How to auto generate Unique Id whose starting 3 or 4 letters can be changed as per requirement.
I had tried below code but it auto generates the unique numbers + letters.
Random objRandom = new Random();
protected void GetRefnum()
{
List<int> ints = new List<int>();
for (int i = 0; i < 10; i++)
{
int randomNumber;
string strTemp;
randomNumber = objRandom.Next(1, 30);
strTemp = (string)Microsoft.VisualBasic.Interaction.Choose(randomNumber, "B", "1", "D", "2", "F", "3", "0", "4", "a", "5", "j", "6", "K", "7", "L", "8", "m", "9", "N", "p", "X", "Y", "#", "G", "H", "R", "w");
strRef += strTemp;
i++;
LRef.Text = strRef;
}
}
Which is not my requirement.
I want that I should change the staring 4 letters(as per my requirement) and then after 4 letters, code should generate unique numbers+letters
Please reply.