在 Log4Net 增加 Guid 欄位的紀錄

Log4Net 是一套專業的 Logger, 之前比較常處理的是記錄一般資料型態的紀錄，如 String, Datetime等資料。這篇將針對如何處理 Guid (在 SQL Server 為 uniqueidentifier 的資料型態)來做討論.

開發環境 VS 2012, Log4Net 透過 Nuget 安裝的 2.0.3 版本, 資料庫是 SQL Server 2008 R2

在 Web.Confg 中 ADoNetAppender 的設定, 其中 ORG_ID 在 DB 中是 uniqueidentifier

 <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
      <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
      <connectionString value="data source=localhost;initial catalog=LOCAL_DB;integrated security=false;persist security info=True;User ID=user;Password=password"/>
      <commandText value="INSERT INTO SYS_EVENT_LOG ([DATE],[THREAD],[LEVEL],[LOGGER], [LINE], [MESSAGE],[EXCEPTION], [USER_NAME], [CREATE_USER], [IP], [MACHINE_NAME], [ACCESS_MODE], [ORG_ID]) VALUES (@log_date, @thread, @log_level, @logger, @line, @message, @exception, @user_name, @create_user, @ip, @machine_name, @access_mode, @org)"/>
      <bufferSize value="1"/>
      <parameter>
        <parameterName value="@log_date"/>
        <dbType value="DateTime"/>
        <layout type="log4net.Layout.RawTimeStampLayout"/>
      </parameter>
      <parameter>
        <parameterName value="@thread"/>
        <dbType value="String"/>
        <size value="255"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%thread"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@log_level"/>
        <dbType value="String"/>
        <size value="50"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%level"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@logger"/>
        <dbType value="String"/>
        <size value="255"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%logger"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@line"/>
        <dbType value="String"/>
        <size value="10"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%line"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@message"/>
        <dbType value="String"/>
        <size value="4000"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%message"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@exception"/>
        <dbType value="String"/>
        <size value="2000"/>
        <layout type="log4net.Layout.ExceptionLayout"/>
      </parameter>
      <parameter>
        <parameterName value="@user_name"/>
        <dbType value="String"/>
        <size value="50"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%property{user_name}"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@create_user"/>
        <dbType value="String"/>
        <size value="50"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%property{create_user}"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@ip"/>
        <dbType value="String"/>
        <size value="30"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%property{ip}"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@machine_name"/>
        <dbType value="String"/>
        <size value="100"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%property{machine_name}"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@access_mode"/>
        <dbType value="String"/>
        <size value="1"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%property{access_mode}"/>
        </layout>
      </parameter>

      <parameter>
        <parameterName value="@org" />
        <dbType value="Guid" />
        <layout type="log4net.Layout.RawPropertyLayout">
          <conversionPattern value="%property{org}" />
          <key value="org" />
        </layout>
      </parameter>
    </appender>
  </log4net>



在 C# 
            User.BU = Guid.NewID(); // get a new GUID

            log4net.GlobalContext.Properties["ip"] = user.LoginIP;
            log4net.GlobalContext.Properties["machine_name"] = user.LoginIP;
            log4net.GlobalContext.Properties["access_mode"] = "W";
            log4net.GlobalContext.Properties["create_user"] = user.UserAccount;
            log4net.GlobalContext.Properties["user_name"] = user.UserName;

            log4net.GlobalContext.Properties["org"] = user.BU;           

靈光一現

(right) off the top of one's head

Fig. without giving it too much thought or without precise knowledge. Mary: How much do you think this car would be worth on a trade? Fred: Well, right off the top of my head, I'd say about a thousand. Tom: What time does the morning train come in? Bill: Off the top of my head, I don't know.
See also: head, top

美國隊長2的一句對話
It's a great idea off the top of my head