Guy*_*der 3 f# nlog f#-interactive
使用F#Interactive时,我需要捕获F#函数的输入和输出.当程序在Visual Studio下使用F5或Ctrl-F5运行时,我能够让NLog正常工作.包含输出到日志的语句的相同方法也可以正常工作,并在通过F#Interactive调用时调用; 日志文件中没有任何内容.
我还尝试使用F#Interactive来设置对NLog的引用,当从F#Interactive运行时,在日志中仍然没有任何内容.
#I @"..\packages\NLog.2.0.0.2000\lib\net40"
#r @"NLog.dll"
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我甚至发现这导致我尝试了这些
NLog.Config.SimpleConfigurator.ConfigureForConsoleLogging()
NLog.Config.SimpleConfigurator.ConfigureForFileLogging(<full file name>)
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并且仍然没有在日志文件中.
有人知道Nlog是否可以与F#Interactive一起使用?
如果是这样,它是如何完成的?
编辑
当作为独立运行时,我能够让NLog与fsi.exe一起使用.所以现在问题似乎是让NLog找到配置文件,因为NLog无法从Visual Studio的fsi.exe位置找到配置文件.看看在NLog.dll目录中使用NLog.dll.nlog.
Guy*_*der 11
使用F#Interactive的NLog的问题是NLog认为该Temp
目录是查找的位置NLog.config
,从不成功.解决这个问题的方法是以编程方式定位NLog.config
NLog.
从Visual Studio中运行F#Interactive时,它会将当前工作目录设置为临时文件.
> System.Environment.CurrentDirectory;;
val it : string = "C:\Users\Eric\AppData\Local\Temp"
Run Code Online (Sandbox Code Playgroud)NLog日志记录需要三个组件:
a.引用NLog.dll.
湾 配置文件.
C.从代码调用记录器方法.
__SOURCE_DIRECTORY__
.请参阅F#规范 3.11标识符替换而不是直接进入F#Interactive解决方案,将使用以下进程,因为需要创建DLL来设置和保存用于F#Interactive的NLog的函数.
创建包含三个项目的解决方案并安装NLog.
解决方案名称:NLogExample
项目1 - 库,名称:日志 - 包含调用NLog
项目2的扩展函数- 库,名称:MyLibrary - 用于生成使用日志功能的演示DLL.
项目3 - 控制台应用程序,名称:主要 - 用于生成使用日志功能的演示EXE.
一个.手动创建NLog.config
b.从正在运行的项目中访问NLog.config
c.将消息记录到文件中
一个.以编程方式创建配置
b.为正在运行的项目创建配置并将消息记录到该文件
使用F#Interactive创建配置并将消息记录到文件中
使用Visual Studio创建三个项目.
为所有三个项目安装NLog.
注意:要使这些示例在__SOURCE_DIRECTORY__;;
从F#Interactive运行时起作用,它应报告属于项目的目录而不是Temp
目录.
注意:此答案中的所有路径都与解决方案目录相关.
当您<Solution directory>
在实际的解决方案目录中看到替代时.
路径: <Solution director>\NLog.config
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
throwExceptions="true">
<targets>
<target xsi:type="File"
name="file"
fileName="<Solution directory>\log.txt"
autoFlush="true"
/>
</targets>
<rules>
<logger name="*"
minlevel="Trace"
writeTo="file"
/>
</rules>
</nlog>
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注意:请记住更改<Solution directory>
为实际路径并进行设置 autoFlush="true"
注意:添加NLog.config
到解决方案可以更轻松地查看/修改文件.
在Log.Library1.fs中
namespace Log
module MyLog =
let configureNLog () =
let projectPath = __SOURCE_DIRECTORY__
let soulutionPath = projectPath + "\.."
let configPath = soulutionPath + @"\NLog.config"
let xmlConfig = new NLog.Config.XmlLoggingConfiguration(configPath)
NLog.LogManager.Configuration <- xmlConfig
let NLogConfigToString () =
let targets = NLog.LogManager.Configuration.AllTargets
let out = ""
let out = Seq.fold (fun out target -> out + (sprintf "%A\n" target)) out targets
let rules = NLog.LogManager.Configuration.LoggingRules
let out = Seq.fold (fun out rule -> out + (sprintf "%A\n" rule)) out rules
out
let printNLogConfig () =
Printf.printfn "%s" (NLogConfigToString ())
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并为Log项目添加引用 System.XML
在Main.Program.fs中
open Log
[<EntryPoint>]
let main argv =
MyLog.configureNLog ()
MyLog.printNLogConfig ()
0 // return an integer exit code
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并为Main项目添加对项目的引用Log
,并将Main项目设置为启动项目.
