我被撞成两行 [英] i was struk in two line

问题描述

protected void Timer1_Tick(object sender, System.EventArgs e)
	{
		DateTime mydate2 = DateTime.Now;
		DateTime mydate3 = default(DateTime);

		try {
            mydate3 = (mydate - mydate2).ToString();
			this.Label5.Text = "Time Left: " + mydate3.ToShortTimeString();
		} catch (Exception ex) {
			this.Label5.Text = "Error Setting up the Timer. Contact Admin";
		}

        
		if (mydate3.ToShortTimeString() == "00:00:00") {
			int marks = 0;
			Session["Answered"]=dt ;

			foreach (object x_loopVariable in dt.Rows) {
				 x=x_loopVariable ;
				if (x("Selected") + 1 == x("correct")) {
					marks += 1;

				}
			}

我在此代码中出现错误:

I got errors in this code:

mydate3 = (mydate - mydate2).ToString();

foreach (object x_loopVariable in dt.Rows) {
				 x=x_loopVariable ;
				if (x("Selected") + 1 == x("correct")) {
					marks += 1;

推荐答案

mydate3 = (mydate - mydate2).ToString(); // ToString returns a String.

mydate3 是DateTime 尝试为其分配String .

mydate3 is a DateTime and you are trying to assign a String to it.

if (x("Selected") + 1 == x("correct")

您可能需要将x("Selected")和x("correct")明确转换为int s.它们现在是object s.

You might need to explicitly convert x("Selected") and x("correct") to ints. They are now objects.

if (Convert.ToInt32(x("Selected")) + 1 == Convert.ToInt32(x("correct"))

c#中的索引访问器位于方括号之间，而不是括号=>

Index accessors in c# are between brackets and not parenthesis =>

if (Convert.ToInt32(x["Selected"]) + 1 == Convert.ToInt32(x["correct"])

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