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改变FileUpload文件上传控件的显示方式，选择文件后自动上传

2024-07-11 05:12:07   223人阅读

一、Aspx页面：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="FileUploadDemo.aspx.cs" Inherits="WebApplication1.FileUploadDemo" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head id="Head1" runat="server">    <title></title>    <style type="text/css">        .button{ cursor:pointer; background-color:#1481E6;border:1px solid #fff;text-align:center;height: 25px;color:#fff;line-height:19px;}    </style>    <script type="text/javascript">        function uploadFile(filePath) {            if (filePath.length > 0) {                __doPostBack(‘btnUploadFile‘, ‘‘);            }        }    </script></head><body>    <form id="form1" runat="server">    <div style="position: absolute; z-index: 2; cursor: pointer;">        <asp:FileUpload ID="fileUpload" runat="server" Style="filter: alpha(opacity=0); opacity: 0; cursor: pointer;" Width="70px" Height="25px" onchange="uploadFile(this.value)" accept="image/*" />    </div>    <div style="position: absolute; z-index: 1; cursor: pointer; height: 25px;">        <input type="button" name="btnUploadFile" id="btnUploadFile" runat="server" value="上傳新檔案" class="button" />    </div>    </form></body></html>

二、Aspx后台代码：

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.IO;namespace WebApplication1{    public partial class FileUploadDemo : System.Web.UI.Page    {        protected void Page_Load(object sender, EventArgs e)        {            btnUploadFile.ServerClick += new EventHandler(btnUploadFile_ServerClick);        }        void btnUploadFile_ServerClick(object sender, EventArgs e)        {            if (this.fileUpload.HasFile)            {                string fileName = this.fileUpload.PostedFile.FileName;                  // 客户端文件路径                string extension = System.IO.Path.GetExtension(fileName);                if (extension.ToLower() != ".jpg" && extension.ToLower() != ".png")                {                    ScriptManager.RegisterStartupScript(this, this.GetType(), "msg", "alert(‘只允许jpg 和 png！‘);", true);                    return;                }                string pathBase = "D:\\UploadFile";                if (!Directory.Exists(pathBase))                    Directory.CreateDirectory(pathBase);                string webFilePath = Path.Combine(pathBase, fileName); // 数据库保存文件路径（相对全路径）                this.fileUpload.SaveAs(webFilePath);  // 使用 SaveAs 方法保存文件                ScriptManager.RegisterStartupScript(this, this.GetType(), "msg", "alert(‘上傳成功，我們會盡快進行核對！‘);", true);            }        }    }}

参考：http://www.cnblogs.com/Charles2008/archive/2008/07/20/1247084.html


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