/// <summary>

/// 下载

/// </summary>

/// <param name="url"></param>

/// <returns></returns>

public static bool DownLoadFile(string url)

{

var flag = false;

try

{

var filePath = HttpContext.Current.Server.MapPath(url); //获取文件的路径

var file = new FileInfo(filePath); //得到文件

if (file.Exists) //判断文件是否存在

{

HttpContext.Current.Response.Clear(); //清空Response对象

/*设置浏览器请求头信息*/

HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(file.Name)); //指定文件

HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString()); //指定文件大小

HttpContext.Current.Response.ContentType = "application/application/octet-stream"; //指定输出方式

HttpContext.Current.Response.WriteFile(file.FullName); //写出文件

HttpContext.Current.Response.End(); //结束Response对象

HttpContext.Current.Response.Flush(); //输出缓冲区(刷新Response对象)

HttpContext.Current.Response.Clear(); //清空Response对象

flag = true;

}

else

{

flag = false;

}

}

catch (Exception)

{

flag = false;

}

return flag;

}