update ZuserInfo set IntroducerNo =IntroducerNo + 1 where ZuserNo = '" + i + "'"

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protected void updintrosam(string i)
    {
        SqlConnection conn = new SqlConnection(a);
        SqlCommand comm = conn.CreateCommand();
        comm.CommandText = "update ZuserInfo set IntroducerNo =IntroducerNo + 1 where ZuserNo = '" + i + "'";
        conn.Open();
        comm.ExecuteNonQuery();
        conn.Close();
    }

update ZuserInfo set IntroducerNo =IntroducerNo + 1 where ZuserNo = '" + i + "'"
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update ZuserInfo set IntroducerNo =IntroducerNo + 1 where ZuserNo = '" + i + "'"
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