Question

我有一些数据存储在名为result

的变量中

以下是数据的外观：

public void setMultiAnswer()
{
try
{
    string question = "Question 1"
    responsesList.Add("Answer1");
    responsesList.Add("Answer2");
    questionResponsesList.Add(false);
    questionResponsesList.Add(true);

    using (Entities testEntity = new Entities())
    {
        Question questionObj = new Question();
        questionObj.Question1 = question;
        questionObj.CreatedBy = "test";
        questionObj.CreatedDate = DateTime.Now;

        QuestionRespons questionResponsesObj = new QuestionRespons();
        // fill response
        foreach (var questionResponse in questionResponsesList)
        {
            questionResponsesObj.CorrectResponse = questionResponse;
        }

        questionObj.QuestionResponses.Add(questionResponsesObj);

        Response responseObj = new Response();

        // fill response 
        foreach (var response in responsesList)
        {
             responseObj.Response1 = response;
             responseObj.CreatedBy = "test";
             responseObj.CreatedDate = DateTime.Now;
        }
        questionResponsesObj.Response = responseObj;

        testEntity.Questions.Add(questionObj);
        testEntity.SaveChanges();
    }
}
catch (Exception ex)
{
    Console.Write(ex);
}

我要做的是计算结果的数量，在这种情况下为2

所以我做到了这一点：

警报（result.length）;

但这回归“未定义”..我该怎么做？

Answer 1

尝试此代码可能会以计算对象

的方式工作

  var foo = {"key1": "value1", "key2": "value2", "key3": "value3"};

var count = 0;
for (var k in foo) {
    if (foo.hasOwnProperty(k)) {
       ++count;
    }
}
alert("Found " + count + " properties specific to foo");

从这里开始 How do I count a JavaScript object's attributes?

Javascript对象计数返回undefined

1 个答案: