Rotativa ActionAsPdf背景图像

Question

我正在使用Rotativa ActionAsPDF创建视图的PDF，但是background-image属性不起作用。但是，如果我将Action作为常规视图返回，它确实可以工作。

ReportController：

public ActionResult CertificateAsPdf(int courseid, string type, int owningmtuid, int? attendeeid, int? agencyid, int? canineCertificationId)
{
    return new ActionAsPdf("Certificate", new { courseid = courseid, type = type, attendeeid = attendeeid, owningmtuid = owningmtuid, agencyid = agencyid, canineCertificationId = canineCertificationId })
    {
        FileName = "Certificate.pdf",
        PageOrientation = Rotativa.Options.Orientation.Landscape,
    };
}

public ActionResult Certificate(int courseid, string type, int owningmtuid, int? attendeeid, int? agencyid, int? canineCertificationId)
{
    // Logic to get data
    return View("MTUCertificate", model);
}

MTUCertificateView：

<style>
    .mtulogo {
        background-image: url("@Url.Action("getimage", "mtu", new { area = "dataadministration", path = Model.MTULogoImage })");
        background-size: contain;
        background-position: center;
        background-repeat: no-repeat;
        height: 200px;
    }
</style>

我遇到的问题是背景图片未加载。路径参数Model.MTULogoImage在数据库中保存了UNC，格式为\\ ipaddress \ websitename \ logos \ mtulogo.png

GetImage操作：

public ActionResult GetImage(string path)
{
    string contentType = MimeMapping.GetMimeMapping(Path.GetFileName(path));
    return File(@path, contentType);
}

同样，如果我只返回普通视图，则没有问题，这是当我开始遇到问题时将其更改为return new ActionAsPDF。

Answer 1

我最终通过将UNC路径转换为字节来解决此问题。

更新的操作：

public ActionResult Certificate(int courseid, string type, int owningmtuid, int? attendeeid, int? agencyid, int? canineCertificationId)
{
    //mtu.MTULogoImage below formatted like \\ipaddress\websitename\logos\mtulogo.png
    model.MTULogoImage = System.IO.File.ReadAllBytes(mtu.MTULogoImage);
    model.MTULogoImageContentType = MimeMapping.GetMimeMapping(Path.GetFileName(mtu.MTULogoImage));

    return View("MTUCertificate", model);
}

更新的视图：

.mtulogo {
    background-image: url(@string.Format("data:{0};base64,{1}", Model.MTULogoImageContentType, Convert.ToBase64String(Model.MTULogoImage)));
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    height: 200px;
}