https://www.heckjj.com/index.php zh-cn https://www.heckjj.com/csharp-asp-net-pic-upload-mark/ Heck <@hecks.tk> Fri, 10 Sep 2010 07:26:16 +0000 https://www.heckjj.com/csharp-asp-net-pic-upload-mark/ using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.IO; using System.Reflection; ///

/// FileUpload 的摘要说明 ///

public class FileUpload {   private string BasePath;   public FileUpload()   {     //     // TODO: 在此处添加构造函数逻辑     //   }   ///

  /// 给图片上水印   ///

  /// 原图片地址   /// 水印图片地址   public void MarkWater(string filePath, string waterFile)   {     //GIF不水印     int i = filePath.LastIndexOf(".");     string ex = filePath.Substring(i, filePath.Length - i);     if (string.Compare(ex, ".gif", true) == 0)     {       return;     }     string ModifyImagePath = BasePath + filePath;//修改的图像路径     int lucencyPercent = 25;     Image modifyImage = null;     Image drawedImage = null;     Graphics g = null;     try     {       //建立图形对象       modifyImage = Image.FromFile(ModifyImagePath, true);       drawedImage = Image.FromFile(BasePath + waterFile, true);       g = Graphics.FromImage(modifyImage);       //获取要绘制图形坐标       int x = modifyImage.Width - drawedImage.Width;       int y = modifyImage.Height - drawedImage.Height;       //设置颜色矩阵       float[][] matrixItems ={ new float[] {1, 0, 0, 0, 0}, new float[] {0, 1, 0, 0, 0}, new float[] {0, 0, 1, 0, 0}, new float[] {0, 0, 0, (float)lucencyPercent/100f, 0}, new float[] {0, 0, 0, 0, 1}};       ColorMatrix colorMatrix = new ColorMatrix(matrixItems);       ImageAttributes imgAttr = new ImageAttributes();       imgAttr.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);       //绘制阴影图像       g.DrawImage(drawedImage, new Rectangle(x, y, drawedImage.Width, drawedImage.Height), 10, 10, drawedImage.Width, drawedImage.Height, GraphicsUnit.Pixel, imgAttr);       //保存文件       string[] allowImageType ={ ".jpg", ".gif", ".png", ".bmp", ".tiff", ".wmf", ".ico" };       FileInfo fi = new FileInfo(ModifyImagePath);       ImageFormat imageType = ImageFormat.Gif;       switch (fi.Extension.ToLower())       {         case ".jpg":           imageType = ImageFormat.Jpeg;           break;         case ".gif":           imageType = ImageFormat.Gif;           break;         case ".png":           imageType = ImageFormat.Png;           break;         case ".bmp":           imageType = ImageFormat.Bmp;           break;         case ".tif":           imageType = ImageFormat.Tiff;           break;         case ".wmf":           imageType = ImageFormat.Wmf;           break;         case ".ico":           imageType = ImageFormat.Icon;           break;         default:           break;       }       MemoryStream ms = new MemoryStream();       modifyImage.Save(ms, imageType);       byte[] imgData = ms.ToArray();       modifyImage.Dispose();       drawedImage.Dispose();       g.Dispose();       FileStream fs = null;       File.Delete(ModifyImagePath);       fs = new FileStream(ModifyImagePath, FileMode.Create, FileAccess.Write);       if (fs != null)       {         fs.Write(imgData, 0, imgData.Length);         fs.Close();       }     }     finally     {       try       {         drawedImage.Dispose();         modifyImage.Dispose();         g.Dispose();       }       catch { ;}     }   } }
Tags - c# , asp.net , 图片 , 水印 , 上传 ]]> https://www.heckjj.com/csharp-asp-net-pic-upload-mark/#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 https://www.heckjj.com/csharp-asp-net-pic-upload-mark/#blogcomment