运行时,应该输出到控制台:
File Target[file]
logNamePattern: (:All) levels: [ Trace Debug Info Warn Error Fatal ] appendTo: [ file ]
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在Log.Library1.fs中
namespace Log
open NLog
module MyLog =
let configureNLog () =
let projectPath = __SOURCE_DIRECTORY__
let soulutionPath = projectPath + "\.."
let configPath = soulutionPath + @"\NLog.config"
let xmlConfig = new NLog.Config.XmlLoggingConfiguration(configPath)
NLog.LogManager.Configuration <- xmlConfig
let NLogConfigToString () =
let targets = NLog.LogManager.Configuration.AllTargets
let out = ""
let out = Seq.fold (fun out target -> out + (sprintf "%A\n" target)) out targets
let rules = NLog.LogManager.Configuration.LoggingRules
let out = Seq.fold (fun out rule -> out + (sprintf "%A\n" rule)) out rules
out
let printNLogConfig () =
Printf.printfn "%s" (NLogConfigToString ())
let evalTracer = LogManager.GetLogger("file")
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在Main.Program.fs中
open Log
open Library1
[<EntryPoint>]
let main argv =
MyLog.configureNLog ()
MyLog.printNLogConfig ()
// Add as many of these as needed
MyLog.evalTracer.Trace("In Main @1.")
MyFunctions.test001 ()
0 // return an integer exit code
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并为Main项目添加对MyLibrary
项目的引用.
在MyLibrary.Library1.fs中
namespace Library1
open Log
module MyFunctions =
let test001 () =
MyLog.evalTracer.Trace("In Library @1.")
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并为MyLibrary项目添加对Log
项目的引用.
运行时,日志文件log.txt
应包含类似于:
2016-03-28 11:03:52.4963|TRACE|file|In Main @1.
2016-03-28 11:03:52.5263|TRACE|file|In Library @1
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如果NLog.config
存在文件,请将其删除以验证代码是否已创建新配置但未创建文件.
要使用F#以编程方式设置配置,您需要知道:
要Log.Library1.fs添加
let configureNLogPrgramatically () =
let config = new NLog.Config.LoggingConfiguration()
let fileTarget = new NLog.Targets.FileTarget()
let projectPath = __SOURCE_DIRECTORY__
let soulutionPath = projectPath + "\.."
let filePath = soulutionPath + @"\log.txt"
let layout = new NLog.Layouts.SimpleLayout(filePath)
fileTarget.Name <- "file"
fileTarget.FileName <- layout
fileTarget.AutoFlush <- true
config.AddTarget("file", fileTarget)
let rule1 = new NLog.Config.LoggingRule("*",NLog.LogLevel.Trace,fileTarget)
config.LoggingRules.Add(rule1)
NLog.LogManager.Configuration <- config
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在Main.Program.fs中
open Log
open Library1
[<EntryPoint>]
let main argv =
MyLog.configureNLogPrgramatically ()
MyLog.printNLogConfig ()
// Add as many of these as needed
MyLog.evalTracer.Trace("In Main @1.")
MyFunctions.test001 ()
0 // return an integer exit code
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运行时,日志文件log.txt
应包含类似于:
2016-03-28 11:16:07.2901|TRACE|file|In Main @1.
2016-03-28 11:16:07.3181|TRACE|file|In Library @1.
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并注意,NLog.config
文件 不创建.
在MyLibrary.Script.fsx中
// print out __SOURCE_DIRECTORY__ to make sure we are not using the Temp directory
printfn __SOURCE_DIRECTORY__
#I __SOURCE_DIRECTORY__
// Inform F# Interactive where to find functions in Log module
#I "../Log/bin/Debug/"
#r "Log.dll"
open Log
// Functions in Log module can now be run.
MyLog.configureNLogPrgramatically ()
MyLog.printNLogConfig ()
// Inform F# Interactive where to find functions in MyLibrary module
#I "../MyLibrary/bin/Debug/"
#r "MyLibrary.dll"
open Library1
// Functions in MyLibrary module can now be run.
MyFunctions.test001 ()
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使用F#Interactive执行脚本时
Microsoft (R) F# Interactive version 14.0.23413.0
Copyright (c) Microsoft Corporation. All Rights Reserved.
For help type #help;;
>
<Solution directory>\MyLibrary
val it : unit = ()
--> Added <Solution directory>\MyLibrary' to library include path
--> Added <Solution directory>\MyLibrary\../Log/bin/Debug/' to library include path
--> Referenced <Solution directory>\MyLibrary\../Log/bin/Debug/Log.dll'
File Target[file]
logNamePattern: (:All) levels: [ Trace Debug Info Warn Error Fatal ] appendTo: [ file ]
--> Added <Solution directory>\MyLibrary\../MyLibrary/bin/Debug/' to library include path
--> Referenced <Solution directory>\MyLibrary\../MyLibrary/bin/Debug/MyLibrary.dll'
val it : unit = ()
>
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日志文件log.txt
应包含类似于:
2016-03-28 11:42:41.5417|TRACE|file|In Library @1.
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此外,这将在您仍有活动的F#Interactive会话时进行记录,因此您可以查看执行命令之间的日志.
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