100 毫秒计时器，我希望每个计时器滴答返回 0 或 1

Question

i want to make a function.

every timer ticks it will flash green color and every second timer ticks it will close green color.

i have a timer in my win forms which is 100 ms interval.

so every 200 ms my color will flash as green..

can you help me about it

this doesnt work

var green = (((float)System.Environment.TickCount / 100) % 2) != 0;
if (green==true)
 {
greenColor);
if (green==false)
{                                 
noColor);
}

Answer 1

Because you have 2 states (color or no color) that swap each time I recommend to use a bool and just invert its value at the end of the timer-tick like so:

bool tick;
private void theTimer_Tick( object sender, EventArgs e )
{
    if(tick)
    {
        colorLabel.BackColor = Color.Red;//Using label as example
    }
    else
    {
        colorLabel.BackColor = Color.Green;
    }
    tick = !tick;//Invert tick bool
}

This way you don't need the time of the counter and don't have to calculate all sorts of things.

Answer 2

You were almost there. Just don't use (float) . Use integer arithmetic.

bool green = (System.Environment.TickCount / 100) % 2 == 0;

If you use floating point remainder (which I don't recommend), then your test should not be == 0 it should be < 1 . Otherwise it'll only be green for 1 ms when the division remainder is precisely zero.

bool green = (((float)System.Environment.TickCount / 100) % 2) < 1;