ASP.NET文件上传收藏-优快云博客

本文链接：https://blog.youkuaiyun.com/simoGAO/article/details/4330377

本文介绍了一个简单的ASP.NET文件上传实例，展示了如何使用FileUpload控件实现文件选择及上传功能，并通过C#代码处理文件的保存路径及上传过程。

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页面代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="index.aspx.cs" Inherits="_Default" %>
<!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> 无标题页 </title>
</head>
<body>
        <form id="form1" runat="server">
        <div>
          <table style= "width:343px">
                        <tr>
                                <td style="width: 97px ; height: 21px;">
                                        单文件上传 </td>
                                <td style="width: 100px ; height: 21px;">
                                </td>
                        </tr>
                        <tr>
                                <td style="width: 97px ">
                                        <asp:FileUpload ID= "FileUpload1" runat="server" Width= "370px" />
                                        </td>
                                <td style= "width:100px ">
                                        <asp:Button ID= "bt_upload" runat="server" OnClick= "bt_upload_Click" Text= "上传"/> </td>
                        </tr>
                        <tr>
                                <td style="width:97px;height:11px; ">
                                        <asp:Label ID= "lb_info" runat="server" ForeColor= "Red " Width= "183px"> </asp:Label> </td>
                                <td style="width:100px;height:11px ">
                                </td>
                        </tr>
                </table>

</div>
</form>
</body>
</html>
后台代码：

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

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

    }
    protected void bt_upload_Click(object sender, EventArgs e)
    {
        try
        {
            if (FileUpload1.PostedFile.FileName =="")
            {
                this.lb_info.Text = "请选择文件！ ";
            }
            else
            {
                string filepath = FileUpload1.PostedFile.FileName;
                string filename = filepath.Substring(filepath.LastIndexOf("//") + 1);
                string serverpath = Server.MapPath("upload/") + filename;   //这里设置文件的保存路径
                FileUpload1.PostedFile.SaveAs(serverpath);
                this.lb_info.Text = "上传成功！ ";
            }
        }
        catch (Exception ex)
        {
            this.lb_info.Text = "上传发生错误！原因是： " + ex.ToString();
        }
    }
}