.net上传，一个选择直接上传(ashx)和byteArray上传 

<%@ WebHandler Language="C#" Class="UploadImage" %>
using System;
using System.Web;
public class UploadImage : IHttpHandler
{
    //文件上传目录
    private string uploadFolder = "UploadImage";
    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/plain";
        HttpFileCollection files = context.Request.Files;
        if (files.Count > 0)
        {
            string path = context.Server.MapPath(uploadFolder);
            HttpPostedFile file = files[0];
            if (file != null && file.ContentLength > 0)
            {
                string fileName = DateTime.Now.ToString("yyyyMMddhhmmss") + context.Request.Form["fileName"];
                string savePath = path + "/" + fileName;
                file.SaveAs(savePath);
                System.Web.HttpResponse obj = context.Response;
                obj.Write(fileName);
            }
        }
        else
        {
            context.Response.Write("参数错误");
            context.Response.End();
        }
    }
    
    public bool IsReusable {
        get {
            return false;
        }
    }
}

 

<%@ Page Language="C#" ContentType="text/html" ResponseEncoding="gb2312" Debug="true"%>
<%@ Import Namespace="System.IO" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>上传</title>
</head>
<body>

<script language="c#" runat="server">
public void Page_Load(Object sender,EventArgs e)
{
  if (true)
        {
            string saveToFolder = "file";
            string Path = Server.MapPath(saveToFolder);
 
            //通过Resquest.InputStream解收的是Stream形式，转换成byte[]形式
            Stream s = Request.InputStream;
            byte[] bt = StreamToBytes(s);
 
            //将byte[]形式转换成MemoryStream形式，再保存为图片
            System.IO.MemoryStream ms = new System.IO.MemoryStream(bt);
            System.Drawing.Bitmap b = new System.Drawing.Bitmap(ms);
            b.Save(Path + "/proj.jpg");
            Response.Write(true);
            Response.End();
 
        }
        
}
    //此函数将Stream转换成byte[]
    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;
    }
</script>
</body>
</html>

 

posted @ 2009-10-31 11:48  CoderWayne  阅读(454)  评论(0)    收藏  举报