Mvc 文件下载

 

 

//a 链接方式下载
<a target="_blank" href="/DownLoad/Load">下载</span>

//Js方式下载
function toload() {
    window.open("DownLoad/Load");
}

//Action内部方法
public FilePathResult Load(string filePath)
{
　　　

　　　　string fileName = ba.adviceAttachment.Substring(1, ba.adviceAttachment.Length - 1);
　　　　string FilePath = Path.Combine(Server.MapPath("~/"), fileName.Replace(@"/", "\\"));

　　　　string[] files = ba.adviceAttachment.StringSplit("@@");
　　　　string fileName1 = files[1];

　　　　HttpResponse response = System.Web.HttpContext.Current.Response;
　　　　response.Clear();
　　　　response.Charset = "UTF-8";  //指定编码
　　　　response.ContentType = "application/octet-stream";
　　　　System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment; filename=" + HttpUtility.UrlEncode(fileName1)));   //防止中文乱码

　　　　return File(FilePath, "application/octet-stream", fileName1);  //正式

return File("F:/UpLoad/Tmp/Wildlife.wmv", "application/octet-stream", "Wildlife.wmv");  //解释上边一句
}

//----------------------------------------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------------------------------------

 2015-05-12 22：04 补充内容

//action        
public FileStreamResult ToDownLoad(int Id)
        {
            string virtulPath = "~/UpLoad/BusinessAdvice/潘超.txt";
            string physicsPath = Server.MapPath(virtulPath);
            FileStream fs = new FileStream(physicsPath, FileMode.Open);
            return File(fs, "text/plain", "潘超.txt");
        }

//页面上下载方法 
//注意事项：url 和 window.location 地址要保存一致
//经验证，这种方式会访问两次action
function toLoad() {
        $.ajax({
            type:'post',
            url: "Home/ToDownLoad?Id=1",
            success:function() {
                window.location = "Home/ToDownLoad?Id=1";
            }
        });
    }

 网上找到的，比较容易理解：