异常“SqlConnection 的列名'False'无效

我收到异常 语句中的列名"False"无效

reader = cmd.ExecuteReader(CommandBehavior.SingleRow);

我知道这可能与SQL的布尔类型是"位"有关，并且它不会将false转换为0。您如何缓解这种情况，或者这是这里的问题？

    public override bool ValidateUser(string username, string password)
    {
        bool isValid = false;
        SqlConnection conn = new SqlConnection(connectionString);
        SqlCommand cmd = new SqlCommand("SELECT Password, IsApproved FROM Users" +
                " WHERE Email = @Email AND ApplicationName = @ApplicationName AND IsLockedOut = False", conn);
        cmd.Parameters.Add("@Email", SqlDbType.NVarChar, 128).Value = username;
        cmd.Parameters.Add("@ApplicationName", SqlDbType.NVarChar, 255).Value = m_ApplicationName;
        SqlDataReader reader = null;
        bool isApproved = true;
        string pwd = "";
        try
        {
            conn.Open();
            reader = cmd.ExecuteReader(CommandBehavior.SingleRow);
            if (reader.HasRows)
            {
                reader.Read();
                pwd = reader.GetString(0);
                isApproved = reader.GetBoolean(1);
            }
            else
            {
                return false;
            }
            reader.Close();
            if (CheckPassword(password, pwd))
            {
                if (isApproved)
                {
                    isValid = true;
                    SqlCommand updateCmd = new SqlCommand("UPDATE Users SET LastLoginDate = @LastLoginDate" +
                                                            " WHERE Email = @Email AND ApplicationName = @ApplicationName", conn);
                    updateCmd.Parameters.Add("@LastLoginDate", SqlDbType.DateTime).Value = DateTime.Now;
                    updateCmd.Parameters.Add("@Email", SqlDbType.NVarChar, 255).Value = username;
                    updateCmd.Parameters.Add("@ApplicationName", SqlDbType.NVarChar, 255).Value = m_ApplicationName;
                    updateCmd.ExecuteNonQuery();
                }
            }
            else
            {
                conn.Close();
                UpdateFailureCount(username, "password");
            }
        }