.NET下载，有文件源存在。
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public
static void DownLoadFile(string
fileName, HttpResponse Response, HttpServerUtility Server){ string
path = Server.MapPath("~/UpFiles/"
+ fileName); FileInfo fileInfo = new
FileInfo(path); //TextWriter writer = new StreamWriter(defultPath); //HttpResponse Response = new HttpResponse(writer); Response.Clear(); Response.ClearContent(); Response.ClearHeaders(); Response.AppendHeader("Content-Disposition", "attachment; filename=\""
+ Server.UrlEncode(fileName) + "\""); Response.AddHeader("Content-Length", fileInfo.Length.ToString()); Response.AddHeader("Content-Transfer-Encoding", "binary"); Response.ContentType = "application/octet-stream"; Response.ContentEncoding = System.Text.Encoding.UTF8; Response.WriteFile(fileInfo.FullName); Response.Flush(); Response.End();} |
以文本流的方式下载，不存在文件源的方式。
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byte[] tmp = ProServer.XLSIO.ExportExcel(dt, salEnt.NAME);//二进制字符string
fileName = string.Format("{0}.xls", salEnt.NAME);Response.Charset = "UTF-8";Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");Response.ContentType = "application/octet-stream";Response.AddHeader("Content-Disposition", "attachment; filename="
+ Server.UrlEncode(fileName));Response.BinaryWrite(tmp);Response.Flush();Response.End(); |
MVC下载，存在文件源
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public
FileStreamResult DownFile(string
fileid){ using
(DBEntities db = new
DBEntities()) { int
id = Convert.ToInt32(fileid); var
files = db.PS_FILES.SingleOrDefault(k => k.ID == id); string
path = Server.MapPath("~/UpFiles/") + files.PATH; return
File(new
FileStream(path, FileMode.Open), "image/jpeg jpeg jpg jpe", files.NAME); }} |
原文：http://www.cnblogs.com/senyier/p/3671363.html