C# 将消息记录到以前创建的日志文件

我正在asp.net网站中使用enterprise library 5.0登录，
我的

web.config

文件如下：

<?xml version="1.0"?>
<configuration>
    <configSections>
        <section name="loggingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.LoggingSettings, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true"/>
    </configSections>
    <loggingConfiguration name="FlatFileLogging" tracingEnabled="true"
        defaultCategory="General">
        <listeners>
            <add name="Flat File Trace Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FlatFileTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FlatFileTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                fileName="C:\Logs\2013-06-28 14-21-53.log" header="" footer=""
                formatter="Text Formatter" traceOutputOptions="DateTime" />
        </listeners>
        <formatters>
            <add type="Microsoft.Practices.EnterpriseLibrary.Logging.Formatters.TextFormatter, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                template="{timestamp}, {severity}, {message}" name="Text Formatter" />
        </formatters>
        <categorySources>
            <add switchValue="All" name="General">
                <listeners>
                    <add name="Flat File Trace Listener" />
                </listeners>
            </add>
        </categorySources>
        <specialSources>
            <allEvents switchValue="All" name="All Events" />
            <notProcessed switchValue="All" name="Unprocessed Category" />
            <errors switchValue="All" name="Logging Errors &amp; Warnings">
                <listeners>
                    <add name="Flat File Trace Listener" />
                </listeners>
            </errors>
        </specialSources>
    </loggingConfiguration>
    <appSettings/>
    <connectionStrings/>
    <system.web>
        <compilation debug="true" targetFramework="4.0">
        </compilation>
        <authentication mode="Windows"/>
        <pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"/></system.web>
</configuration>

每当我更改日志文件路径并向文件发送日志消息时，日志不会转到新创建的文件。日志消息转到以前设置的文件路径。似乎新的环境并没有立即反映出来

string path = "C:\\Logs\\" + DateTime.Now.ToString("yyyy-MM-dd HH-mm-ss") + ".log";
SetLogFilePath(path);
Logger.Write(message, "General", 1, 0, System.Diagnostics.TraceEventType.Information); 

如何刷新新设置以立即编码？

如何定义“立即”？如果您的意思是在执行请求的中间，那么我认为您不能通过配置来实现这一点，因为该配置不会刷新该请求。 这是一个基于博客帖子的实现，对我来说似乎很有效。我不会将配置更改写回磁盘，而是在内存中更改

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        EnterpriseLibraryContainer.Current.GetInstance<LogWriter>()
            .Write("test", "General");

        string path = "C:\\Logs\\anotherlogfile.log";
        SetLogFilePath(path);

        EnterpriseLibraryContainer.Current.GetInstance<LogWriter>()
            .Write("Another test", "General");
    }

    public void SetLogFilePath(string filePath)
    {
        ConfigurationFileMap objConfigPath = new ConfigurationFileMap();

        // App config file path.
        string appPath = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
        objConfigPath.MachineConfigFilename = appPath;

        Configuration entLibConfig = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~");

        LoggingSettings loggingSettings = (LoggingSettings)entLibConfig.GetSection(LoggingSettings.SectionName);

        TraceListenerData traceListenerData = loggingSettings.TraceListeners.Get("Flat File Trace Listener");
        FlatFileTraceListenerData objFlatFileTraceListenerData = traceListenerData as FlatFileTraceListenerData;

        objFlatFileTraceListenerData.FileName = filePath;

        IUnityContainer container = new UnityContainer();
        container.AddNewExtension<EnterpriseLibraryCoreExtension>();

        // Configurator will read Enterprise Library configuration 
        // and set up the container
        UnityContainerConfigurator configurator = new UnityContainerConfigurator(container);

        var loggingXmlConfigSource = new SerializableConfigurationSource();
        loggingXmlConfigSource.Add(LoggingSettings.SectionName, loggingSettings);

        // Configure the container with our own custom logging
        EnterpriseLibraryContainer.ConfigureContainer(configurator, loggingXmlConfigSource);

        // Wrap in ServiceLocator
        IServiceLocator locator = new UnityServiceLocator(container);

        // Release lock(s) on existing file(s)
        EnterpriseLibraryContainer.Current.GetInstance<LogWriter>().Dispose();

