How do I generate akphanumeric ids that starts with exactly this TKHCI then numerics 001

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I have been trying to generate ID's for a project I am doing. The user wants the ID's to starts with 'TKHC' than numerics like 001. Each time the form loads the auto-generated ID like TKHC001 should be loaded to the userID textbox.

What I have tried:

so far I have only been able to create a numeric ID

C#

private void TKHCI_UserID_Load()
        {
            var userID = DBS.TKHCI_Users.ToArray();
            ID = userID.LastOrDefault().TKHCI_id + 1;
            txtTKHCI_UserID.Text = Convert.ToString(ID);
        }

I need help to implement the requirement.

Posted 19-Jun-21 5:22am

Member 14133069

Updated 19-Jun-21 6:58am

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Comments

PIEBALDconsult 19-Jun-21 11:47am

Don't use alphanumeric values as IDs -- they're very inefficient.
If you are using SQL Server, please look into using a Sequence to reliably generate unique values -- particularly in a multi-user scenario.

Also, avoid using the Convert class, it does nothing that can't be done better another way (except for the ChangeType method).
All Convert.ToString(ID) will do is add complexity atop ID.ToString() and you gain nothing.

Member 14133069 19-Jun-21 11:56am

Thank you for the comment however that is the user requirement. The user wants the ID's to start with TKHC then 001 ++

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C^hris L^osinger · Accepted Answer · 2021-06-19T06:58:00

Solution 1

txtTKHCI_UserID.Text = "TKHC" + Convert.ToString(ID);

?

Posted 19-Jun-21 6:58am

C^hris L^osinger154.1K