Generation ID Number and Letter in C # Code

Question

Two Type ID Generation

1.Center Name By
Textbox Name Enter New Delhi - ID Generation Ex: - ND001, ND002……
And
Next Time other Center Name (Dhanbad) Enter - Change ID Generation Ex: - DH001, DH002……

2.Center ID By
Dropdown List Center ID Select (ND001) –Next ID Generation Ex: - ND001A, ND001B, ND001B


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