我有两个组合框，我希望用户在其中计算流程的总时间

Question

//目前组合框的格式为 hh:mm，我知道我没有将它们从组合框正确转换为 DateTime.Parse，任何帮助都会很棒！！

    private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
    {
        string start = comboBox2.SelectedItem;
        starttime = DateTime.Parse(start);

    }

    private void comboBox3_SelectedIndexChanged(object sender, EventArgs e)
    {
        string end = comboBox3.SelectedItem;
        endtime = DateTime.Parse(end);

    }

    private void button2_Click(object sender, EventArgs e)
    {
        double z;

        z = endtime - starttime;
        textBox1.Text = z.ToString();
    }

Answer 1

string format = "hh:mm"
DateTime dateTime = DateTime.ParseExact(comboBox.Text, format, CultureInfo.InvariantCulture);

尝试将其解析为 dateTime :)

顺便说一句，ComboBox.SelectedItem 不是 return 字符串，所以如果您不打算阅读文本属性，请务必调用 SelectedItem.ToString() .

我有两个组合框，我希望用户在其中计算流程的总时间

I have two combo Boxes where I want users to calculate a total time for a process

c#

visual-studio-2010

visual-studio

visual-studio-2012