Determining the maximum number in the field.

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Hi all, I wanna ask a question. I need to determine the maximum number of a certain field so that i can use that maximum number to automatically generate an ID with certain format.
Here is to explain in general about what i should do.

Table A:
Complaint ID
1
2
3
4
5

(I need to add the maximum number to generate an ID in a certain format such as Complaint ID max number + 1)

Table B:
FileID = 'AA' + (ComplaintID Max + 1)

I would appreciate 4 any response..thank you in advance

Posted 21-Jul-13 16:27pm

Mare7

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jackspero18 · Answer 1 · 2013-07-21T18:30:00

This code is For auto generate ID

C#

public void generatecode()
        {
            int r;
            {
                sconn.Open();
                SqlCommand cmd = new SqlCommand("Select max(Voucher_No) from Front_Payment", sconn);
                SqlDataReader dr = cmd.ExecuteReader();
                if (dr.Read())
                {
                    string d = dr[0].ToString();
                    if (d == "")
                    {
                        txtvoucher.Text = "1";//set the value in textbox which name is id
                    }
                    else
                    {
                        r = Convert.ToInt32(dr[0].ToString());
                        r = r + 1;
                        txtvoucher.Text = r.ToString();
                    }
                }
                sconn.Close();
            }
        }