImgUpload/auto')</script>");
238
239        }
240    }
241}
242