文件上传功能

最新推荐文章于 2024-09-18 10:20:32 发布

转载最新推荐文章于 2024-09-18 10:20:32 发布 · 1.5k 阅读

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#upload #server #asp #string #exception #bt

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转载地址：http://blog.youkuaiyun.com/21aspnet/archive/2007/04/01/1548696.aspx

1、简单文件上传实现

后台的代码：

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; 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("images/") + filename; 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(); } } }

前台的代码：

<table style="width: 343px"> <tr> <td style="width: 100px"> 单文件上传</td> <td style="width: 100px"> </td> </tr> <tr> <td style="width: 100px"> <asp:FileUpload ID="FileUpload1" runat="server" Width="475px" /> </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: 100px; height: 21px;"> <asp:Label ID="lb_info" runat="server" ForeColor="Red" Width="183px"></asp:Label></td> <td style="width: 100px; height: 21px"> </td> </tr> </table>

2、多文件上传实现

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; 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) { if ((FileUpload1.PostedFile.FileName == "" && FileUpload2.PostedFile.FileName == "")&&FileUpload3.PostedFile.FileName == "") { this.lb_info.Text = "请选择文件！"; } else { HttpFileCollection myfiles = Request.Files; for (int i = 0; i < myfiles.Count; i++) { HttpPostedFile mypost = myfiles[i]; try { if (mypost.ContentLength > 0) { string filepath = mypost.FileName; string filename = filepath.Substring(filepath.LastIndexOf("//") + 1); string serverpath = Server.MapPath("images/") + filename; mypost.SaveAs(serverpath); this.lb_info.Text = "上传成功！"; } } catch (Exception error) { this.lb_info.Text = "上传发生错误！原因：" + error.ToString(); } } } } }

前台代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.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>多文件上传清清月儿http://blog.youkuaiyun.com/21aspnet/</title> </head> <body> <form id="form1" runat="server"> <div> <table style="width: 343px"> <tr> <td style="width: 100px"> 多文件上传</td> <td style="width: 100px"> </td> </tr> <tr> <td style="width: 100px"> <asp:FileUpload ID="FileUpload1" runat="server" Width="475px" /> </td> <td style="width: 100px"> </td> </tr> <tr> <td style="width: 100px"> <asp:FileUpload ID="FileUpload2" runat="server" Width="475px" /></td> <td style="width: 100px"> </td> </tr> <tr> <td style="width: 100px"> <asp:FileUpload ID="FileUpload3" runat="server" Width="475px" /></td> <td style="width: 100px"> </td> </tr> <tr> <td style="width: 100px"> <asp:Button ID="bt_upload" runat="server" OnClick="bt_upload_Click" Text="一起上传" /> <asp:Label ID="lb_info" runat="server" ForeColor="Red" Width="183px"></asp:Label></td> <td style="width: 100px"> </td> </tr> </table> </div> </form> </body> </html>