/// <summary> ///根据html路径获取图片的字节 /// </summary> /// <param name="picSize">图片尺寸,原图:1,大图:2,中图:3,小图:4</param> /// <param name="serverPath">图片服务器地址</param> /// <returns></returns> public static byte[] GetImageByteByHtmlImgUrl(string imgSize, string serverPath) { byte[] bt = new byte[4096]; try { serverPath = serverPath.Replace("_1.", string.Format("_{0}.", imgSize)); Image obj = Image.FromStream(System.Net.WebRequest.Create(serverPath).GetResponse().GetResponseStream()); bt = ImageToByteArray(obj); //使用ImageToByteArray()函数 将Image类型转成Byte[]类型 obj.Dispose(); return bt; } catch //如果获取异常 则使用资源中的图片显示 { //Image obj = Image.FromStream(""); //byte[] bt = ImageToByteArray(obj); //obj.Dispose(); //return bt; } return bt; } /// <summary> /// 根据image获取图片的字节 /// </summary> /// <param name="image"></param> /// <returns></returns> private static byte[] ImageToByteArray(Image image) { System.IO.MemoryStream mStream = new System.IO.MemoryStream(); image.Save(mStream, System.Drawing.Imaging.ImageFormat.Png); byte[] ret = mStream.ToArray(); mStream.Close(); return ret; }
CodeBy:博客园-曹永思,http://www.cnblogs.com/yonsy/p/3716483.html
根据图片二进制字节数据流获取图片Image实例
/// <summary> /// 根据图片字节流获取Image实例 /// </summary> /// <param name="imagebyte"></param> /// <returns></returns> public static Image SetByteToImage(byte[] imagebyte) { Image image; MemoryStream imagememorystream = new MemoryStream(imagebyte, 0, imagebyte.Length); image = Image.FromStream(imagememorystream); return image; }