DbContextOptionsBuilder.LogTo Method

Definition

Namespace:

Microsoft.EntityFrameworkCore

Assembly:

Microsoft.EntityFrameworkCore.dll

Package:

Microsoft.EntityFrameworkCore v9.0.0

Overloads

LogTo(Action<String>, IEnumerable<String>, LogLevel, Nullable<DbContextLoggerOptions>)	Logs all events in the specified categories using the supplied action. For example, use optionsBuilder.LogTo(Console.WriteLine, new[] { DbLoggerCategory.Infrastructure.Name }) to log all events in the DbLoggerCategory.Infrastructure category.
LogTo(Action<String>, IEnumerable<EventId>, LogLevel, Nullable<DbContextLoggerOptions>)	Logs the specified events using the supplied action. For example, use optionsBuilder.LogTo(Console.WriteLine, new[] { CoreEventId.ContextInitialized }) to log the ContextInitialized event to the console.
LogTo(Action<String>, Func<EventId,LogLevel,Boolean>, Nullable<DbContextLoggerOptions>)	Logs events filtered by a supplied custom filter delegate. The filter should return true to log a message, or false to filter it out of the log.
LogTo(Action<String>, LogLevel, Nullable<DbContextLoggerOptions>)	Logs using the supplied action. For example, use optionsBuilder.LogTo(Console.WriteLine) to log to the console.
LogTo(Func<EventId,LogLevel,Boolean>, Action<EventData>)	Logs events to a custom logger delegate filtered by a custom filter delegate. The filter should return true to log a message, or false to filter it out of the log.

LogTo(Action<String>, IEnumerable<String>, LogLevel, Nullable<DbContextLoggerOptions>)

Source:

DbContextOptionsBuilder.cs

Logs all events in the specified categories using the supplied action. For example, use optionsBuilder.LogTo(Console.WriteLine, new[] { DbLoggerCategory.Infrastructure.Name }) to log all events in the DbLoggerCategory.Infrastructure category.

public virtual Microsoft.EntityFrameworkCore.DbContextOptionsBuilder LogTo (Action<string> action, System.Collections.Generic.IEnumerable<string> categories, Microsoft.Extensions.Logging.LogLevel minimumLevel = Microsoft.Extensions.Logging.LogLevel.Debug, Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions? options = default);

abstract member LogTo : Action<string> * seq<string> * Microsoft.Extensions.Logging.LogLevel * Nullable<Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder
override this.LogTo : Action<string> * seq<string> * Microsoft.Extensions.Logging.LogLevel * Nullable<Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder

Public Overridable Function LogTo (action As Action(Of String), categories As IEnumerable(Of String), Optional minimumLevel As LogLevel = Microsoft.Extensions.Logging.LogLevel.Debug, Optional options As Nullable(Of DbContextLoggerOptions) = Nothing) As DbContextOptionsBuilder

Parameters

action

Action<String>

Delegate called when there is a message to log.

categories

IEnumerable<String>

The DbLoggerCategory of each event to log.

minimumLevel

LogLevel

The minimum level of logging event to log. Defaults to Debug

options

Nullable<DbContextLoggerOptions>

Formatting options for log messages. Passing null (the default) means use DefaultWithLocalTime

Returns

DbContextOptionsBuilder

The same builder instance so that multiple calls can be chained.

Remarks

Use the LogTo(Action<String>, LogLevel, Nullable<DbContextLoggerOptions>) overload for default logging of all events. Use the LogTo(Action<String>, IEnumerable<EventId>, LogLevel, Nullable<DbContextLoggerOptions>) overload to log only specific events. Use the LogTo(Action<String>, Func<EventId,LogLevel,Boolean>, Nullable<DbContextLoggerOptions>) overload to use a custom filter for events. Use the LogTo(Func<EventId,LogLevel,Boolean>, Action<EventData>) overload to log to a fully custom logger.

See Using DbContextOptions and Logging for more information and examples.