        // And set Enterprise Library to use it
        EnterpriseLibraryContainer.Current = locator;
    }
}

public class SerializableConfigurationSource : IConfigurationSource
{
    Dictionary<string, ConfigurationSection> sections = new Dictionary<string, ConfigurationSection>();

    public SerializableConfigurationSource()
    {
    }

    public ConfigurationSection GetSection(string sectionName)
    {
        ConfigurationSection configSection;

        if (sections.TryGetValue(sectionName, out configSection))
        {
            SerializableConfigurationSection section = configSection as SerializableConfigurationSection;

            if (section != null)
            {
                using (StringWriter xml = new StringWriter())
                using (XmlWriter xmlwriter = System.Xml.XmlWriter.Create(xml))
                {
                    section.WriteXml(xmlwriter);
                    xmlwriter.Flush();

                    MethodInfo methodInfo = section.GetType().GetMethod("DeserializeSection", BindingFlags.NonPublic | BindingFlags.Instance);
                    methodInfo.Invoke(section, new object[] { XDocument.Parse(xml.ToString()).CreateReader() });

                    return configSection;
                }
            }
        }

        return null;
    }

    public void Add(string sectionName, ConfigurationSection configurationSection)
    {
        sections[sectionName] = configurationSection;
    }

    public void AddSectionChangeHandler(string sectionName, ConfigurationChangedEventHandler handler)
    {
        throw new NotImplementedException();
    }

    public void Remove(string sectionName)
    {
        sections.Remove(sectionName);
    }

    public void RemoveSectionChangeHandler(string sectionName, ConfigurationChangedEventHandler handler)
    {
        throw new NotImplementedException();
    }

    public event EventHandler<ConfigurationSourceChangedEventArgs> SourceChanged;

    public void Dispose()
    {
    }
}

public分部类\u默认值：System.Web.UI.Page
{
受保护的无效页面加载（对象发送方、事件参数e）
{
EnterpriseLibraryContainer.Current.GetInstance（）
.编写（“测试”、“一般”）；
string path=“C:\\Logs\\anotherlogfile.log”；
SetLogFilePath（路径）；
EnterpriseLibraryContainer.Current.GetInstance（）
.编写（“另一项测试”、“一般测试”）；
}
public void SetLogFilePath（字符串文件路径）
{
ConfigurationFileMap objConfigPath=新的ConfigurationFileMap（）；
//应用程序配置文件路径。
字符串appPath=AppDomain.CurrentDomain.SetupInformation.ConfigurationFile；
objConfigPath.MachineConfigFilename=appPath；
Configuration entLibConfig=System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration（“~”）；
LoggingSettings LoggingSettings=（LoggingSettings）entLibConfig.GetSection（LoggingSettings.SectionName）；
TraceListenerData TraceListenerData=loggingSettings.TraceListeners.Get（“平面文件跟踪侦听器”）；
FlatFileTraceListenerData objFlatFileTraceListenerData=作为FlatFileTraceListenerData的traceListenerData；
objFlatFileTraceListenerData.FileName=文件路径；
IUnityContainer容器=新的UnityContainer（）；
container.AddNewExtension（）；
//Configurator将读取企业库配置
//并设置容器
UnityContainerConfiguration配置器=新的UnityContainerConfiguration（容器）；
var loggingXmlConfigSource=新的SerializableConfigurationSource（）；
loggingXmlConfigSource.Add（LoggingSettings.SectionName，LoggingSettings）；
//使用我们自己的自定义日志配置容器
EnterpriseLibraryContainer.ConfigureContainer（configurator，loggingXmlConfigSource）；
//包裹式服务定位器
IServiceLocator=新的UnityServiceLocator（容器）；
//释放现有文件上的锁
EnterpriseLibraryContainer.Current.GetInstance（）.Dispose（）；
//并将企业库设置为使用它
EnterpriseLibraryContainer.Current=定位器；
}
}
公共类SerializableConfigurationSource:IConfigurationSource
{
字典部分=新字典（）；
public SerializableConfigurationSource（）
{
}
公共配置节GetSection（字符串节名）
{
配置部分配置部分；
if（sections.TryGetValue（sectionName，out configSection））
{
SerializableConfigurationSection=configSection作为SerializableConfigurationSection；
if（节！=null）
{
使用（StringWriter xml=new StringWriter（））
使用（XmlWriter=System.Xml.XmlWriter.Create（Xml））
{
第.WriteXml节（xmlwriter）；
xmlwriter.Flush（）；
MethodInfo MethodInfo=section.GetType（）.GetMethod（“反序列化section”，BindingFlags.NonPublic | BindingFlags.Instance）；
调用（节，新对象[]{XDocument.Parse（xml.ToString（））.CreateReader（）}）；
返回段；
}
}
}
返回null；
}
public void Add（string section name，ConfigurationSection ConfigurationSection）
{
节[sectionName]=配置节；
}
public void AddSectionChangeHandler（字符串sectionName、ConfigurationChangedEventHandler处理程序）
{
抛出新的NotImplementedException（）；
}
公共无效删除（字符串节名）
{
节。删除（节名称）；
}
public void RemoveSectionChangeHandler（字符串节名称，ConfigurationChangedEventHandler处理程序）
{
抛出新的NotImplementedException（）；
}
公共事件事件处理程序源已更改；
公共空间处置（）
{
}
}

