事件处理程序何时更新控件的内容？ C＃，WPF

Question

I have this silly C# code on a buttonClick (WPF) handler and i wonder why the text box shows only the last value(=0) and no the previous values(9-1) . When I tested the code to a console application I saw all values in the command line.(I am beginner to C#,WPF)

Thnx

private void clock_Click(object sender, RoutedEventArgs e)
{
    DateTime clicktime = DateTime.Now;
    int nextsecont = DateTime.Now.Second + 1;
    int now = clicktime.Second;
    int timer = 10;

    do
    {    
        if (nextsecont == DateTime.Now.Second)
        {
            now++;
            timer--;
            nextsecont++;
            textbox3.Text = timer.ToString();

        }

    } while (nextsecont <= (clicktime.Second + 10));                
}

---

PS: I know there are better ways to do that (fe to use timer) but this is not the point. Sorry for my english..

Explanation: now i see the initial value for 10 seconds and then i see the 0. I don't see intermediate values..

Answer 1

If you want all of the data to display in the textbox, you'll need to append the data to what is already in there.

textbox3.Text += " " + timer.ToString();

That will take what is in there, add a space, and then the timer.