I want generate a auto number in asp.net which must start as Cust. For example Cust/00001

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Try the following sample:

string finalstr = "Cust/00000";
        for (int i = 0; i < 10; i++) 
            string val = finalstr.Substring(5, finalstr.Length - 5);

            int newnumber = Convert.ToInt32(val) + 1;

            finalstr = "Cust/" + newnumber.ToString("00000");

thanks it work for me. but now I want read database and get highest number and then +1 for next number.

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