LogTo(Action<String>, IEnumerable<EventId>, LogLevel, Nullable<DbContextLoggerOptions>)

Source:

DbContextOptionsBuilder.cs

Logs the specified events using the supplied action. For example, use optionsBuilder.LogTo(Console.WriteLine, new[] { CoreEventId.ContextInitialized }) to log the ContextInitialized event to the console.

public virtual Microsoft.EntityFrameworkCore.DbContextOptionsBuilder LogTo (Action<string> action, System.Collections.Generic.IEnumerable<Microsoft.Extensions.Logging.EventId> events, Microsoft.Extensions.Logging.LogLevel minimumLevel = Microsoft.Extensions.Logging.LogLevel.Debug, Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions? options = default);

abstract member LogTo : Action<string> * seq<Microsoft.Extensions.Logging.EventId> * Microsoft.Extensions.Logging.LogLevel * Nullable<Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder
override this.LogTo : Action<string> * seq<Microsoft.Extensions.Logging.EventId> * Microsoft.Extensions.Logging.LogLevel * Nullable<Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder

Public Overridable Function LogTo (action As Action(Of String), events As IEnumerable(Of EventId), Optional minimumLevel As LogLevel = Microsoft.Extensions.Logging.LogLevel.Debug, Optional options As Nullable(Of DbContextLoggerOptions) = Nothing) As DbContextOptionsBuilder

Parameters

action

Action<String>

Delegate called when there is a message to log.

events

IEnumerable<EventId>

The EventId of each event to log.

minimumLevel

LogLevel

The minimum level of logging event to log. Defaults to Debug

options

Nullable<DbContextLoggerOptions>

Formatting options for log messages. Passing null (the default) means use DefaultWithLocalTime

Returns

DbContextOptionsBuilder

The same builder instance so that multiple calls can be chained.

Remarks

Use the LogTo(Action<String>, LogLevel, Nullable<DbContextLoggerOptions>) overload for default logging of all events. Use the LogTo(Action<String>, IEnumerable<String>, LogLevel, Nullable<DbContextLoggerOptions>) overload to log only events in specific categories. Use the LogTo(Action<String>, Func<EventId,LogLevel,Boolean>, Nullable<DbContextLoggerOptions>) overload to use a custom filter for events. Use the LogTo(Func<EventId,LogLevel,Boolean>, Action<EventData>) overload to log to a fully custom logger.

See Using DbContextOptions and Logging for more information and examples.

LogTo(Action<String>, Func<EventId,LogLevel,Boolean>, Nullable<DbContextLoggerOptions>)

Source:

DbContextOptionsBuilder.cs

Logs events filtered by a supplied custom filter delegate. The filter should return true to log a message, or false to filter it out of the log.

public virtual Microsoft.EntityFrameworkCore.DbContextOptionsBuilder LogTo (Action<string> action, Func<Microsoft.Extensions.Logging.EventId,Microsoft.Extensions.Logging.LogLevel,bool> filter, Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions? options = default);

abstract member LogTo : Action<string> * Func<Microsoft.Extensions.Logging.EventId, Microsoft.Extensions.Logging.LogLevel, bool> * Nullable<Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder
override this.LogTo : Action<string> * Func<Microsoft.Extensions.Logging.EventId, Microsoft.Extensions.Logging.LogLevel, bool> * Nullable<Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder

Public Overridable Function LogTo (action As Action(Of String), filter As Func(Of EventId, LogLevel, Boolean), Optional options As Nullable(Of DbContextLoggerOptions) = Nothing) As DbContextOptionsBuilder

Parameters

action

Action<String>

Delegate called when there is a message to log.

filter

Func<EventId,LogLevel,Boolean>

Delegate that returns true to log the message or false to ignore it.

options

Nullable<DbContextLoggerOptions>

Formatting options for log messages. Passing null (the default) means use DefaultWithLocalTime

Returns

DbContextOptionsBuilder

The same builder instance so that multiple calls can be chained.

Remarks

Use the LogTo(Action<String>, LogLevel, Nullable<DbContextLoggerOptions>) overload for default logging of all events. Use the LogTo(Action<String>, IEnumerable<EventId>, LogLevel, Nullable<DbContextLoggerOptions>) Use the LogTo(Action<String>, IEnumerable<String>, LogLevel, Nullable<DbContextLoggerOptions>) overload to log only events in specific categories. Use the LogTo(Func<EventId,LogLevel,Boolean>, Action<EventData>) overload to log to a fully custom logger.

See Using DbContextOptions and Logging for more information and examples.

LogTo(Action<String>, LogLevel, Nullable<DbContextLoggerOptions>)

Source:

DbContextOptionsBuilder.cs

Logs using the supplied action. For example, use optionsBuilder.LogTo(Console.WriteLine) to log to the console.

public virtual Microsoft.EntityFrameworkCore.DbContextOptionsBuilder LogTo (Action<string> action, Microsoft.Extensions.Logging.LogLevel minimumLevel = Microsoft.Extensions.Logging.LogLevel.Debug, Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions? options = default);

abstract member LogTo : Action<string> * Microsoft.Extensions.Logging.LogLevel * Nullable<Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder
override this.LogTo : Action<string> * Microsoft.Extensions.Logging.LogLevel * Nullable<Microsoft.EntityFrameworkCore.Diagnostics.DbContextLoggerOptions> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder

Public Overridable Function LogTo (action As Action(Of String), Optional minimumLevel As LogLevel = Microsoft.Extensions.Logging.LogLevel.Debug, Optional options As Nullable(Of DbContextLoggerOptions) = Nothing) As DbContextOptionsBuilder

Parameters

action

Action<String>

Delegate called when there is a message to log.

minimumLevel

LogLevel

The minimum level of logging event to log. Defaults to Debug

options

Nullable<DbContextLoggerOptions>

Formatting options for log messages. Passing null (the default) means use DefaultWithLocalTime

Returns

DbContextOptionsBuilder

The same builder instance so that multiple calls can be chained.

Remarks

This overload allows the minimum level of logging and the log formatting to be controlled. Use the LogTo(Action<String>, IEnumerable<EventId>, LogLevel, Nullable<DbContextLoggerOptions>) overload to log only specific events. Use the LogTo(Action<String>, IEnumerable<String>, LogLevel, Nullable<DbContextLoggerOptions>) overload to log only events in specific categories. Use the LogTo(Action<String>, Func<EventId,LogLevel,Boolean>, Nullable<DbContextLoggerOptions>) overload to use a custom filter for events. Use the LogTo(Func<EventId,LogLevel,Boolean>, Action<EventData>) overload to log to a fully custom logger.

See Using DbContextOptions and Logging for more information and examples.

LogTo(Func<EventId,LogLevel,Boolean>, Action<EventData>)

Source:

DbContextOptionsBuilder.cs

Logs events to a custom logger delegate filtered by a custom filter delegate. The filter should return true to log a message, or false to filter it out of the log.

public virtual Microsoft.EntityFrameworkCore.DbContextOptionsBuilder LogTo (Func<Microsoft.Extensions.Logging.EventId,Microsoft.Extensions.Logging.LogLevel,bool> filter, Action<Microsoft.EntityFrameworkCore.Diagnostics.EventData> logger);

abstract member LogTo : Func<Microsoft.Extensions.Logging.EventId, Microsoft.Extensions.Logging.LogLevel, bool> * Action<Microsoft.EntityFrameworkCore.Diagnostics.EventData> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder
override this.LogTo : Func<Microsoft.Extensions.Logging.EventId, Microsoft.Extensions.Logging.LogLevel, bool> * Action<Microsoft.EntityFrameworkCore.Diagnostics.EventData> -> Microsoft.EntityFrameworkCore.DbContextOptionsBuilder

Public Overridable Function LogTo (filter As Func(Of EventId, LogLevel, Boolean), logger As Action(Of EventData)) As DbContextOptionsBuilder

Parameters

filter

Func<EventId,LogLevel,Boolean>

Delegate that returns true to log the message or false to ignore it.

logger

Action<EventData>

Delegate called when there is a message to log.

Returns

DbContextOptionsBuilder

The same builder instance so that multiple calls can be chained.

Remarks

Use the LogTo(Action<String>, LogLevel, Nullable<DbContextLoggerOptions>) overload for default logging of all events. Use the LogTo(Action<String>, IEnumerable<EventId>, LogLevel, Nullable<DbContextLoggerOptions>) Use the LogTo(Action<String>, IEnumerable<String>, LogLevel, Nullable<DbContextLoggerOptions>) overload to log only events in specific categories. Use the LogTo(Action<String>, Func<EventId,LogLevel,Boolean>, Nullable<DbContextLoggerOptions>) overload to use a custom filter for events.

See Using DbContextOptions and Logging for more information and examples.