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C#中操作Stream与Byte Array

2008-10-09 20:54 295 查看

C#中操作Stream与Byte Array
2008-08-01 20:41

本文为frank的学习笔记，转载请注明原文链接

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

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#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;

}

}

}

相对来说，byte Array在Html表单中的应用可能一直被忽视,但是正确的应用byte Array可以大大的优化程序,并做出一些意想不到的效果来。当然，我研究byte Array主要还是为了最近的Flash研究.

附上范例文件:http://www.2solo.cn/upload/cbyteArray_2soloDOTcn.zip

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