* Stream 和 byte[] 之间的转换

* Stream 和 byte[] 之间的转换
* - - - - - - - - - - - - - - - - - - - - - - - */
/// <summary>
/// 将 Stream 转成 byte[]
/// </summary>
public byte[] StreamToBytes(Stream stream)
{
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
// 设置当前流的位置为流的开始
stream.Seek(0, SeekOrigin.Begin);
return bytes;
}
/// <summary>
/// 将 byte[] 转成 Stream
/// </summary>
public Stream BytesToStream(byte[] bytes)
{
Stream stream = new MemoryStream(bytes);
return stream;
}

/* - - - - - - - - - - - - - - - - - - - - - - - -
* Stream 和 文件之间的转换
* - - - - - - - - - - - - - - - - - - - - - - - */
/// <summary>
/// 将 Stream 写入文件
/// </summary>
public void StreamToFile(Stream stream,string fileName)
{
// 把 Stream 转换成 byte[]
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
// 设置当前流的位置为流的开始
stream.Seek(0, SeekOrigin.Begin);
// 把 byte[] 写入文件
FileStream fs = new FileStream(fileName, FileMode.Create);
BinaryWriter bw = new BinaryWriter(fs);
bw.Write(bytes);
bw.Close();
fs.Close();
}
/// <summary>
/// 从文件读取 Stream
/// </summary>
public Stream FileToStream(string fileName)
{
// 打开文件
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
// 读取文件的 byte[]
byte[] bytes = new byte[fileStream.Length];
fileStream.Read(bytes, 0, bytes.Length);
fileStream.Close();
// 把 byte[] 转换成 Stream
Stream stream = new MemoryStream(bytes);
return stream;
}  

 

 

 

C#中结合Post发送的Stream与Byte Array的操作似乎资料很少.下面是我这几天的研究成果.功能是将同文件夹下的a.jpg复制生成b.jpg.代码如下:

byteArray.aspx.cs

 

sing System;
using System.IO;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Net;
/*@
Author:frank
Site:www.2solo.cn
Date:2008.02.20
Info:C#复制图片,流与byteArray的应用,生成图片部分
*/
namespace bArray {
   public partial class imgHandler : System.Web.UI.Page
     {
        protected void Page_Load(object sender, EventArgs e)
         {
            try
            {
                Stream sin = Page.Request.InputStream;
                System.Drawing.Image img = System.Drawing.Bitmap.FromStream(sin);
                Bitmap bmp = new Bitmap(img);
                MemoryStream bmpStream = new MemoryStream();
                bmp.Save(bmpStream, System.Drawing.Imaging.ImageFormat.Jpeg);
                FileStream fs = new FileStream(System.Web.HttpContext.Current.Server.MapPath("b.jpg"), FileMode.Create);
                bmpStream.WriteTo(fs);
                bmpStream.Close();
                fs.Close();
                bmpStream.Dispose();
                fs.Dispose();
                Response.Write("成功");
            }
            catch
            {
                Response.Write("失败");
            }
        }
    }
}

sing System; using System.IO; using System.Data; using System.Drawing; using System.Drawing.Imaging; using System.Net; /*@ Author:frank Site:www.2solo.cn Date:2008.02.20 Info:C#复制图片,流与byteArray的应用,生成图片部分 */ namespace bArray { public partial class imgHandler : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { try { Stream sin = Page.Request.InputStream; System.Drawing.Image img = System.Drawing.Bitmap.FromStream(sin); Bitmap bmp = new Bitmap(img); MemoryStream bmpStream = new MemoryStream(); bmp.Save(bmpStream, System.Drawing.Imaging.ImageFormat.Jpeg); FileStream fs = new FileStream(System.Web.HttpContext.Current.Server.MapPath("b.jpg"), FileMode.Create); bmpStream.WriteTo(fs); bmpStream.Close(); fs.Close(); bmpStream.Dispose(); fs.Dispose(); Response.Write("成功"); } catch { Response.Write("失败"); } } } }  

 

gopost.aspx.cs

using System;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using System.Net;
using System.Text;
/*@
Author:frank
Site:www.2solo.cn
Date:2008.02.20
info:C#复制图片,流与byteArray的应用,提交图片部分
*/
namespace gopost
{
    public partial class postHandler : System.Web.UI.Page
    {
       protected void Page_Load(object sender, EventArgs e)
        {
           postImage();
        }
       private void postImage()
        {
            try
            {
                HttpWebRequest request;
                string imgUrl = System.Web.HttpContext.Current.Server.MapPath("a.jpg");
                request = (HttpWebRequest)HttpWebRequest.Create(http://localhost/byteArray/byteArray.aspx);
                request.KeepAlive = true;
                request.Method = "POST";
                byte[] byteArray = CvtImgBArr((System.Drawing.Image)new Bitmap(@imgUrl), ImageFormat.Jpeg);
                request.ContentType = "image/JPEG";
                request.ContentLength = byteArray.Length;
                Stream newStream = request.GetRequestStream();
                newStream.Write(byteArray, 0, byteArray.Length);
                newStream.Close();
                Response.Write("复制图片成功");
            }
            catch
            {
                Response.Write("复制图片失败");
            }
        }
        private static byte[] CvtImgBArr(System.Drawing.Image imageToConvert, ImageFormat formatOfImage)
        {
            byte[] imArr;
            try
            {
                using (MemoryStream myms = new MemoryStream())
                {
                    imageToConvert.Save(myms, formatOfImage);
                    imArr = myms.ToArray();
                }
            }
            catch (Exception) { throw; }
            return imArr;
        }
    }
}