This is an example that I used when demonstrating ColdFusion 8 .NET integration on the recent usergroup tour, and as requested, I am posting it publicly. GetDriveInfo() returns a query containing specifics about the hard drives on your server, it returns all drives unless an optional drive letter is passed to it. GetDriveInfo() uses the .NET System.IO.DriveInfo class (which was introduced in .NET 2, and thus this example requires .NET 2 or 3).
Here is the code:
<!--- Get drive details for one or all drives --->
<cffunction name="GetDriveInfo" returntype="query" output="false">
<cfargument name="drive" required="no" default="">
<!--- Local vars --->
<cfset var result=QueryNew("name,type,isready,format,label,totalsize,freespace",
"varchar,varchar,bit,varchar,varchar,double,double")>
<cfset var sidiClass="">
<cfset var drives="">
<cfset var i=0>
<!--- Get System.IO.DriveInfo class --->
<cfobject type=".NET"
name="sidiClass"
class="System.IO.DriveInfo">
<!--- Get drives --->
<cfset drives=sidiClass.GetDrives()>
<!--- Loop through drives --->
<cfloop from="1" to="#ArrayLen(drives)#" index="i">
<!--- Check if need this one --->
<cfif ARGUMENTS.drive IS ""
OR ARGUMENTS.drive EQ drives[i].Get_Name()
OR (Len(ARGUMENTS.drive) IS 1
AND ARGUMENTS.drive EQ Left(drives[i].Get_Name(), 1))>
<!--- Add row --->
<cfset QueryAddRow(result)>
<!--- Get name, type, and ready flag --->
<cfset QuerySetCell(result, "name", drives[i].Get_Name())>
<cfset QuerySetCell(result, "type", drives[i].Get_DriveType().ToString())>
<cfset QuerySetCell(result, "isready", drives[i].Get_IsReady())>
<!--- Get extra details ONLY if ready, or will throw error --->
<cfif drives[i].Get_IsReady()>
<cfset QuerySetCell(result, "format", drives[i].Get_DriveFormat())>
<cfset QuerySetCell(result, "label", drives[i].Get_VolumeLabel())>
<cfset QuerySetCell(result, "totalsize", drives[i].Get_TotalSize())>
<cfset QuerySetCell(result, "freespace", drives[i].Get_AvailableFreeSpace())>
</cfif>
</cfif>
</cfloop>
<!--- Return result --->
<cfreturn result>
</cffunction>
And here is a simple test example:
<!--- Test with all drives --->
<h3>All Drives</h3>
<cfdump var="#GetDriveInfo()#">
<!--- Test with just C: drive --->
<h3>C: Drive</h3>
<cfdump var="#GetDriveInfo("C")#">
<!--- Display just space on C: drive --->
<h3>Free Space On C Drive</h3>
<cfdump var="#NumberFormat(GetDriveInfo("C").freespace)#">
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