MVC3中如何实现文件下载？

[OnlyAndy]

如题，点击按钮就下载一个文件。跪求指教
建库建表建视图模型的就不必了，来个简单点的例子就行了

[骑猪看海]

你在webform中怎么做的,MVC里也一样

[OnlyAndy]

public void XiaZai(object sender, EventArgs e)
{
string fileName = "QQ五笔.exe";//客户端保存的文件名
string filePath = Server.MapPath("../../DownLoad/QQWubi_Setup.exe");//路径

FileStream fs = new FileStream(filePath, FileMode.Open);
byte[] bytes = new byte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
Response.Charset = "UTF-8";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
Response.ContentType = "application/octet-stream";

Response.AddHeader("Content-Disposition", "attachment; filename="+ fileName);
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
}

这是我在控制器里的Action，可以读到那个文件，但就是不弹出下载框，运行完就没反应了。我哪里写错了？

[SomethingJack]

http://q.cnblogs.com/q/8061/

[OnlyAndy]

这个太复杂了点，有没有更简单的？直接给我后台控制器和前台View的代码就好

[骑猪看海]

public ActionResult File(){
string fileName = "QQ五笔.exe";//客户端保存的文件名
string filePath = Server.MapPath("../../DownLoad/QQWubi_Setup.exe");//路径

FileStream fs = new FileStream(filePath, FileMode.Open);
byte[] bytes = new byte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
Response.Charset = "UTF-8";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
Response.ContentType = "application/octet-stream";

Response.AddHeader("Content-Disposition", "attachment; filename="+ fileName);
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
return new EmptyResult();
}

[OnlyAndy]

问题已解决，谢谢！

[zgjsczwj]

怎么解决的？我现在也是这个情况

[oShiHuai123456]

为啥我用了以后没有效果呢
var newPath = this.Server.MapPath(filePath);
FileStream fs = new FileStream(newPath, FileMode.Open);
byte[] bytes = new byte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
Response.Charset = "UTF-8";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
Response.ContentType = "application/octet-stream";

Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
return new EmptyResult();

[wangbaogang]

现在文件名乱码

[坐看昀起]

引用 9 楼 wangbaogang 的回复:

现在文件名乱码

public ActionResult DownLoad()
        {
            //插件名称
            string fileName = "虎视视频控件_Setup(v2.6.0.0).exe";
            //文件路径
            string filePath = Server.MapPath("../Video/虎视视频控件_Setup(v2.6.0.0).exe");
            FileStream fs = new FileStream(filePath,FileMode.Open);
            byte[] bytes = new byte[(int)fs.Length];
            fs.Read(bytes, 0, bytes.Length);
            fs.Close();
            Response.Charset = "UTF-8";
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
            Response.ContentType = "application/octet-stream";
//解决文件名乱码问题            
Response.AddHeader("Content-Disposition","attachment;filename="+Server.UrlEncode(fileName));
            Response.BinaryWrite(bytes);
            Response.Flush();
            Response.End();
            return new EmptyResult();
        }

[「已注销」]

文件上下载，收藏。

[fy_zhu93]

引用

public ActionResult File(){ string fileName = "QQ五笔.exe";//客户端保存的文件名 string filePath = Server.MapPath("../../DownLoad/QQWubi_Setup.exe");//路径 FileStream fs = new FileStream(filePath, FileMode.Open); byte[] bytes = new byte[(int)fs.Length]; fs.Read(bytes, 0, bytes.Length); fs.Close(); Response.Charset = "UTF-8"; Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8"); Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment; filename="+ fileName); Response.BinaryWrite(bytes); Response.Flush(); Response.End(); return new EmptyResult(); }

在文件比较大的时候，比如200M 500M，或者更大的时候怎么处理

[xh91900]

求大神救命，怎么让用户自己选择保存的路径呢？

[chjiamin]

搞的这么麻烦，MVC很简单的啊。 [HttpGet] public FilePathResult GetFile(){ return File(。。。。。。); }