1､NLog使用SQLite的配置文件

<?xml version="1.0" encoding="utf-8"?>
http://www.nlog-project.org/schemas/NLog.xsd"
      xsi:schemaLocation="NLog NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      throwExceptions="true"
      internalLogIncludeTimestamp="true"
      internalLogFile="nlog-internal.log"
      internalLogLevel="Error">
    <targets>
        <target xsi:type="Database"
            name="db"
            dbProvider="System.Data.SQLite.SQLiteConnection, System.Data.SQLite"
            connectionString="Data Source=database.db;">
            <commandText>
                insert into Logs (TimestampUtc, Application, Level, Message, Exception, Logger)
                values (@timestamputc, @application, @level, @message, @exception, @logger);
            </commandText>
            <parameter name="@timestamputc" layout="${date:universalTime=true:format=yyyy-MM-dd HH\:mm\:ss.fff}" />
            <parameter name="@application" layout="My App" />
            <parameter name="@level" layout="${level}" />
            <parameter name="@message" layout="${message}" />
            <parameter name="@exception" layout="${exception:format=tostring}" />
            <parameter name="@logger" layout="${logger}" />
        </target>
    </targets>
    <rules>
        <logger name="MyApp.*" minlevel="Info" writeTo="database" />
        <logger name="*" minlevel="Warn" writeTo="database" />
    </rules>
</nlog>

2､SQLite中建表语句

CREATE TABLE "Logs" ( 
    `Id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, 
    `TimestampUtc` TEXT NOT NULL, 
    `Application` TEXT NOT NULL, 
    `Level` TEXT NOT NULL, 
    `Message` TEXT NOT NULL, 
    `Logger` TEXT NOT NULL, 
    `Exception` TEXT )

3､安装引用System.Data.SQLite Nuget包

Package Manager

PM> Install-Package System.Data.SQLite -Version 1.0.112

或

.NET CLI

> dotnet add package System.Data.SQLite --version 1.0.112

界面管理器安装方法：VS(Visual Studio)中Nuget的使用

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