图片转换成字节流先要转换的IMage对象，转换之后返回字节流。字节流转换成图片，要转换的字节流，转换得到的Image对象，根据图片路径返回图片的字节流，感兴趣的朋友看下下面的代码。

C#将图片和字节流相互转换代码：

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Drawing;usingSystem.IO;namespaceMicrosoft.Form.Base{classImageToByte{/// <summary>/// 图片转换成字节流/// </summary>/// <param name="img">要转换的Image对象</param>/// <returns>转换后返回的字节流</returns>publicstaticbyte[] ImgToByt(Image img){MemoryStream ms = newMemoryStream();byte[] imagedata = null;img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);imagedata = ms.GetBuffer();returnimagedata;}/// <summary>/// 字节流转换成图片/// </summary>/// <param name="byt">要转换的字节流</param>/// <returns>转换得到的Image对象</returns>publicstaticImage BytToImg(byte[] byt){MemoryStream ms = newMemoryStream(byt);Image img = Image.FromStream(ms);returnimg;}///// <summary>/// 根据图片路径返回图片的字节流byte[]/// </summary>/// <param name="imagePath">图片路径</param>/// <returns>返回的字节流</returns>privatestaticbyte[] getImageByte(stringimagePath){FileStream files = newFileStream(imagePath, FileMode.Open);byte[] imgByte = newbyte[files.Length];files.Read(imgByte, 0, imgByte.Length);files.Close();returnimgByte;}}}

将字节流转换为图片文件显示到页面上

//Byte[] result;System.IO.MemoryStream ms =new MemoryStream(result, 0, result.Length) Response.ClearContent(); Response.ContentType = "image/Gif"; Response.BinaryWrite(ms.ToArray());或者添加一个处理图片的Handler，内容如下：<%@ WebHandler Language="C#" Class="Handler" %>using System.Web;using System.IO;public class Handler : IHttpHandler { public void ProcessRequest (HttpContext context) { int CategoryID = int.Parse(context.Request.QueryString["CategoryID"]); //调用Categories.GetPicture取得图片stream Stream stream = CategoriesPicture.GetPicture(CategoryID); if (stream !=null) { //取得图片stream大小 int buffersize = (int)stream.Length; //建立buffer System.Byte[] buffer = new System.Byte[buffersize ] ; //调用stream.Read，从stream读取到buffer，并返回count int count = stream.Read(buffer, 0, buffersize); //返回图片字段buffer if (count!=0) context.Response.OutputStream.Write(buffer, 0, count); } } public bool IsReusable { get { return false; } }}

以上就是本文的全部内容，希望对大家学习C#将图片和字节流互相转换并显示到页面上有所帮助。