asp.net FileUpload上传文件
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asp.net FileUpload上传文件
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///?<summary> ?? ????????///?上傳文件 ?? ????????///?</summary> ?? ????????///?<param?name="pf">HttpPostedFile</param> ?? ????????///?<param?name="path">路徑</param> ?? ????????///?<param?name="filename">輸出文件名</param> ?? ????????///?<returns>錯誤信息</returns> ?? ????????public?static?string?UploadFile(HttpPostedFile?pf,string?savepath,?out?string?filename)?? ????????{?? ????????????string?fileExt?=?GetFileExt(pf.FileName);?? ????????????if?(!AllowFileExt(fileExt))?? ????????????{?? ????????????????filename?=?string.Empty;?? ????????????????return?"上傳文件擴展名不被允許";?? ????????????}?? ????????????else?if?(pf.ContentLength?>1048576)?? ????????????{?? ????????????????filename?=?string.Empty;?? ????????????????return?"上傳文件大小不得超過1MB";?? ????????????}?? ????????????? ????????????filename?=?GetNewFileName()?+?"."?+?fileExt;?? ????????????string?path?=?HttpContext.Current.Server.MapPath("~"?+?"/"?+?savepath?+?"/"?+?filename);?? ????????????pf.SaveAs(path);?? ????????????return?string.Empty;?? ????????}?? ?? ????????///?<summary> ?? ????????///?新文件名 ?? ????????///?</summary> ?? ????????///?<returns></returns> ?? ????????public?static?string?GetNewFileName()?? ????????{?? ????????????return?DateTime.Now.ToString("MMddhhmmss");?? ????????}?? ?? ????????///?<summary> ?? ????????///?取得文件擴展名 ?? ????????///?</summary> ?? ????????///?<param?name="filename">文件名</param> ?? ????????///?<returns>擴展名字符串</returns> ?? ????????static?public?string?GetFileExt(string?filename)?? ????????{?? ????????????int?pos?=?filename.LastIndexOf(".");?? ????????????return?filename.Substring(pos?+?1);?? ????????}?? ?? ????????///?<summary> ?? ????????///?取得文件名 ?? ????????///?</summary> ?? ????????///?<param?name="filename"></param> ?? ????????///?<returns>主文件名字符串</returns> ?? ????????static?public?string?GetFileName(string?filename)?? ????????{?? ????????????int?pos?=?filename.LastIndexOfAny(new?char[]?{?'\\',?'/'?});?? ????????????int?pos1?=?0;?? ????????????int?len?=?pos?-?pos1;?? ????????????return?filename.Substring(pos1?+?1,?len);?? ????????}?? ????????///?<summary> ?? ????????///?允許上傳的文件類型 ?? ????????///?</summary> ?? ????????///?<param?name="ext">文件類型</param> ?? ????????///?<returns>是/否</returns> ?? ????????static?public?bool?AllowFileExt(string?ext)?? ????????{?? ????????????try?? ????????????{?? ????????????????string?ex?=?"txt,xls,doc,docx,rar,zip";?? ????????????????foreach?(string?s?in?ex.Split(','))?? ????????????????{?? ????????????????????if?(ext.ToLower()?==?s.ToLower())?? ????????????????????{?? ????????????????????????return?true;?? ????????????????????}?? ????????????????}?? ????????????}?? ????????????catch?{?return?true;?}?? ????????????return?false;?? ????????}?? ?? ?<asp:FileUpload?ID="FileUpload1"?runat="server"?CssClass="fileupload"?/>?? ?? //上傳文件加入數據庫 ?? ?? ?protected?void?Button1_Click(object?sender,?EventArgs?e)?? {?? ????????string?filename?=?"";?? ????????string?msg?=?Common?.UploadFile(FileUpload1.PostedFile,?"upload",?out?filename);?? ????????if?(""?==?msg)?? ????????{?? ????????????attendInfo.AttachUrl?=?filename;//成功 ?? ????????????return?true;?? ????????}?? ????????else?? ????????{?? ????????????Common.ShowMessage(""+msg+"");//失敗 ?? ????????????return?false;?? ????????}??
轉載于:https://www.cnblogs.com/wlly216/archive/2011/09/28/2193957.html
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