ASP.NET上传下载文件

上传文件：

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.IO; #region 上传文件 /// <summary> /// 上传文件 /// </summary> /// <param name="UpLoadFilePath">上传位置</param> /// <param name="strTime">当前时间（加时间重命名文件，防止重复）</param> /// <param name="upload">上传控件</param> private void UploadMethod(String UpLoadFilePath, string strTime,FileUpload upload) { bool fileOK = false; //文件的上传路径 string path = Server.MapPath(UpLoadFilePath); //判断上传文件夹是否存在，若不存在，则创建 if (!Directory.Exists(path)) { //创建文件夹 Directory.CreateDirectory(path); } //如果选择了文件则执行 if (upload.HasFile) { //获取上传文件的类型 string fileExtesion = System.IO.Path.GetExtension(upload.FileName).ToLower(); //获取没有扩展名的文件名 string result = System.IO.Path.GetFileNameWithoutExtension(upload.FileName); //允许上传的类型 string[] allowExtesions = { ".doc", ".xls", ".rar", ".zip", ".ppt" }; for (int i = 0; i < allowExtesions.Length; i++) { if (fileExtesion == allowExtesions[i]) { //文件格式正确 允许上传 fileOK = true; } } if (fileOK) { try { string newname = result + strTime + fileExtesion; upload.PostedFile.SaveAs(path + newname); Session["filename"] = newname; } catch (Exception) { Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('上传失败！');</script>"); } } else { Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('上传失败！');</script>"); } } else { //尚未选择文件 Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('尚未选择任何文件，请选择文件！');</script>"); return; } } #endregion

下载文件：

 using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.IO; using System.Text.RegularExpressions;/// <summary> /// 下载文件 /// </summary> /// <param name="downloadfilepath">文件路径</param> private void DownloadMethod(string downloadfilepath) { string path = Server.MapPath(downloadfilepath); Regex re = new Regex(@"\w*\.\w*"); string st = re.Match(path).Value.ToString(); string fileName = st; //客户端保存的文件名 FileInfo fileInfo = new FileInfo(path); Response.Clear(); Response.ClearContent(); Response.ClearHeaders(); Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName); Response.AddHeader("Content-Length", fileInfo.Length.ToString()); Response.AddHeader("Content-Transfer-Encoding", "binary"); Response.ContentType = "application/octet-stream"; Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312"); Response.WriteFile(fileInfo.FullName); Response.Flush(); Response.End(); }

调用：

    UploadMethod(DocPath,strTime,fileUpload);

    DownloadMethod(filePath);