MVC控制器使用响应流 [英] MVC Controller Using Response Stream

问题描述

我使用MVC 3，我想动态创建一个CSV文件下载，但我不能确定正确的MVC至上的方针。

I'm using MVC 3 I would like to dynamically create a CSV file for download, but I am unsure as to the correct MVC orientated approach.

在传统的ASP.net，我会写这样的：

In conventional ASP.net, I would have written something like:

Response.ClearHeaders();
Response.ContentType = "text/csv";
Response.AddHeader("content-disposition", attachment;filename='Test.csv'");
Response.Write("1,2,3");
Response.End();

我已经看了看ContentResult类型行动，但看来我需要创建的结果作为一个字符串，即

I have looked at the ContentResult action but it appears that I would need to create the result as a string, i.e.

返回内容（MYDATA的，文/ CSV）;

return Content(myData, "text/csv");

我可以，我想，建一个字符串，但由于这些文件可能是几千行代码，这似乎效率不高给我。

I could, I suppose, build a string, but since these files could be several thousand lines long, this seems inefficient to me.

有人能指出我在正确的方向？谢谢你。

Could someone point me in the right direction? Thanks.

推荐答案

我昨天花了类似的问题了一段时间，这里是如何做到这一点正确的方式：

I spent some time on the similar problem yesterday, and here's how to do it right way:

public ActionResult CreateReport()
{
    var reportData = MyGetDataFunction();
    var serverPipe = new AnonymousPipeServerStream(PipeDirection.Out);
    Task.Run(() => 
    {
        using (serverPipe)
        {
             MyWriteDataToFile(reportData, serverPipe)
        }
    });

    var clientPipe = new AnonymousPipeClientStream(PipeDirection.In,
             serverPipe.ClientSafePipeHandle);
    return new FileStreamResult(clientPipe, "text/csv");
}

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