asp.net fileupload 使用代码

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<%@ 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>无标题页</title> </head> <body> <form id="form1" runat="server"> <div> <asp:FileUpload ID="FileUpload1" runat="server" /><br /> <br /> <asp:Button ID="btnUpload" runat="server" OnClick="btnUpload_Click" Text="上传" /></div> </form> </body> </html>

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 btnUpload_Click(object sender, EventArgs e) { Boolean fileOk = false; string path = Server.MapPath("~/upload/"); //判断是否已经选取文件 if (FileUpload1.HasFile) { //取得文件的扩展名,并转换成小写 string fileExtension = System.IO.Path.GetExtension(FileUpload1.FileName).ToLower(); //限定只能上传jpg和gif图片 string[] allowExtension = { ".jpg", ".gif" }; //对上传的文件的类型进行一个个匹对 for (int i = 0; i < allowExtension.Length; i++) { if (fileExtension == allowExtension[i]) { fileOk = true; break; } } //对上传文件的大小进行检测，限定文件最大不超过1M if (FileUpload1.PostedFile.ContentLength > 1024000) { fileOk = false; } //最后的结果 if (fileOk) { try { FileUpload1.PostedFile.SaveAs(path + FileUpload1.FileName); Response.Write("<mce:script type=‘text/javascript‘></mce:script>"); } catch { Response.Write("<mce:script type=‘text/javascript‘></mce:script>"); } } else { Response.Write("<mce:script type=‘text/javascript‘></mce:script>"); } } } }

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