cmd.ExecuteNonQuery()有问题

下面是我的代码,如果我做错了请告诉我。。我用的是一些静态的方法,有什么问题吗?。。

public Boolean AddDivCo(Int32 UserNo,String ID, String Role, String DivName )
{
    Boolean ret = false;


    OracleCommand cmd = new OracleCommand();
    OracleConnection conn = new OracleConnection();
    int i = 0;

    try
    {
        conn.ConnectionString = ConfigurationManager.ConnectionStrings["Conn_RIS"].ConnectionString;
        conn.Open();

        cmd.Connection = conn;
        String mySQL = "INSERT INTO R4CAD_ADMIN (AdminUserNo, AdminID, AdminRole, AdminDivName)VALUES(:AdminUserNo,:AdminID,:AdminRole,:DivName)";

        OracleParameter p1 = new OracleParameter("AdminUserNo", OracleType.Number);
        p1.Value = UserNo;
        cmd.Parameters.Add(p1);

        OracleParameter p2 = new OracleParameter("AdminID", OracleType.VarChar);
        p2.Value = ID;
        cmd.Parameters.Add(p2);

        OracleParameter p3 = new OracleParameter("AdminRole", OracleType.VarChar);
        p3.Value = Role;
        cmd.Parameters.Add(p3);

        OracleParameter p4 = new OracleParameter("DivName", OracleType.VarChar);
        p4.Value = DivName;
        cmd.Parameters.Add(p4);

        cmd.CommandText = mySQL;

        i = cmd.ExecuteNonQuery();

        if (i != 0)
        {
            ret = true;
        }
        else
        {
            ret = false;
        }
    }
    catch (Exception err)
    {
        Console.WriteLine(err.Message.ToString());
    }
    finally
    {
        cmd.Dispose();
        //cmd = null;
        //conn = null;
        conn.Close();
    }
    return ret;
}