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POIn C#, how to create an array of data that's updating every 15 seconds
 

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  1. POIn C#, how to create an array of data that's updating every 15 seconds
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    <p>I'm a programming student that is assigned a project where I have to use a random number representing a user selected unit of measurement and returning the measurement, the converted measurement, and the time collected. </p> <p>I set up a dispatcher timer at an interval of 15 seconds for the timer. So how it works is the program triggers an event every 15 seconds that displays a random number in either a metric or English measurement, then displays the converted value and the time and of course, the timer starts with a start button and displays the data until a stop button is depressed. </p> <p>My question is that I would like to show a limited history of the collected data, but I am having trouble with the array. Each time it changes to a new data, it either writes over the previous data or doesn't add the new data, depending on how I formulate the statement. So when displaying to a label, it only shows one line of the current data, and not showing any other data.</p> <p>For example, the user selects "centimeters" the program determines that it is metric and uses a random number as its value concatenated with the converted value and time value. <br/>15 seconds later the event is triggered and a new random number is displayed for "centimeters". <br/>So after combining the three values (measurement, converted measurement and time) which I'll call dataCollected, I populate the array: </p> <pre><code> string [] dataHistory = new string[10] for (int i = 0; i &lt; dataHistory.Length; i++) { if (dataHistory[i] == null || dataHistory[i] == "") { dataHistory[i] = dataTlt + "\n"; } } foreach (string c in dataHistory) { collectedLbl.Content = c; } </code></pre> <p>Not sure what I'm doing wrong.</p>
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