Question

我一直在尝试使用Azure-Functions中的.config文件。

如果我写这个功能

using System;
using System.Configuration;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;

using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Azure.WebJobs.Host;


namespace GranadaCoder.AzurePoc.AzureFunctionsOne
{
    public static class AppSettingsTestOne
    {
        [FunctionName("AppSettingsTestOneFunctionName")]
        public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = null)]HttpRequestMessage req, TraceWriter log)
        {

            try
            {

                string rootDirectory = string.Empty;
                if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("HOME")))
                {
                    /* running in azure */
                    rootDirectory = Environment.GetEnvironmentVariable("HOME") + "\\site\\wwwroot";
                }
                else
                {
                    /* in visual studio, local debugging */
                    rootDirectory = ".";
                }
                string path = rootDirectory + @"\CustomConfigFiles\CustomAppSettings.config";

                if (!System.IO.File.Exists(path))
                {
                    throw new System.IO.FileNotFoundException(string.Format("NOT FOUND!!! ('{0}')", path));
                }
                else
                {
                    log.Info(string.Format("File exists='{0}'", path));
                }

                ExeConfigurationFileMap map = new ExeConfigurationFileMap { ExeConfigFilename = path };
                Configuration config = ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);

                Configuration fileConfig = ConfigurationManager.OpenExeConfiguration(path); /* does NOT work */
                string val1 = config.AppSettings.Settings["KeyOne"].Value;
                string val2 = config.AppSettings.Settings["KeyTwo"].Value;
                string val3 = config.AppSettings.Settings["KeyThree"].Value;

                string msg = string.Join(",", val1, val2, val3);

                return req.CreateResponse(HttpStatusCode.OK, msg);
            }
            catch (Exception ex)
            {
                string errorMsg = ex.Message; //  ExceptionHelper.GenerateFullFlatMessage(ex);
                log.Error(errorMsg);
                return req.CreateResponse(HttpStatusCode.BadRequest, errorMsg);
            }
        }
    }
}

使用此.config文件（CustomAppSettings.config）

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <appSettings>
    <add key="KeyOne" value="ValueOne" />
    <add key="KeyTwo" value="ValueTwo" />
    <add key="KeyThree" value="ValueThree" />
  </appSettings>
</configuration>

它按预期工作。

如果我使用此功能：

using System;
using System.Collections.Specialized;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Xml;

using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Azure.WebJobs.Host;


namespace GranadaCoder.AzurePoc.AzureFunctionsOne
{
    public static class NameValuePairAppSettingsTest
    {
        [FunctionName("NameValuePairAppSettingsTestFunctionName")]
        public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = null)]HttpRequestMessage req, TraceWriter log)
        {

            try
            {
                string rootDirectory = string.Empty;
                if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("HOME")))
                {
                    /* running in azure */
                    rootDirectory = Environment.GetEnvironmentVariable("HOME") + "\\site\\wwwroot";
                }
                else
                {
                    /* in visual studio, local debugging */
                    rootDirectory = ".";
                }
                string path = rootDirectory + @"\CustomConfigFiles\NameValuePairSettings.config";


                if (!System.IO.File.Exists(path))
                {
                    throw new System.IO.FileNotFoundException(string.Format("NOT FOUND!!! ('{0}')", path));
                }
                else
                {
                    log.Info(string.Format("file exists='{0}'", path));
                }

                ExeConfigurationFileMap map = new ExeConfigurationFileMap { ExeConfigFilename = path };
                Configuration config = ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);

                //NameValueCollection nvc = (NameValueCollection)config.GetSection("myLittleArea"); /* does not work */

