基线 SVN r240

SVN-Revision: r240

插件库/Lskj.Util/ImageHelper.cs

@@ -0,0 +1,107 @@
+/******************************
+* 说明：图片处理相关类
+* 创建人：龚宇超
+* 创建日期：2017-07-24
+* 修改人：
+* 修改日期：
+* 修改备注：
+* 版本：1.0.0.0
+******************************/
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.IO;
+using System.Runtime.Serialization.Formatters.Binary;
+using System.Drawing;
+
+namespace Lskj.Util
+{
+    public static class ImageHelper
+    {
+        /// <summary>
+        /// <para>说明：将byte[]转换为Image</para>
+        /// <para>创建人：龚宇超</para>
+        /// <para>创建日期：2017-07-24 </para>
+        /// <para>修改人：</para>
+        /// <para>修改日期：</para>
+        /// <para>修改备注：</para>
+        /// <para>版本：1.0</para>
+        /// </summary>
+        /// <param name="bytes">byte数组</param>
+        /// <returns>转换后图片</returns>
+        public static Image ReadImage(byte[] bytes)
+        {
+            try
+            {
+                if (bytes == null) return null;
+                using (System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes))
+                {
+                    System.Drawing.Image returnImage = System.Drawing.Image.FromStream(ms);
+                    ms.Flush();
+                    return returnImage;
+                }
+            }
+            catch (Exception)
+            {
+            }
+            return null;
+        }
+        /// <summary>
+        /// 通过FileStream 来打开文件，这样就可以实现不锁定Image文件，到时可以让多用户同时访问Image文件
+        /// </summary>
+        /// <param name="path"></param>
+        /// <returns></returns>
+        public static Image ReadImage(string path)
+        {
+            try
+            {
+                FileStream fs = File.OpenRead(path); //OpenRead
+                int filelength = 0;
+                filelength = (int)fs.Length; //获得文件长度 
+                Byte[] image = new Byte[filelength]; //建立一个字节数组 
+                fs.Read(image, 0, filelength); //按字节流读取 
+                System.Drawing.Image result = System.Drawing.Image.FromStream(fs);
+                fs.Close();
+                return result;
+            }
+            catch (Exception)
+            {
+            }
+            return null;
+        }
+        /// <summary>
+        /// <para>说明：将图片转换为byte数组</para>
+        /// <para>创建人：龚宇超</para>
+        /// <para>创建日期：2017-07-24 </para>
+        /// <para>修改人：</para>
+        /// <para>修改日期：</para>
+        /// <para>修改备注：</para>
+        /// <para>版本：1.0</para>
+        /// </summary>
+        /// <param name="image">图片</param>
+        /// <returns>转换后的byte数组</returns>
+        public static byte[] ConvertImage(Image image)
+        {
+            try
+            {
+                //实例化流
+                System.IO.MemoryStream imageStream = new System.IO.MemoryStream();
+                //将图片的实例保存到流中
+                image.Save(imageStream, System.Drawing.Imaging.ImageFormat.Bmp);
+                //image.Save(imageStream, image.RawFormat);
+                //保存流的二进制数组
+                byte[] imageContent = new Byte[imageStream.Length];
+                imageStream.Position = 0;
+                //将流泻如数组中
+                imageStream.Read(imageContent, 0, (int)imageStream.Length);
+                return imageStream.ToArray();
+            }
+            catch (Exception)
+            {
+                
+            }
+            return null;
+        }
+    }
+}