还是发生了同样的事情，当我第一次生成文件名并使用上面的

SetLogFilePath

函数设置日志文件时，它工作得很好，第二次生成日志文件路径并设置日志文件时，日志会转到先前创建的日志文件。我似乎工作正常：我使用了Ent.Lib 5.0.414.0，这（全部）使用您的代码需要程序集吗？使用UnityContainerConfiguration、EnterpriseLibraryContainer、IServiceLocator等需要哪些组件？非常感谢。你试过兰迪·利维的答案吗？您是否使用Ent.lib5.0.414.0？

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        EnterpriseLibraryContainer.Current.GetInstance<LogWriter>()
            .Write("test", "General");

        string path = "C:\\Logs\\anotherlogfile.log";
        SetLogFilePath(path);

        EnterpriseLibraryContainer.Current.GetInstance<LogWriter>()
            .Write("Another test", "General");
    }

    public void SetLogFilePath(string filePath)
    {
        ConfigurationFileMap objConfigPath = new ConfigurationFileMap();

        // App config file path.
        string appPath = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
        objConfigPath.MachineConfigFilename = appPath;

        Configuration entLibConfig = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~");

        LoggingSettings loggingSettings = (LoggingSettings)entLibConfig.GetSection(LoggingSettings.SectionName);

        TraceListenerData traceListenerData = loggingSettings.TraceListeners.Get("Flat File Trace Listener");
        FlatFileTraceListenerData objFlatFileTraceListenerData = traceListenerData as FlatFileTraceListenerData;

        objFlatFileTraceListenerData.FileName = filePath;

        IUnityContainer container = new UnityContainer();
        container.AddNewExtension<EnterpriseLibraryCoreExtension>();

        // Configurator will read Enterprise Library configuration 
        // and set up the container
        UnityContainerConfigurator configurator = new UnityContainerConfigurator(container);

        var loggingXmlConfigSource = new SerializableConfigurationSource();
        loggingXmlConfigSource.Add(LoggingSettings.SectionName, loggingSettings);

        // Configure the container with our own custom logging
        EnterpriseLibraryContainer.ConfigureContainer(configurator, loggingXmlConfigSource);

        // Wrap in ServiceLocator
        IServiceLocator locator = new UnityServiceLocator(container);

        // Release lock(s) on existing file(s)
        EnterpriseLibraryContainer.Current.GetInstance<LogWriter>().Dispose();

        // And set Enterprise Library to use it
        EnterpriseLibraryContainer.Current = locator;
    }
}

public class SerializableConfigurationSource : IConfigurationSource
{
    Dictionary<string, ConfigurationSection> sections = new Dictionary<string, ConfigurationSection>();

    public SerializableConfigurationSource()
    {
    }

    public ConfigurationSection GetSection(string sectionName)
    {
        ConfigurationSection configSection;

        if (sections.TryGetValue(sectionName, out configSection))
        {
            SerializableConfigurationSection section = configSection as SerializableConfigurationSection;

            if (section != null)
            {
                using (StringWriter xml = new StringWriter())
                using (XmlWriter xmlwriter = System.Xml.XmlWriter.Create(xml))
                {
                    section.WriteXml(xmlwriter);
                    xmlwriter.Flush();

                    MethodInfo methodInfo = section.GetType().GetMethod("DeserializeSection", BindingFlags.NonPublic | BindingFlags.Instance);
                    methodInfo.Invoke(section, new object[] { XDocument.Parse(xml.ToString()).CreateReader() });

                    return configSection;
                }
            }
        }

        return null;
    }

    public void Add(string sectionName, ConfigurationSection configurationSection)
    {
        sections[sectionName] = configurationSection;
    }

    public void AddSectionChangeHandler(string sectionName, ConfigurationChangedEventHandler handler)
    {
        throw new NotImplementedException();
    }

    public void Remove(string sectionName)
    {
        sections.Remove(sectionName);
    }

    public void RemoveSectionChangeHandler(string sectionName, ConfigurationChangedEventHandler handler)
    {
        throw new NotImplementedException();
    }

    public event EventHandler<ConfigurationSourceChangedEventArgs> SourceChanged;

    public void Dispose()
    {
    }
}