                ConfigurationSection myParamsSection = config.GetSection("myLittleArea");
                /* see https://stackoverflow.com/questions/13825323/how-do-i-get-the-values-from-a-configsection-defined-as-namevaluesectionhandler */
                string myParamsSectionRawXml = myParamsSection.SectionInformation.GetRawXml();
                XmlDocument sectionXmlDoc = new XmlDocument();
                sectionXmlDoc.Load(new StringReader(myParamsSectionRawXml));
                NameValueSectionHandler handler = new NameValueSectionHandler();
                NameValueCollection nvc = handler.Create(null, null, sectionXmlDoc.DocumentElement) as NameValueCollection;

                var items = nvc.AllKeys.SelectMany(nvc.GetValues, (k, v) => new { key = k, value = v });
                ////////foreach (var item in items)
                ////////{
                ////////    Console.WriteLine("{0} {1}", item.key, item.value);
                ////////}

                string msg = string.Join(",", items.ToList());

                return req.CreateResponse(HttpStatusCode.OK, msg);
            }
            catch (Exception ex)
            {
                string errorMsg = ex.Message; //  ExceptionHelper.GenerateFullFlatMessage(ex);
                log.Error(errorMsg);
                return req.CreateResponse(HttpStatusCode.BadRequest, errorMsg);
            }
        }
    }
}

使用此.config文件（NameValuePairSettings.config）

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="myLittleArea" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0,Culture=neutral, PublicKeyToken=b77a5c561934e089" />
  </configSections>

  <myLittleArea>
    <add key="color" value="red"/>
    <add key="street" value="main"/>
    <add key="month" value="july"/>
    <add key="candy" value="snickers"/>
  </myLittleArea>

</configuration>

一切正常。

（Drum Roll）。

如果我创建自定义配置部分。

using System.Configuration;

namespace GranadaCoder.AzurePoc.ConfigurationLibrary.MyCustomConfigurationSettings
{
    public static class MyCustomConfigurationSettingsConfigurationRetriever
    {
        public static readonly string ConfigurationSectionName = "MyCustomConfigurationSettingsConfigurationSectionName";

        /*
        public static MyCustomConfigurationSettingsConfigurationSection GetMyCustomConfigurationSettings()
        {
            MyCustomConfigurationSettingsConfigurationSection returnSection = (MyCustomConfigurationSettingsConfigurationSection)ConfigurationManager.GetSection(ConfigurationSectionName);
            if (returnSection != null)
            {
                return returnSection;
            }

            return null;
        }
        */

        public static MyCustomConfigurationSettingsConfigurationSection GetMyCustomConfigurationSettings(System.Configuration.Configuration cfg)
        {
            MyCustomConfigurationSettingsConfigurationSection returnSection = (MyCustomConfigurationSettingsConfigurationSection)cfg.GetSection(ConfigurationSectionName);
            if (returnSection != null)
            {
                return returnSection;
            }

            return null;
        }
    }
}

和

using System.Configuration;

namespace GranadaCoder.AzurePoc.ConfigurationLibrary.MyCustomConfigurationSettings
{
    public class MyCustomConfigurationSettingsConfigurationSection : ConfigurationSection
    {
        private const string FavoriteNumberPropertyName = "FavoriteNumber";
        private const string FavoriteColorPropertyName = "FavoriteColor";

        [ConfigurationProperty(FavoriteNumberPropertyName, IsRequired = true, DefaultValue = 100)]
        public int FavoriteNumber
        {
            get
            {
                return (int)this[FavoriteNumberPropertyName];
            }
        }

        [ConfigurationProperty(FavoriteColorPropertyName, IsRequired = true, DefaultValue = ",")]
        public string FavoriteColor
        {
            get
            {
                return (string)this[FavoriteColorPropertyName];
            }
        }
    }
}

和.config（MyCustomConfigurationSettings.config）

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name ="MyCustomConfigurationSettingsConfigurationSectionName" type="GranadaCoder.AzurePoc.ConfigurationLibrary.MyCustomConfigurationSettings.MyCustomConfigurationSettingsConfigurationSection, GranadaCoder.AzurePoc.ConfigurationLibrary" />
  </configSections>
  <MyCustomConfigurationSettingsConfigurationSectionName
    FavoriteNumber="333"
    FavoriteColor="Green"
  >
  </MyCustomConfigurationSettingsConfigurationSectionName>
</configuration>

