以下代码介绍如何在代码中配置 AdoNetAppender。如果要添加过滤器，则需要在 GetAppender() 方法中的 appender 实例上添加过滤器实例。为了在您的应用程序中使用记录器，建议使用依赖注入来隔离记录器的实现和接口。此外，使用 DI 范围概念使其成为单例以避免对象重新创建。
注意：CrmConfigHelper 类用于访问应用程序配置文件 appSettings 部分。
代码示例如下所示
public sealed class SqlLogger:ILogger
{
private ILog _logger;
public SqlLogger()
{
log4net.Config.BasicConfigurator.Configure(GetAppender());
this._logger = log4net.LogManager.GetLogger(CrmConfigHelper.GetString(Constants.LOG4NET_LOGGER_NAME));
}
private log4net.Appender.AdoNetAppender GetAppender()
{
log4net.Appender.AdoNetAppender appender = new log4net.Appender.AdoNetAppender();
appender.ConnectionType = CrmConfigHelper.GetString(Constants.LOG4NET_CONNECTION_TYPE);
appender.ConnectionString = CrmConfigHelper.GetString(Constants.LOG4NET_DB_CONNECTION);
appender.BufferSize = CrmConfigHelper.getInteger(Constants.LOG4NET_BUFFER_SIZE);
appender.CommandText = "INSERT INTO [EventLog] ([Date],[HostName],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @hostname, @log_level, @logger, @message,@exception)";
appender.CommandType = System.Data.CommandType.Text;
appender.AddParameter(new log4net.Appender.AdoNetAppenderParameter() {
ParameterName = "@log_date",
DbType = System.Data.DbType.DateTime,
Size = 100,
Layout = new RawLayoutConverter().ConvertFrom(new PatternLayout("%date{yyyy'-'MM'-'dd HH':'mm':'ss'.'fff}")) as IRawLayout
});
appender.AddParameter(new log4net.Appender.AdoNetAppenderParameter()
{
ParameterName = "@hostname",
DbType = System.Data.DbType.String,
Size = 50,
Layout = new RawLayoutConverter().ConvertFrom(new PatternLayout("%property{log4net:HostName}")) as IRawLayout
});
appender.AddParameter(new log4net.Appender.AdoNetAppenderParameter()
{
ParameterName = "@log_level",
DbType = System.Data.DbType.String,
Size = 50,
Layout = new RawLayoutConverter().ConvertFrom(new PatternLayout("%level")) as IRawLayout
});
appender.AddParameter(new log4net.Appender.AdoNetAppenderParameter()
{
ParameterName = "@logger",
DbType = System.Data.DbType.String,
Size = 50,
Layout = new RawLayoutConverter().ConvertFrom(new PatternLayout("%logger")) as IRawLayout
});
appender.AddParameter(new log4net.Appender.AdoNetAppenderParameter()
{
ParameterName = "@message",
DbType = System.Data.DbType.String,
Size = 4000,
Layout = new RawLayoutConverter().ConvertFrom(new PatternLayout("%message")) as IRawLayout
});
appender.AddParameter(new log4net.Appender.AdoNetAppenderParameter()
{
ParameterName = "@exception",
DbType = System.Data.DbType.String,
Size = 2000,
Layout = new RawLayoutConverter().ConvertFrom(new ExceptionLayout()) as IRawLayout
});
appender.ActivateOptions();
return appender;
}
public void Error(Message context)
{
_logger.Error(context.ToJsonString());
}
public void Error(Message context, Exception exception)
{
_logger.Error(context.ToJsonString(), exception);
}
public void Warn(Message context)
{
_logger.Warn(context.ToJsonString());
}
public void Warn(Message context, Exception exception)
{
_logger.Warn(context.ToJsonString(), exception);
}
public void Info(Message context)
{
_logger.Info(context.ToJsonString());
}
public void Info(Message context, Exception exception)
{
_logger.Info(context.ToJsonString(), exception);
}
}
public interface ILogger
{
void Error(Message context);
void Error(Message context, Exception exception);
void Warn(Message context);
void Warn(Message context, Exception exception);
void Info(Message context);
void Info(Message context, Exception exception);
}
public sealed class Message
{
public string RunDate { get; set; }
public string RunBy { get; set; }
public string Message { get; set; }
public string ToJsonString()
{
return new JavaScriptSerializer().Serialize(this);
}
}