仅当 log4net c# 中的级别为 WARN 时，如何才能写入数据库日志

Question

I want to write to a log file and a database using log4net. However I only want to write to the database if the level is WARN.

I have tried Threshold, level and filter in my config file.

<log4net>
  <root>
    <appender-ref ref="ADONetAppender" />
    <appender-ref ref="file" />
  </root>

  <appender name="ADONetAppender" type="log4net.Appender.ADONetAppender">
    <filter type="log4net.Filter.LevelMatchFilter">
      <levelToMatch value="WARN"/>
    </filter>
    <bufferSize value="100"/>
    <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
    <connectionString value="connString"/>
    <commandText value="APP_Insert_File_Failure" />
    <commandType value="StoredProcedure" />

    <parameter>
      <parameterName value="@FileName" />
      <dbType value="String" />
      <size value="255"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%property{FileName}" />
      </layout>
    </parameter>

    <parameter>
      <parameterName value="@FileFailure" />
      <dbType value="String" />
      <size value="255"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%property{FileFailure}" />
      </layout>
    </parameter>
  </appender>

  <appender name="file" type="log4net.Appender.RollingFileAppender">
    <param name="File" value="C:\Temp" />
    <appendToFile value="true" />
    <rollingStyle value="Date" />
    <datePattern value="yyyyMMdd" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date %-5level %newline%message%newline%exception%newline" />
    </layout>
  </appender>
</log4net>

My C# code to run is

            //Parameters for stored procedure
            log4net.GlobalContext.Properties["FileName"] = Path.GetFileName(filename);
            log4net.GlobalContext.Properties["FileFailure"] = "Testing 1 2 3;
            log.Warn("Testing 1 2 3");

I use to populate the connString -

    public static void SetUpDbConnection(string adoNetAppenderString, string newConnString)
    {
        log4net.Repository.ILoggerRepository repository = log4net.LogManager.GetRepository();
        foreach (log4net.Appender.IAppender appender in repository.GetAppenders())
        {
            if (appender.Name.CompareTo(adoNetAppenderString) == 0 && appender is log4net.Appender.AdoNetAppender)
            {
                log4net.Appender.AdoNetAppender adoAppender = (log4net.Appender.AdoNetAppender)appender;
                adoAppender.ConnectionString = System.IO.Path.Combine(adoAppender.ConnectionString, newConnString);
                adoAppender.ActivateOptions();
            }
        }
    }

It writes to the text file no problem, but nothing is appearing in the database.

I want it to write into the database when level = Warn

Answer 1

The problem was the connection string. I tried to change it dynamically, but that wan't working. I copied the the connection string straight into the config file and it worked.

Now I just have to figure out to be able to change the connection string dynamically.

Thanks anyway!

Answer 2

Found out what I was doing wrong when trying to change the connection string dynamically.

I changed -

 adoAppender.ConnectionString = System.IO.Path.Combine(adoAppender.ConnectionString, newConnString);

to -

 adoAppender.ConnectionString = newConnString;

In the SetUpDbConnection method.