和azure功能代码

using System;
using System.Configuration;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;

using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Azure.WebJobs.Host;

using GranadaCoder.AzurePoc.ConfigurationLibrary.MyCustomConfigurationSettings;



namespace GranadaCoder.AzurePoc.AzureFunctionsOne
{
    public static class CustomConfigurationTest
    {
        [FunctionName("CustomConfigurationTestFunctionName")]
        public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = null)]HttpRequestMessage req, TraceWriter log)
        {
            try
            {
                string rootDirectory = string.Empty;
                if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("HOME")))
                {
                    /* running in azure */
                    rootDirectory = Environment.GetEnvironmentVariable("HOME") + "\\site\\wwwroot";
                }
                else
                {
                    /* in visual studio, local debugging */
                    rootDirectory = ".";
                }
                string path = rootDirectory + @"\CustomConfigFiles\MyCustomConfigurationSettings.config";

                log.Info(string.Format("CustomConfigurationTestFunctionName HostingEnvironment.ApplicationPhysicalPath='{0}'", System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath));

                if (!System.IO.File.Exists(path))
                {
                    throw new System.IO.FileNotFoundException(string.Format("NOT FOUND!!! ('{0}')", path));
                }
                else
                {
                    log.Info(string.Format("File exists='{0}'", path));
                }

                ExeConfigurationFileMap map = new ExeConfigurationFileMap { ExeConfigFilename = path };
                Configuration config = ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);

                MyCustomConfigurationSettingsConfigurationSection customSection = MyCustomConfigurationSettingsConfigurationRetriever.GetMyCustomConfigurationSettings(config);

                string msg = string.Join(",", customSection.FavoriteNumber.ToString(), customSection.FavoriteColor);

                return req.CreateResponse(HttpStatusCode.OK, msg);
            }
            catch (Exception ex)
            {
                string errorMsg = ex.Message; //  ExceptionHelper.GenerateFullFlatMessage(ex);
                log.Error(errorMsg);
                return req.CreateResponse(HttpStatusCode.BadRequest, errorMsg);
            }
        }
    }
}

以上不起作用。

我收到错误

＆＃34;为MyCustomConfigurationSettingsConfigurationSectionName创建配置节处理程序时出错：无法加载文件或程序集＆＃39; GranadaCoder.AzurePoc.ConfigurationLibrary＆＃39;或其中一个依赖项。该系统找不到指定的文件。（C：\ blah \ blah \ blah \ bin \ Debug \ net461 \ CustomConfigFiles \ MyCustomConfigurationSettings.config第4行）＆＃34;

文件IS THERE（见图）

知道为什么自定义配置不起作用吗？

Answer 1

在Azure函数中打印出当前域的BaseDirectory之后，我发现该函数是由fun.exe运行的。它将在“AppData \ Local \ Azure.Functions.Cli \ 1.0.1 \”文件夹中查找程序集。将“GranadaCoder.AzurePoc.ConfigurationLibrary”复制到该文件夹后，该功能将正常工作。

代码：

string friendlyName = AppDomain.CurrentDomain.FriendlyName;
string baseDirectory = AppDomain.CurrentDomain.BaseDirectory;

输出：

BaseDirectory = "C:\\Users\\myusername\\AppData\\Local\\Azure.Functions.Cli\\1.0.1\\"
FriendlyName = "func.exe"

Answer 2

Azure函数仅支持app.config的有限部分。从VS运行功能时，它允许将应用程序设置和连接保存在local.settings.json中。该json文件中的system.serviceModel下不支持WCF端点设置。我在AzureFunction中有一个dll库参考，并且在内部调用WCF api。

我发现的奇怪之处是，当我运行Azure函数时，它将cli路径下的json转换回xml配置（C：\ Users \ <<机器名称>> \ AppData \ Local \ AzureFunctionsTools \ Releases \ 1.6 .0 \ cli \ func.exe.config）。我将xml配置层次结构（system.serviceModel）添加到此配置文件中，并且工作正常，选择了WCF端点以运行服务。尽管在使用log4net配置方面遇到了困难，但是很好地运行API。

希望这会有所帮助。

在Azure-Functions中配置文件和检索

2 个答案: