[:de]ASP.NET Core Controller: Textdatei bereitstellen[:en]ASP.NET Core Controller: Return text file[:]

Last Updated on 2018-10-23.

[:en]By default, returning a binary file via a Controller’s method is quite simple, like:

[Route("Dynamic/{token}")]
public IActionResult Dynamic(String token)
{
    var item = cache.Where(o => o.Token == token).FirstOrDefault();

    //jpg, png
    if (item.ImageBytes != null)
        return File(item.ImageBytes, "image/" + item.ImageType);
}

However, this does NOT work if you try to return a text file like XML or an SVG image. It will end up in a Controller error.

Solution

Convert the text to binary:

[Route("Dynamic/{token}")]
public IActionResult Dynamic(String token)
{
    var item = cache.Where(o => o.Token == token).FirstOrDefault();

    //jpg, png
    if (item.ImageBytes != null)
        return File(item.ImageBytes, "image/" + item.ImageType);

    //svg
    return File(Encoding.UTF8.GetBytes(item.ImageXML),
        "image/"+item.ImageType);
}

 

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