Question

我正在构建一个ASP.net测验引擎，我正在使用我之前在Flash中做过的测验引擎作为ASP版本的模板。我坚持如何在ASP.net中实现以下代码

// array to hold the answers
var arrAnswers:Array = new Array();
// create and array of answers for the given question
arrAnswers[i] = new Array();
// loop through the answers of each question
for (j=0; j<dataXML.question[i].answers.length(); j++) 
{
//array of answers for that given question is pulle from XML data
arrAnswers[i][j] = dataXML.question[i].answers[j].@choice.toString();
// if the given answer is the correct answer then set that value to the arrcorrect 
}

任何人都可以帮助我如何在ASP.net中获得上述动作脚本代码吗？

Answer 1

要直接转换此代码，您将声明一个锯齿状数组，如下所示：

 var answers = new string[questionCount][];

然后，您将使用LINQ to XML初始化外部数组的元素，如下所示：

foreach(var question in data.Elements("Question"))
    answers[i] = question.Elements("Answer").Select(a => a.Value).ToArray();

您也可以在没有循环的情况下执行此操作，如下所示：

var answers = data.Elements("Question")
    .Select(q => q)
    .ToArray();

但是，最好将数组重构为QuizQuestion类ReadOnlyCollection<String> AnswerChoices。

例如：

class QuizQuestion {
    public QuizQuestion(XElement elem) {
        Text = elem.Element("Text").Value;
        AnswerChoices = new ReadOnlyCollection<String>(
            elem.Elements("Answer").Select(a => a.Value).ToArray()
        );
        CorrectAnswerIndex = elem.Attr("CorrectAnswer");
    }
    public string Text { get; private set; }
    public ReadOnlyCollection<String> AnswerChoices { get; private set; }
    public int CorrectAnswerIndex { get; private set;} 
}

修改LINQ to XML代码以适合您的XML格式。

ASP.NET将动作脚本代码转换为ASP等效（2D数组）

1 个答案: