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Record changes in the variables

Thomas Janecek

greet all the advice needed to do in C # record changes in a variable of type bool? variable value is read every 5 seconds and I need only record the change. from False to True andback. I thank Thomas

1 Reply

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Vulpes14y ago
Accepted answer
Your question is not very clear but, if it's a windows forms application, I'd try something like this where the timer interval is set to 5000 milliseconds:

bool? myBool = false;
bool? lastValue = false;
bool hasChanged = false;

private void timer1_Tick(object sender, EventArgs e)
{
if (myBool != lastValue)
{
lastValue = myBool;
hasChanged = true;
// possibly do something here
}
else
{
hasChanged = false;
}
}

Notice that a variable of type bool? can assume the values true, false or null.