ASP.NET文件上传示例-优快云博客

本文链接：https://blog.youkuaiyun.com/wulingmin21/article/details/7259448

合作开发的另一个问题：上传文件。

WebForm1.aspx：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="UploadTest01.WebForm1" %>

<!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 runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>   
        <asp:Button ID="btn_upload" runat="server" Text="btn_upload" OnClick ="btn_upload_Click" />  
        <asp:FileUpload ID="upload" runat="server" />  
        <br />
        <asp:Label ID="lab_upload" runat="server" Text="lab_upload"></asp:Label>    
    </div>
    </form>
</body>
</html>

WebForm1.aspx.cs：

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 UploadTest01
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        #region 上传文件
        protected void btn_upload_Click(object sender, EventArgs e)
        {
            UploadMethod("~/UpLoadFiles/Files/");
        }

        private void UploadMethod(String UpLoadFilePath)
        {
            bool fileOK = false;

            //文件的上传路径
            string path = Server.MapPath(UpLoadFilePath);

            //判断上传文件夹是否存在，若不存在，则创建
            if (!Directory.Exists(path))
            {
                //创建文件夹 
                Directory.CreateDirectory(path);
            }

            if (upload.HasFile)
            {
                //如果选择了文件则执行

                //获取上传文件的类型
                string fileExtesion = System.IO.Path.GetExtension(upload.FileName).ToLower();
                //获取没有扩展名的文件名
                string result = System.IO.Path.GetFileNameWithoutExtension(upload.FileName);

                //允许上传的类型
                string[] allowExtesions = { ".doc", ".xls", ".rar", ".zip", ".ppt" };
                for (int i = 0; i < allowExtesions.Length; i++)
                {
                    if (fileExtesion == allowExtesions[i])
                    {
                        //文件格式正确 允许上传
                        fileOK = true;
                    }
                }

                if (fileOK)
                {
                    try
                    {
                        //以时间命名
                        string newname = System.DateTime.Now.ToString("yyyyMMddHHmmssffff");//声称文件名，防止重复

                        newname = result + newname + fileExtesion;
                        upload.PostedFile.SaveAs(path + newname);

                        Session["filename"] = newname;
                        lab_upload.Text = "上传成功";
                    }
                    catch (Exception)
                    {

                        lab_upload.Text = "上传失败";
                        //throw ex;
                    }
                }
                else
                {
                    lab_upload.Text = "上传文件类型错误";
                }
            }
            else
            {
                //尚未选择文件
                lab_upload.Text = "尚未选择任何文件，请选择文件";
                return;
            }
        }
        #endregion

    }
}

通过UploadMethod方法，传入要上传的路径，就可以把文件上传到指定的目录下。