| 标题 | C#图片处理工具类含绘制水印阴影保存等 |
| 内容 | 一个C#写的图片处理基础类，功能包括获取或设置要修改的图像路径、获取或设置在画的图片路径(水印图片)、获取或设置水印在修改图片中的右边距、获取或设置水印在修改图片中距底部的高度、获取或设置要绘制水印的透明度,注意是原来图片透明度的百分比、获取或设置要输出图像的路径、绘制水印、绘制图形坐标、绘制阴影图像、保存文件等功能： view sourceprint?001using System; 002using System.Collections.Generic; 003using System.Linq; 004using System.Text; 005using System.IO; 006using System.Drawing; 007using System.Drawing.Drawing2D; 008using System.Drawing.Imaging; 009namespace CLB.Utility.Tools 010{ 011 public class ImageModification 012 { 013 #region "member fields" 014 private string modifyImagePath = null; 015 private string drawedImagePath = null; 016 private int rightSpace; 017 private int bottoamSpace; 018 private int lucencyPercent = 70; 019 private string outPath = null; 020 #endregion 021 public ImageModification() 022 { 023 } 024 #region "propertys" 025 /// 026 /// 获取或设置要修改的图像路径 027 /// 028 public string ModifyImagePath 029 { 030 get { return this.modifyImagePath; } 031 set { this.modifyImagePath = value; } 032 } 033 /// 034 /// 获取或设置在画的图片路径(水印图片) 035 /// 036 public string DrawedImagePath 037 { 038 get { return this.drawedImagePath; } 039 set { this.drawedImagePath = value; } 040 } 041 /// 042 /// 获取或设置水印在修改图片中的右边距 043 /// 044 public int RightSpace 045 { 046 get { return this.rightSpace; } 047 set { this.rightSpace = value; } 048 } 049 //获取或设置水印在修改图片中距底部的高度 050 public int BottoamSpace 051 { 052 get { return this.bottoamSpace; } 053 set { this.bottoamSpace = value; } 054 } 055 /// 056 /// 获取或设置要绘制水印的透明度,注意是原来图片透明度的百分比 057 /// 058 public int LucencyPercent 059 { 060 get { return this.lucencyPercent; } 061 set 062 { 063 if (value >= 0 && value <= 100) 064 this.lucencyPercent = value; 065 } 066 } 067 /// 068 /// 获取或设置要输出图像的路径 069 /// 070 public string OutPath 071 { 072 get { return this.outPath; } 073 set { this.outPath = value; } 074 } 075 #endregion 076 #region "methods" 077 /// 078 /// 开始绘制水印 079 /// 080 public void DrawImage() 081 { 082 Image modifyImage = null; 083 Image drawedImage = null; 084 Graphics g = null; 085 try 086 { 087 //建立图形对象 088 modifyImage = Image.FromFile(this.ModifyImagePath); 089 drawedImage = Image.FromFile(this.DrawedImagePath); 090 g = Graphics.FromImage(modifyImage); 091 //获取要绘制图形坐标 092 int x = modifyImage.Width - this.rightSpace; 093 int y = modifyImage.Height - this.BottoamSpace; 094 //设置颜色矩阵 095 float[][] matrixItems ={ 096 new float[] {1, 0, 0, 0, 0}, 097 new float[] {0, 1, 0, 0, 0}, 098 new float[] {0, 0, 1, 0, 0}, 099 new float[] {0, 0, 0, (float)this.LucencyPercent/100f, 0}, 100 new float[] {0, 0, 0, 0, 1}}; 101 ColorMatrix colorMatrix = new ColorMatrix(matrixItems); 102 ImageAttributes imgAttr = new ImageAttributes(); 103 imgAttr.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); 104 //绘制阴影图像 105 g.DrawImage( 106 drawedImage, 107 new Rectangle(x, y, drawedImage.Width, drawedImage.Height), 108 0, 0, drawedImage.Width, drawedImage.Height, 109 GraphicsUnit.Pixel, imgAttr); 110 //保存文件 111 string[] allowImageType = { ".jpg", ".gif", ".png", ".bmp", ".tiff", ".wmf", ".ico" }; 112 FileInfo file = new FileInfo(this.ModifyImagePath); 113 ImageFormat imageType = ImageFormat.Gif; 114 switch (file.Extension.ToLower()) 115 { 116 case ".jpg": 117 imageType = ImageFormat.Jpeg; 118 break; 119 case ".gif": 120 imageType = ImageFormat.Gif; 121 break; 122 case ".png": 123 imageType = ImageFormat.Png; 124 break; 125 case ".bmp": 126 imageType = ImageFormat.Bmp; 127 break; 128 case ".tif": 129 imageType = ImageFormat.Tiff; 130 break; 131 case ".wmf": 132 imageType = ImageFormat.Wmf; 133 break; 134 case ".ico": 135 imageType = ImageFormat.Icon; 136 break; 137 default: 138 break; 139 } 140 MemoryStream ms = new MemoryStream(); 141 modifyImage.Save(ms, imageType); 142 byte[] imgData = ms.ToArray(); 143 modifyImage.Dispose(); 144 drawedImage.Dispose(); 145 g.Dispose(); 146 FileStream fs = null; 147 if (this.OutPath == null || this.OutPath == "") 148 { 149 File.Delete(this.ModifyImagePath); 150 fs = new FileStream(this.ModifyImagePath, FileMode.Create, FileAccess.Write); 151 } 152 else 153 { 154 fs = new FileStream(this.OutPath, FileMode.Create, FileAccess.Write); 155 } 156 if (fs != null) 157 { 158 fs.Write(imgData, 0, imgData.Length); 159 fs.Close(); 160 } 161 } 162 finally 163 { 164 try 165 { 166 drawedImage.Dispose(); 167 modifyImage.Dispose(); 168 g.Dispose(); 169 } 170 catch { ;} 171 } 172 } 173 #endregion 174 } 175} |
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