渲染图像从MVC控制器屏幕 [英] Render image to the screen from MVC controller

问题描述

我在数据库中的图像，我想返回到图像从一个动作观看​​。这里是我的行动。

I have images in the database and I want to return the image for viewing from an action. Here's my action.

public FileContentResult Index(ItemImageRequest request)
{
    var result = queueService.GetItemImage(request);

    if (result.TotalResults == 0)
        return File(new byte[0], "image/jpeg");

    var image = result.FirstResult;

    return File(image.Image, "image/tif");
}

我也试过这code

I have also tried this code

public FileStreamResult Index(ItemImageRequest request)
{
    //retrieval omitted

    var image = result.FirstResult;

    System.IO.Stream stream = new System.IO.MemoryStream(image.Image);

    return new FileStreamResult(stream, "image/tif");
}

当我去我的动作在浏览器中它会提示我要下载。我不希望它来下载，我希望它在浏览器中显示。我如何做到这一点？

When I go to my action in the browser it prompts me for download. I don't want it to download, I want it to show in the browser. How do I accomplish this?

推荐答案

如果您使用返回Controller.File（文件名，...），你会返回一个FilePathResult，这可能不是你想要的东西 - 我假设你的样品中形象是一个图像文件名（其中'变种'没有任何人帮助的情况......）

If you use return Controller.File(filename, ...), you'll return a FilePathResult, which probably isn't what you want - I'm assuming that 'image' in your sample is an image filename (a case where 'var' isn't helping anyone...)

如果您使用其他文件重载之一，或者直接使用FileContentResult或FileStreamResult，你会得到你想要的效果。

If you use one of the other File overloads, or use FileContentResult or FileStreamResult directly, you'll get the effect you want.

您不必使自定义的ActionResult类（当然，它可能是由于其他原因是有用的。）

You don't need to make a custom ActionResult class (though of course, it might be useful for other reasons.)

然而，刚刚写了这一切，我已经意识到，你的问题是，TIFF是不是该浏览器可以随时（永远？）显示器内部，这可能是为什么他们提示输入文件格式下载。

您需要将它重新渲染为PNG或东西在服务器上浏览器中显示。

You will need to re-render it to a PNG or something on the server to display in a browser.

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