如何仅读取字符串的一部分以获得驱动器的序列号？

Question

I have a string with hard drive volume information (the message is displayed in a message box)

Volume In Drive E is NEW VOLUME
Volume Serial Number is 9AE4-F468

I want to read only "9AE4F468" without the dash, and display it in a message box.

I tried using Substring(45,54) , but I keep getting a compilation error because the program is not reading it.

How can I retrieve that particular substring without the dash?

Answer 1

Rather than being in the position where you have to use a substring to get at the disk volume serial number, you could use a method that gives you the correct string directly.

To use the following code, you must add to your assembly a reference to System.Management and then add a using System.Management to the top of the code file.

Then add this method:

public string DiskVolumeSerialNumber(char driveLetter)
{
    ManagementObject disk = new ManagementObject("win32_logicaldisk.deviceid=\"" + driveLetter +":\"");
    disk.Get();
    return disk["VolumeSerialNumber"].ToString();
}

Which you can call like this:

string serial = DiskVolumeSerialNumber('C');
Console.WriteLine(serial);

Answer 2

Assuming you want the last word only:

string lastWordNoDash = 
    myLongMessage.Substring(myLongMessage.LastIndexOf(" ") + 1).Replace("-", "");

Answer 3

if you are looking for the last word then shadow wizard solve the problem.

if you're having more then you can do

string lineNeeded = "Volume Serial Number is ";
string lastWordNoDash = 
    myLongMessage.Substring(myLongMessage.IndexOf(lineNeeded) + lineNeeded.length, 9).Replace("-", "");