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【CSharp】文件下载

作者:伊菲 / 发布于2014/11/18/ 547


	/// <summary>
	/// 附件下载
	/// </summary>
	/// <param name="attachId">附件ID</param>
	public void DownloadAttach(int attachId)
	{
	 Edu_Attach edu_Attach = edu_AttachService.findById<Edu_Attach>(attachId);
	 if (edu_Attach != null)
	 {
	 HttpContext context = (HttpContext)ctx.web.Context;
	 if (context != null)
	 {
	 string filePathName = PathHelper.Map(sys.Path.DiskPhoto) + edu_Attach.AttachContent.Replace("/static/upload/image", "").Replace("/", "\\");
	 int pos = filePathName.LastIndexOf("\\");
	 string fileName = filePathName.Substring(pos + 1);
	 string UserAgent = context.Request.ServerVariables["http_user_agent"].ToLower();
	 if (UserAgent.IndexOf("firefox") == -1)
	 {
	 //非火狐浏览器
	 context.Response.AddHeader("content-disposition", "attachment;filename=" + HttpUtility.UrlEncode(edu_Attach.AttachName));
	 }
	 else
	 {
	 context.Response.AddHeader("content-disposition", "attachment;filename=" + edu_Attach.AttachName);
	 }
	 FileStream fs = new FileStream(filePathName, FileMode.Open, FileAccess.Read);
	 byte[] bArr = new byte[fs.Length];
	 fs.Read(bArr, 0, bArr.Length);
	 fs.Close();
	 context.Response.ContentEncoding = Encoding.UTF8;
	 context.Response.BinaryWrite(bArr);
	 context.Response.Flush();
	 context.Response.End();
	 }
	 }
	}

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