AdoNetAppender Class

Apache log4net™ SDK Documentation

Appender that logs to a database.

Inheritance Hierarchy

SystemObject
  log4net.AppenderAppenderSkeleton
    log4net.AppenderBufferingAppenderSkeleton
      log4net.AppenderAdoNetAppender

Namespace: log4net.Appender
Assembly: log4net (in log4net.dll) Version: 2.0.8.0-.NET 4.0

Syntax

C++

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public class AdoNetAppender : BufferingAppenderSkeleton

Public Class AdoNetAppender
	Inherits BufferingAppenderSkeleton

public ref class AdoNetAppender : public BufferingAppenderSkeleton

type AdoNetAppender =  
    class
        inherit BufferingAppenderSkeleton
    end

The AdoNetAppender type exposes the following members.

Constructors

	Name	Description
	AdoNetAppender	Initializes a new instance of the AdoNetAppender class.

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Properties

	Name	Description
	AppSettingsKey	The appSettings key from App.Config that contains the connection string.
	BufferSize	Gets or sets the size of the cyclic buffer used to hold the logging events. (Inherited from BufferingAppenderSkeleton.)
	CommandText	Gets or sets the command text that is used to insert logging events into the database.
	CommandType	Gets or sets the command type to execute.
	Connection	Gets or sets the underlying IDbConnection.
	ConnectionString	Gets or sets the database connection string that is used to connect to the database.
	ConnectionStringName	The connectionStrings key from App.Config that contains the connection string.
	ConnectionType	Gets or sets the type name of the IDbConnection connection that should be created.
	ErrorHandler	Gets or sets the IErrorHandler for this appender. (Inherited from AppenderSkeleton.)
	Evaluator	Gets or sets the ITriggeringEventEvaluator that causes the buffer to be sent immediately. (Inherited from BufferingAppenderSkeleton.)
	FilterHead	The filter chain. (Inherited from AppenderSkeleton.)
	Fix	Gets or sets a the fields that will be fixed in the event (Inherited from BufferingAppenderSkeleton.)
	Layout	Gets or sets the ILayout for this appender. (Inherited from AppenderSkeleton.)
	Lossy	Gets or sets a value that indicates whether the appender is lossy. (Inherited from BufferingAppenderSkeleton.)
	LossyEvaluator	Gets or sets the value of the ITriggeringEventEvaluator to use. (Inherited from BufferingAppenderSkeleton.)
	Name	Gets or sets the name of this appender. (Inherited from AppenderSkeleton.)
	OnlyFixPartialEventData	Obsolete. Gets or sets a value indicating if only part of the logging event data should be fixed. (Inherited from BufferingAppenderSkeleton.)
	ReconnectOnError	Should this appender try to reconnect to the database on error.
	RequiresLayout	Tests if this appender requires a Layout to be set. (Inherited from AppenderSkeleton.)
	SecurityContext	Gets or sets the SecurityContext used to call the NetSend method.
	Threshold	Gets or sets the threshold Level of this appender. (Inherited from AppenderSkeleton.)
	UseTransactions	Should transactions be used to insert logging events in the database.

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Methods

	Name	Description
	ActivateOptions	Initialize the appender based on the options set (Overrides BufferingAppenderSkeletonActivateOptions.)
	AddFilter	Adds a filter to the end of the filter chain. (Inherited from AppenderSkeleton.)
	AddParameter	Adds a parameter to the command.
	Append(LoggingEvent)	Append a bulk array of logging events. (Inherited from AppenderSkeleton.)
	Append(LoggingEvent)	This method is called by the DoAppend(LoggingEvent) method. (Inherited from BufferingAppenderSkeleton.)
	ClearFilters	Clears the filter list for this appender. (Inherited from AppenderSkeleton.)
	Close	Closes the appender and release resources. (Inherited from AppenderSkeleton.)
	CreateConnection	Creates an IDbConnection instance used to connect to the database.
	DoAppend(LoggingEvent)	Performs threshold checks and invokes filters before delegating actual logging to the subclasses specific [M:Append(LoggingEvent)] method. (Inherited from AppenderSkeleton.)
	DoAppend(LoggingEvent)	Performs threshold checks and invokes filters before delegating actual logging to the subclasses specific [M:Append(LoggingEvent[])] method. (Inherited from AppenderSkeleton.)
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	FilterEvent	Test if the logging event should we output by this appender (Inherited from AppenderSkeleton.)
	Finalize	Finalizes this appender by calling the implementation's Close method. (Inherited from AppenderSkeleton.)
	Flush	Flush the currently buffered events (Inherited from BufferingAppenderSkeleton.)
	Flush(Boolean)	Flush the currently buffered events (Inherited from BufferingAppenderSkeleton.)
	Flush(Int32)	Flushes any buffered log data. (Inherited from BufferingAppenderSkeleton.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetLogStatement	Formats the log message into database statement text.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsAsSevereAsThreshold	Checks if the message level is below this appender's threshold. (Inherited from AppenderSkeleton.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OnClose	Override the parent method to close the database (Overrides BufferingAppenderSkeletonOnClose.)
	PreAppendCheck	Called before [M:Append(LoggingEvent)] as a precondition. (Inherited from AppenderSkeleton.)
	RenderLoggingEvent(LoggingEvent)	Renders the LoggingEvent to a string. (Inherited from AppenderSkeleton.)
	RenderLoggingEvent(TextWriter, LoggingEvent)	Renders the LoggingEvent to a string. (Inherited from AppenderSkeleton.)
	ResolveConnectionString	Resolves the connection string from the ConnectionString, ConnectionStringName, or AppSettingsKey property.
	ResolveConnectionType	Retrieves the class type of the ADO.NET provider.
	SendBuffer(LoggingEvent)	Inserts the events into the database. (Overrides BufferingAppenderSkeletonSendBuffer(LoggingEvent).)
	SendBuffer(IDbTransaction, LoggingEvent)	Writes the events to the database using the transaction specified.
	SendFromBuffer	Sends the contents of the buffer. (Inherited from BufferingAppenderSkeleton.)
	ToString	Returns a String that represents the current Object. (Inherited from Object.)

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Fields

	Name	Description
	m_parameters	The list of AdoNetAppenderParameter objects.

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Remarks

AdoNetAppender appends logging events to a table within a database. The appender can be configured to specify the connection string by setting the ConnectionString property. The connection type (provider) can be specified by setting the ConnectionType property. For more information on database connection strings for your specific database see http://www.connectionstrings.com/.

Records are written into the database either using a prepared statement or a stored procedure. The CommandType property is set to Text (System.Data.CommandType.Text) to specify a prepared statement or to StoredProcedure (System.Data.CommandType.StoredProcedure) to specify a stored procedure.

The prepared statement text or the name of the stored procedure must be set in the CommandText property.

The prepared statement or stored procedure can take a number of parameters. Parameters are added using the AddParameter(AdoNetAppenderParameter) method. This adds a single AdoNetAppenderParameter to the ordered list of parameters. The AdoNetAppenderParameter type may be subclassed if required to provide database specific functionality. The AdoNetAppenderParameter specifies the parameter name, database type, size, and how the value should be generated using a ILayout.

Examples

An example of a SQL Server table that could be logged to:

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CREATE TABLE [dbo].[Log] ( 
  [ID] [int] IDENTITY (1, 1) NOT NULL ,
  [Date] [datetime] NOT NULL ,
  [Thread] [varchar] (255) NOT NULL ,
  [Level] [varchar] (20) NOT NULL ,
  [Logger] [varchar] (255) NOT NULL ,
  [Message] [varchar] (4000) NOT NULL 
) ON [PRIMARY]

Examples

An example configuration to log to the above table:

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<appender name="AdoNetAppender_SqlServer" 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=SQLSVR;initial catalog=test_log4net;integrated security=false;persist security info=True;User ID=sa;Password=sa" /><commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message]) VALUES (@log_date, @thread, @log_level, @logger, @message)" /><parameter><parameterName value="@log_date" /><dbType value="DateTime" /><layout type="log4net.Layout.PatternLayout" value="%date{yyyy'-'MM'-'dd HH':'mm':'ss'.'fff}" /></parameter><parameter><parameterName value="@thread" /><dbType value="String" /><size value="255" /><layout type="log4net.Layout.PatternLayout" value="%thread" /></parameter><parameter><parameterName value="@log_level" /><dbType value="String" /><size value="50" /><layout type="log4net.Layout.PatternLayout" value="%level" /></parameter><parameter><parameterName value="@logger" /><dbType value="String" /><size value="255" /><layout type="log4net.Layout.PatternLayout" value="%logger" /></parameter><parameter><parameterName value="@message" /><dbType value="String" /><size value="4000" /><layout type="log4net.Layout.PatternLayout" value="%message" /></parameter></appender>

Reference

log4net.Appender Namespace