如何在C#中获取SharePoint术语的所有子项？

您需要从您的字段中获取TaxonomyValue

然后,您必须获取当前的TaxonomySession,然后使用TaxonomySession获取字段中使用的术语.从该术语开始,您可以使用Parent字段获取父Term.
这里有一些粗略的代码向您展示所使用的对象.

TaxonomyFieldValue v = null; // Notsurehowtodothisbit();
        TaxonomySession session = new TaxonomySession(site);
        if (session.TermStores != null && session.TermStores.Count > 0)
        {

            TermStore termStore = session.TermStores[0];
            Term t = termStore.GetTerm(v.TermGuid);
            Term parentTerm = t.Parent;   
            TermCollection childTerms = t.GetTerms();
        }

获得树之后,您可以使用caml查询生成SPList.GetList查询,该查询会返回标记为该方式的任何内容.

我没有在这方面做过实验……
但是Bart-Jan Hoeijmakers有

private SPListItemCollection GetItemsByTerm(Term term,SPList list)
    {
        // init some vars    SPListItemCollection items = null;    
        SPSite site = SPContext.Current.Site;     // set up the TaxonomySession    
        TaxonomySession session = new TaxonomySession(site);
        // get the default termstore    TermStore termStore = session.TermStores[0];   
        // If no wssid is found,the term is not used yet in the sitecollection,so no items exist using the term   
        int[] wssIds = TaxonomyField.GetWssIdsOfTerm(SPContext.Current.Site,termStore.Id,term.TermSet.Id,term.Id,false,1);
        if (wssIds.Length > 0)
        {
            // a TaxonomyField is a lookupfield. Constructing the SPQuery       
            SPQuery query = new SPQuery();
            query.Query = String.Format("<Where><Eq><FieldRef Name='MyTaxonomyField' LookupId='TRUE' /><Value Type='Lookup'>{0}</Value></Eq></Where>",wssIds[0]);
            items = list.GetItems(query);
        }
        return items;
    }