如何從列表對象中刪除空字符串

Question

在設置 Url = r.Link 之前，我想確保 r.link 不是空字符串？

我能在這個代碼片段中做到這一點嗎？

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();

輸出

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

Answer 1

非常簡單，測試 r.Link 並用你需要的任何東西替換它，如果它是空的或空的（或者只是空白，我假設）

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();