C#中操作Stream與Byte Array

C#中操作Stream與Byte Array2008-08-01 20:41

本文為frank的學習筆記，轉載請註明原文連結 C#中結合Post發送的Stream與Byte Array的操作似乎資料很少.下面是我這幾天的研究成果.功能是將同檔案夾下的a.jpg複製產生b.jpg.代碼如下: byteArray.aspx.cs using 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#複製圖片,流與byteArray的應用,產生圖片部分 */ 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("失敗");             }         }     } } 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#複製圖片,流與byteArray的應用,提交圖片部分 */ 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("複製圖片成功");             }             catch             {                 Response.Write("複製圖片失敗");             }         }         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;         }     } } 相對來說，byte Array在Html表單中的應用可能一直被忽視,但是正確的應用byte Array可以大大的最佳化程式,並做出一些意想不到的效果來。當然，我研究byte Array主要還是為了最近的Flash研究. 附上範例檔案:http://www.2solo.cn/upload/cbyteArray_2soloDOTcn.zip