Advanced JavaScript with Internet Explorer: Working with Drives and More - How to know the number of partitions of each physical drive using JavaScript
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Now, let us try to develop a simple script (JavaScript) which shows the technique for retrieving the number of partitions of each drive on a web page. The entire code for the sample is as follows:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title></title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET
7.1">
<meta name="vs_targetSchema"
content="http://schemas.microsoft.com/intellisense/ie5">
<script id=clientEventHandlersJS language=javascript>
<!--
function Button1_onclick() {
var locator = new ActiveXObject ("WbemScripting.SWbemLocator");
var service = locator.ConnectServer(".");
var properties = service.ExecQuery("SELECT * FROM Win32_DiskDrive");
var e = new Enumerator (properties);
document.write("<table border=1>");
for (;!e.atEnd();e.moveNext ())
{
var p = e.item ();
document.write("<tr>");
document.write("<td>" + p.Caption + "</td>");
document.write("<td>" + p.DeviceID + "</td>");
document.write("<td>" + p.Partitions + "</td>");
document.write("<td>" + p.Size + "</td>");
document.write("</tr>");
}
document.write("</table>");
}
//-->
</script>
</head>
<body>
<INPUT id="Button1" type="button" value="Button"
name="Button1" language=javascript onclick="return Button1_onclick()">
</body>
</html>
The above would automatically list all the physical drives along with their names, ids and number of partitions. To retrieve physical drive information, I used a built-in class, “Win32_DiskDrive.” The class internally has a lot of properties, methods and events. But, in the above example we concentrated only on the properties “Caption,” “DeviceID,” “Partitions” and “Size” (related to the “Win32_DiskDrive” class).
The “for” loop I used in the above code iterates for every physical drive present in the system and finally retrieves only the properties of that drive.
Next: How to learn more information about each partition using JavaScript >>
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