遍历集合并在List<;T>;
本文关键字:lt gt List 集合 合并 遍历 | 更新日期: 2023-09-27 18:20:30
我有以下类:-
public class SiteMapSection
{
public string sectionUrl { get; set; }
public List<SiteMapSubSection> subSection { get; set; }
}
public class SiteMapSubSection
{
public string subSectionUrl { get; set; }
public List<SiteMapArticle> article { get; set; }
}
public class SiteMapArticle
{
public string url { get; set; }
}
我使用SiteMapSection类作为列表中的类型:-
List<SiteMapSection> siteMapSection = new List<SiteMapSection>();
现在,我正试图在"siteMapSection"列表中添加项目,如下所示:-
foreach (var section in sections)
{
.....
siteMapSection.Add(new SiteMapSection { sectionUrl = section.Url });
.....
foreach (var subsection in subsections)
{
.....
siteMapSection.Add(new SiteMapSubSection { ??stuck_here?? });
.....
var articles = GetNextArticles(0, subSectionId, true, false);
.....
foreach(var article in articles)
{
siteMapSection.Add(new SiteMapArticle { ??stuck_here?? });
}
}
}
如何在List-siteMapSection中迭代集合并添加项。
更新的代码,这也不起作用,我只看到siteMapSection。添加(短信)项已添加,但其他嵌套项仍然为空
List<SiteMapSection> siteMapSection = new List<SiteMapSection>();
SectionArticle sa = new SectionArticle();
foreach (BE.Section section in Sections.Find(websiteId, parentSectionId))
{
int sectionId = section.Id;
var sms = new SiteMapSection();
sms.sectionUrl = Sections.VirtualPath(section) + ".aspx";
var _subsections = new List<SiteMapSubSection>();
foreach (BE.Section subsection in Sections.Find(websiteId, sectionId))
{
int subSectionId = subsection.Id;
var smss = new SiteMapSubSection();
smss.subSectionUrl = Sections.VirtualPath(subsection) + ".aspx";
var articles = sa.GetArticlesForSection(websiteId, subSectionId, 10);
var _articles = new List<SiteMapArticle>();
foreach (var article in articles)
{
var sma = new SiteMapArticle();
sma.url = article.Code + ".aspx";
_articles.Add(sma);
}
_subsections.Add(smss);
}
siteMapSection.Add(sms);
}
我刚刚意识到您正在尝试向List<SiteMapSection>
添加不同的类型。不能将不同类型添加到泛型列表中。创建列表时,您正在定义列表中允许的类型,当您尝试添加不同的类型时。
您需要更改
siteMapSection.Add(new SiteMapSubSection { ??stuck_here?? });
至
siteMapSection.Add(new SiteMapSection { ??stuck_here?? });
如果你提供更多的上下文,也许我们可以给你一个更好的方法。
希望这能有所帮助。
foreach (var section in sections)
{
.....
var sms = new SiteMapSection { sectionUrl = section.Url };
sms.subSection = new List<SiteMapSubSection>();
.....
foreach (var subsection in subsections)
{
.....
var smss = new new SiteMapSubSection { subsection }
ssms.article = new List<SiteMapArticle>();
.....
var articles = GetNextArticles(0, subSectionId, true, false);
.....
foreach(var article in articles)
{
smss.article.Add(new SiteMapArticle { article });
}
sms.subSection.Add(ssms);
}
siteMapSection.Add(sms);
}