Question

我正在使用网络表单构建一个Web应用程序，并且我试图在会话中存储一个计数器，但我收到的错误是if（！IsPostback）没有存在于当前的背景下。任何人都可以帮我解决这个问题吗？

protected void Page_Load(object sender, EventArgs e)
{
        if(!IsPostback)
{
Session["AttemptCount"] = 0;
}

}

  protected void submitAnswerButton_Click(object sender, EventArgs e)
    {



        //difficultyList.SelectedIndex = 2;
        answerStatus.Visible = true;


        int answer = randomNumber1 + randomNumber2;
        int counter = (int)Session["AttemptCount"];
        if (mathAnswerTextBox.Text == answer.ToString())
        {
  counter++;
            Session["AttemptCount"] = counter;

            answerStatus.Text = "Correct!";


           // scoreLabel.Text = "Score: " + counter.ToString();
            randomNumber1 = random.Next(0, 50);
            randomNumber2 = random.Next(0, 50);
            num1Label.Text = Convert.ToString(randomNumber1);//add this line 
            num2Label.Text = Convert.ToString(randomNumber2); //and this line
            num1Label.Visible = true;
            num2Label.Visible = true;
            mathAnswerTextBox.Visible = true;

            submitAnswerButton.Visible = true;
        }
        else if (mathAnswerTextBox.Text != answer.ToString())
        {

            answerStatus.Text = "Incorrect";

            incorrectStrikes.Text = counter.ToString();
            num1Label.Visible = true;
            num2Label.Visible = true;
            mathAnswerTextBox.Visible = true;
            submitAnswerButton.Visible = true;
        //    scoreLabel.Text = counterArray[0].ToString();

        }

Answer 1

正如我之前在对您的问题的评论中提到的，您的原始问题是在回发中使用小写 b 。你的“AttemptCount”会话变量没有递增的原因是因为你的if语句只增加它：

if (mathAnswerTextBox.Text == answer.ToString())

我想你想在你的if语句的else子句中这样做，而不是在答案是正确的时候。

if（！IsPostback）在当前上下文中不存在

1 个答案: