Advertisement

06.20.2008 at 07:22AM PDT, ID: 23502282
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!
8.4

How to get drive letter/volume label from all connected drives

Asked by etiennedemers in Pascal Programming Language, Delphi Programming

Tags:

Gents,

I already use the following function to get the volume label using a specific drive letter. I need to be able to scan each connected drive and call this function for each drive. (Unless there is a better way)

Project description:

I am building a video player that works with a database. When I want to play a file, I look in the database to know on which drive the video is stored.

Each drive has got a specific volume label such as BB1, BB2, BB3, ect.

I have built a 4 bay hot swappable HDD USB reader.

Lets say I want to play a file which is stored on BB7.

I need to look through the present HDDs in my reader to see if BB7 is in. If so, play the file, else prompt the user to insert BB7.

In my database, the file name is stored in a string "\Video\myfile.mp2" so I only need to add the right drive letter to the begining of the string in order to pass to my player.

I am not too keen in scanning drive letters from D to Z to look for the label. I would like a cleaner solution, scan through connected drives...

Many thanks.

Start Free Trial 
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:

function GetVolumeLabel(DriveChar: Char): string;
var
  NotUsed:     DWORD;
  VolumeFlags: DWORD;
  VolumeInfo:  array[0..MAX_PATH] of Char;
  VolumeSerialNumber: DWORD;
  Buf: array [0..MAX_PATH] of Char;
begin
    GetVolumeInformation(PChar(DriveChar + ':\'),
    Buf, SizeOf(VolumeInfo), @VolumeSerialNumber, NotUsed,
    VolumeFlags, nil, 0);
 
    SetString(Result, Buf, StrLen(Buf));   { Set return result }
    Result:=AnsiUpperCase(Result)
end;
[+][-]06.20.2008 at 08:15AM PDT, ID: 21832013

View this solution now by starting your 7-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

 

About this solution

Zones: Pascal Programming Language, Delphi Programming
Tags: Delphi 2006
Sign Up Now!
Solution Provided By: ThievingSix
Participating Experts: 1
Solution Grade: B
 
 
 
Loading Advertisement...
20080716-EE-VQP-32 / EE_QW_2_20070628