Question

现在我只得到1个问题ID，我怎样才能获得所有关联的问题id foreach item？

我希望项目输出如下： Item - Text =“itemTitle” Value =“questionID1，questionID2，questionID3等”

感谢您的回答

        string categoryId = "";
        string questionID = "";


        foreach (var item in searchList.resources)
        { 
                foreach (var associatedQuestion in item.associatedQuestions)
                {
                    categoryId = associatedQuestion.categoryid.ToString();

                    questionID = associatedQuestion.id.ToString();

                }

                myList.Add(new SelectListItem { Text = item.linktext.ToString(), Value = categoryId + questionID  });

        }

        return System.Web.Helpers.Json.Encode(myList); 
    }

Answer 1

例如，您可以将String.Join与LINQ结合使用，而不是使用内部的foreach循环。例如：

foreach (var item in searchList.resources)
{ 
        //First convert all questionIds to a string collection
        IEnumerable<String> allQuestionIDs = item.associatedQuestions.Select(q => q.id.ToString());

        //Convert the collection to single comma seperated String
        string questionIdsString = String.Join(", ", allQuestionIDs);

        myList.Add(new SelectListItem { Text = item.linktext.ToString(), Value = questionIdsString });
}

嵌套的ForEach列表

1 个答案: