如何从列表对象中删除空字符串

Question

Before I set Url = r.Link I want to make sure r.link is not empty string?

Would I be able to do that in this code snippet?

target.RelatedArtifact = template.References.Select(r => new RelatedArtifact()
            {
                Type = r == template.References.First() ? RelatedArtifact.RelatedArtifactType.DerivedFrom : RelatedArtifact.RelatedArtifactType.Citation,
                Display = StripHtml(r.Text).Replace(" .", ".").Replace(" ®", "®") /* Html stripping artifact in <em></em> */,
                Url = r.Link
            }).ToList();

Output

<relatedArtifact>
    <type value="citation" />
    <display value="sss, et al. ss. s;2(2):2." />
    <url value="" /> shouldn't have this tag?
</relatedArtifact>

Answer 1

very simply, test r.Link and replace it with whatever you need if is null or empty (or just white space, I assume)

target.RelatedArtifact = template.References.Select(r => new RelatedArtifact()
            {
                Type = r == template.References.First() ? RelatedArtifact.RelatedArtifactType.DerivedFrom : RelatedArtifact.RelatedArtifactType.Citation,
                Display = StripHtml(r.Text).Replace(" .", ".").Replace(" ®", "®") /* Html stripping artifact in <em></em> */,
                Url = string.IsNullOrWhiteSpace(r.Link)? SOME_MEANINGFUL_VALUE : r.Link
            }).ToList();