FileUpload上传文件

阅读更多

今天花了点时间弄了一下文件上传，以前不会的时候感觉挺难的，现在弄完后感觉蛮简单的！
不多说代码贴出来和大家分享一下：
1 XHTML代码如下：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UploadPic.aspx.cs" Inherits="UploadPic" %>




   


   

   

       

            上传图片

       

            选择图片：
           
       

   

   

2 后台代码如下：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

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

    }
    protected void btnUpload_Click(object sender, EventArgs e)
    {
        //判断是否选择文件
        if (PicUpload.FileName=="")
        {
            ScriptManager.RegisterStartupScript(this, GetType(), "msg", "alert('请选择图片')", true);
            return;
        }
        else
        {
            //获取文件名
            string filename = System.IO.Path.GetExtension(PicUpload.FileName);

            //取的图片路径
            string Pic_path = System.Web.HttpContext.Current.Request.MapPath("~/File/Pic/");

            //获取文件路径
            string Txt_path = System.Web.HttpContext.Current.Request.MapPath("~/File/Txt/");

            if (filename==".jpg"||filename==".gif"||filename==".png")
            {
                //保存图片
                PicUpload.SaveAs(Pic_path + PicUpload.FileName);
                ScriptManager.RegisterStartupScript(this, GetType(), "msg","alert('图片上传成功！')", true);
            }
            else if (filename==".txt")
            {
                //保存文件
                PicUpload.SaveAs(Txt_path + PicUpload.FileName);
                ScriptManager.RegisterStartupScript(this, GetType(), "msg", "alert('文档上传成功！')", true);
            }
            else
            {
                ScriptManager.RegisterStartupScript(this, GetType(), "msg",string.Format("alert('上传失败！请上传.jpg .gif .png .txt 的文件')"), true);
            }
           
        }
    }
}