using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.IO; public partial class upload : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void btupload_Click(object sender, EventArgs e) { if (FileUpload1.HasFile) { string filecontentType = FileUpload1.PostedFile.ContentType; if (filecontentType == "image/bmp" || filecontentType == "image/gif" || filecontentType == "image/pjpeg" || filecontentType == "image/jpeg") { string name = FileUpload1.PostedFile.FileName; FileInfo file = new FileInfo(name); string filename = file.Name; string webFilePath = Server.MapPath("image/" + filename); if (!File.Exists(webFilePath)) { try { FileUpload1.SaveAs(webFilePath); this.lmsg.Text = "提示：文件" + filename + "上传成功！"; this.lpathInfo.Text = "image/" + filename; this.iPic.ImageUrl = "image/" + filename; } catch (Exception ex) { this.lmsg.Text = "提示文件上传失败，失败原因" + ex.Message; } } else { this.lmsg.Text = "该文件已经存在！"; } } else { this.lmsg.Text = "提示：文件类型不符"; } } } }
前台代码如下：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="upload.aspx.cs" Inherits="upload" %>
<!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>
<table>
<tr>
<td><asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="btupload" runat="server" onclick="btupload_Click" Text="上传" /> <asp:Image
ID="iPic" ImageUrl="" Height="100px" runat="server" />
</td>
</tr>
<tr><td>
<asp:Label ID="lmsg" runat="server" Text="Label"></asp:Label>
<asp:Label ID="lpathInfo" runat="server" Text="Label"></asp:Label>
</td></tr>
</table>
</div>
</form>
</body>
</html>
文件下载代码