protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//创建一个HistoryTestInfo对象，保存到Session中
//此对象用于保存用户做题的历史信息
Session["scoreInfo"] = new HistoryTestInfo();
//随机生成一个题目
GenerateTestInfo();
}
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
//是否视图状态中有题目
if (ViewState["curTest"] == null)
{
return;
}
//去掉首尾空格查看用户是否输入了答案
if (txtUserInput.Text.Trim().Length == 0)
{
lblPrompt.Text = "请在文本框中输入答案后再提交。";
txtUserInput.Focus(); //焦点回到文本框
return;
}
int result = Convert.ToInt32(txtUserInput.Text.Trim());
TestInfo test = ViewState["curTest"] as TestInfo;
HistoryTestInfo obj = Session["scoreInfo"] as HistoryTestInfo;
//做题总数增一
obj.TestCount++;
//做对了
if (result == test.CorrectAnswer)
{
lblPrompt.Text = "提示：您做对了，真棒！继续努力！";
//正确题目总数增一
obj.CorrectCount++;
}
else //没做对
{
lblPrompt.Text = "提示：" + test.MathExpression + "=" + test.CorrectAnswer.ToString() + "，提交的计算结果为" + txtUserInput.Text.Trim() + "， 答案不对。";
}
//显示统计信息
string staticsInfo = "答题统计：一共做了{0}题，其中做对的{1}题，正确率为{2}%。";
staticsInfo = string.Format(staticsInfo, obj.TestCount, obj.CorrectCount, (float)obj.CorrectCount / (float)obj.TestCount * 100);
lblStatistic.Text = staticsInfo;
//继续做下一题
GenerateTestInfo();
}