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POC# DriveInfo.GetDrives () slow on select computer
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  1. POC# DriveInfo.GetDrives () slow on select computer
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    copied!<p>I use the DriveInfo.GetDrives() method in my code to populate a combobox with all available and ready removable drives on my specified computer. It works great on three test computers, but on a single computer when the user clicks the button that opens the window with the combo box in it (and the GetDrives in the constructor) it takes a good few seconds before the window opens up.</p> <p>The computer is running Windows 7 and the only things to note would be it has a RAID setup.</p> <p>Once open it is responsive it just hangs when opening for some reason. I couldn't find anything of help on the MSDN documentation and I found no similar cases online. Please let me know if you have had any experiences with similar issues or any suggestions.</p> <p>I extracted the window that used the DriveInfo from my project and built a test application. The code behind is below:</p> <pre><code>public partial class MainWindow : Window { //Instance variables used in class and refrenced in 'get' methods int count; string[] driveNames; public MainWindow() //Constructor { InitializeComponent(); getInfo(); //Populate instance vars } public string[] getRemovableDrives() //Returns array of drive letters for removable drives in computer { return driveNames; } public int getRemovableDrivesCount() //Returns number of removable drives in computer { return count; } private void getInfo() //Run once to get information about removable drives on computer and store into instance vars { count = 0; List&lt;string&gt; drivesTemp = new List&lt;string&gt;(); foreach (DriveInfo d in DriveInfo.GetDrives()) { if (d.IsReady == true &amp;&amp; d.DriveType == DriveType.Removable &amp;&amp; d.DriveFormat == "FAT32") { drives.Items.Add(d.VolumeLabel + " (" + d.Name + ")"); drivesTemp.Add(d.Name); count++; } } driveNames = new string[count]; for (int i = 0; i &lt; count; i++) { driveNames[i] = drivesTemp[i]; } } private void Window_Loaded(object sender, RoutedEventArgs e) //Selects first available drive in drop down box { drives.SelectedIndex = drives.Items.Count - 1; } private void format_Click(object sender, RoutedEventArgs e) //Attempts to format drive { string drive = driveNames[drives.SelectedIndex]; try { Directory.CreateDirectory(drive + "LOOKOUT.SD"); Directory.CreateDirectory(drive + "LOOKOUT.SD\\CONFIG"); Directory.CreateDirectory(drive + "LOOKOUT.SD\\HISTORY"); Directory.CreateDirectory(drive + "LOOKOUT.SD\\TEST"); Directory.CreateDirectory(drive + "LOOKOUT.SD\\UPDATES"); Directory.CreateDirectory(drive + "LOOKOUT.SD\\VPROMPTS"); MessageBox.Show("Format complete, your removable device is now ready to use.", "Format Successful", MessageBoxButton.OK, MessageBoxImage.Information); } catch { MessageBox.Show("Your removable device has failed to format correctly.", "Format Failure", MessageBoxButton.OK, MessageBoxImage.Exclamation); } Close(); } private void cancel_Click(object sender, RoutedEventArgs e) //Closes window without formatting { Close(); } } </code></pre>
 

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