cyf
102 lines
3.3 KiB
C#
102 lines
3.3 KiB
C#
/******************************
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* 说明：图片处理相关类
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* 创建人：龚宇超
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* 创建日期：2017-07-24
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* 修改人：
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* 修改日期：
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* 修改备注：
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* 版本：1.0.0.0
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******************************/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.IO;
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using System.Runtime.Serialization.Formatters.Binary;
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using System.Drawing;
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namespace Lskj.Util
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{
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public static class ImageHelper
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{
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/// <summary>
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/// <para>说明：将byte[]转换为Image</para>
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/// <para>创建人：龚宇超</para>
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/// <para>创建日期：2017-07-24 </para>
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/// <para>修改人：</para>
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/// <para>修改日期：</para>
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/// <para>修改备注：</para>
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/// <para>版本：1.0</para>
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/// </summary>
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/// <param name="bytes">byte数组</param>
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/// <returns>转换后图片</returns>
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public static Image ReadImage(byte[] bytes)
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{
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try
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{
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if (bytes == null) return null;
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using (System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes))
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using (System.Drawing.Image sourceImage = System.Drawing.Image.FromStream(ms))
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{
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return new Bitmap(sourceImage);
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}
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}
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catch (Exception)
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{
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}
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return null;
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}
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/// <summary>
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/// 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
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/// </summary>
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/// <param name="path"></param>
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/// <returns></returns>
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public static Image ReadImage(string path)
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{
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try
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{
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if (string.IsNullOrWhiteSpace(path) || !File.Exists(path)) return null;
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byte[] image = File.ReadAllBytes(path);
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return ReadImage(image);
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}
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catch (Exception)
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{
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}
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return null;
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}
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/// <summary>
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/// <para>说明：将图片转换为byte数组</para>
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/// <para>创建人：龚宇超</para>
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/// <para>创建日期：2017-07-24 </para>
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/// <para>修改人：</para>
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/// <para>修改日期：</para>
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/// <para>修改备注：</para>
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/// <para>版本：1.0</para>
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/// </summary>
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/// <param name="image">图片</param>
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/// <returns>转换后的byte数组</returns>
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public static byte[] ConvertImage(Image image)
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{
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try
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{
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//实例化流
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System.IO.MemoryStream imageStream = new System.IO.MemoryStream();
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//将图片的实例保存到流中
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image.Save(imageStream, System.Drawing.Imaging.ImageFormat.Bmp);
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//image.Save(imageStream, image.RawFormat);
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//保存流的二进制数组
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byte[] imageContent = new Byte[imageStream.Length];
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imageStream.Position = 0;
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//将流泻如数组中
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imageStream.Read(imageContent, 0, (int)imageStream.Length);
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return imageStream.ToArray();
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}
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catch (Exception)
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{
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}
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return null;
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}
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}
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}
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