asp.net图片上传或文件上传简单实例-罗分明网络博客

简单介绍

这个由Htmlpage1.html嵌套htmlPage2.html

主要是为了上传时不会跳转到FileUpload.ashx

这实例来自http://www.luofenming.com 如不懂可以问我我可以免费教你

以下是Htmlpage1.html代码

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
	<meta charset="utf-8" />
</head>
<body>
    上传主图片 :
    <input id="imagepath" type="text" name="imagepath" /><br />
    <iframe src="HtmlPage2.html" name="upload" align="top" frameborder="0" style="height: 53px; width: 400px;"></iframe>
</body>
</html>

以下是Htmlpage2.html代码

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
	<meta charset="utf-8" />
</head>
<body>
    <form method="post" target="upload" action="FileUpload.ashx" enctype="multipart/form-data">
        <input type="file" name="fileUp" />
        <input type="submit" value="上传图片" />
    </form> 
</body>
</html>

以下是FileUpload.ashx代码

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;

namespace Share.AdminWeb.Article
{
    /// <summary>
    /// FileUpload 的摘要说明
    /// </summary>
    public class FileUpload : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/html";
            HttpPostedFile file = context.Request.Files[0];//获取上传的文件
            if (file != null)
            {
                string fileName = Path.GetFileName(file.FileName);//获取文件名GetFileName方法只返回文件名与扩展名
                string fileExt = Path.GetExtension(fileName);//获取扩展名
                string fileToLower = fileExt.ToLower();
                if (fileToLower != "" && (fileToLower == ".jpg"|| fileToLower==".png"|| fileToLower== ".gif"))
                {
                    string newfileName = Guid.NewGuid().ToString();//得到一个随机名
                    string dir = "/images/" + DateTime.Now.ToString("yyyyMMdd") + "/";
                    if (!Directory.Exists(context.Request.MapPath(dir)))//如果没有文件指定的目录就创建
                    {
                        Directory.CreateDirectory(context.Request.MapPath(dir));
                    }
                    string fullDir = dir + newfileName + fileExt;//构建完整的途径包括文件名和扩展名
                    file.SaveAs(context.Request.MapPath(fullDir));//保存文件到完整途径
                    context.Response.Write("OK<script>window.parent.document.getElementById(\"imagepath\").value = \"" + fullDir + "\";window.setTimeout(function () {location.href = 'upload.aspx';}, 2000);</script>");
                }
                else
                {
                    context.Response.Write("请选择要上传的图片,格式为jpg,png,gif<script>window.setTimeout(function () {location.href = 'upload.aspx';}, 2000);</script>");
                }
               
        
            }
            else
            {

            }
                //context.Response.Write("Hello World");
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}