Question

我有一个包含VB.NET项目和C＃项目的解决方案。 VB.NET项目是主要项目。它引用了用户管理服务的C＃项目。两者都连接到同一个数据库。该数据库的连接字符串存储在VB.NET项目的app.config文件中。它还包含其他用户和应用程序级别设置。我可以使用以下代码行从C＃内部的配置中读取连接字符串：

String connectionString = ConfigurationManager.ConnectionStrings["Kais2012.My.MySettings.ConnectionString"].ConnectionString;

配置文件中包含的其他应用程序级属性之一称为“TeamId”。我已经编写了以下代码来从C＃中读取它。

String teamId = ConfigurationManager.AppSettings["Kais2012.My.MySettings.TeamId"];

这不起作用，我无法弄清楚原因。任何帮助将不胜感激。感谢。

它不起作用的方式是teamId返回null。这是app.config文件的内容。

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
            <section name="Kais2012.My.MySettings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
        </sectionGroup>
        <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
            <section name="Kais2012.My.MySettings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
        </sectionGroup>
    </configSections>
  <startup useLegacyV2RuntimeActivationPolicy="true">
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  </startup>
    <connectionStrings configProtectionProvider="DataProtectionConfigurationProvider">
        <EncryptedData>
            <CipherData>
                <CipherValue>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</CipherValue>
            </CipherData>
        </EncryptedData>
    </connectionStrings>
    <system.diagnostics>
        <sources>
            <!-- This section defines the logging configuration for My.Application.Log -->
            <source name="DefaultSource" switchName="DefaultSwitch">
                <listeners>
                    <add name="FileLog"/>
                    <!-- Uncomment the below section to write to the Application Event Log -->
                    <!--<add name="EventLog"/>-->
                </listeners>
            </source>
        </sources>
        <switches>
            <add name="DefaultSwitch" value="Information" />
        </switches>
        <sharedListeners>
            <add name="FileLog"
                 type="Microsoft.VisualBasic.Logging.FileLogTraceListener, Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL"
                 initializeData="FileLogWriter"/>
            <!-- Uncomment the below section and replace APPLICATION_NAME with the name of your application to write to the Application Event Log -->
            <!--<add name="EventLog" type="System.Diagnostics.EventLogTraceListener" initializeData="APPLICATION_NAME"/> -->
        </sharedListeners>
    </system.diagnostics>
    <userSettings>
        <Kais2012.My.MySettings>
            <setting name="AutoNavigation" serializeAs="String">
                <value>True</value>
            </setting>
            <setting name="UseOsk" serializeAs="String">
                <value>False</value>
            </setting>
            <setting name="AutoHideOsk" serializeAs="String">
                <value>False</value>
            </setting>
            <setting name="StretchReviewColumns" serializeAs="String">
                <value>True</value>
            </setting>
            <setting name="DiscountSkipped" serializeAs="String">
                <value>True</value>
            </setting>
            <setting name="AutoDelay" serializeAs="String">
                <value>0</value>
            </setting>
            <setting name="MinAutoDelay" serializeAs="String">
                <value>1000</value>
            </setting>
        </Kais2012.My.MySettings>
    </userSettings>
    <applicationSettings>
        <Kais2012.My.MySettings>
            <setting name="DummyColumn" serializeAs="String">
                <value>CreationTime</value>
            </setting>
            <setting name="PublisherDBName" serializeAs="String">
                <value>kais_final</value>
            </setting>
            <setting name="PublicationName" serializeAs="String">
                <value>pbl_kais_WAKHUTU-PC</value>
            </setting>
            <setting name="SubscriptionDBName" serializeAs="String">
                <value>KAISEQ_USER001</value>
            </setting>
            <setting name="SubscriberServerName" serializeAs="String">
                <value>USER001</value>
            </setting>
            <setting name="PublisherServerName" serializeAs="String">
                <value>WAKHUTU-PC</value>
            </setting>
            <setting name="PublisherLogin" serializeAs="String">
                <value>sa</value>
            </setting>
            <setting name="PublisherPassword" serializeAs="String">
                <value>xxxxxx</value>
            </setting>
            <setting name="UploadToServer" serializeAs="String">
                <value>1</value>
            </setting>
            <setting name="IpAddress" serializeAs="String">
                <value>172.23.14.94</value>
            </setting>
            <setting name="DownloadFromServer" serializeAs="String">
                <value>2</value>
            </setting>
            <setting name="UploadAndDownload" serializeAs="String">
                <value>3</value>
            </setting>
            <setting name="SubscriberPassword" serializeAs="String">
                <value>xxxxxx</value>
            </setting>
            <setting name="PublishingSubscriberServerName" serializeAs="String">
                <value>SUP01</value>
            </setting>
            <setting name="PublishingSubscriberLogin" serializeAs="String">
                <value>sa</value>
            </setting>
            <setting name="PublishingSubscriberPassword" serializeAs="String">
                <value>xxxxxx</value>
            </setting>
            <setting name="PublishingSubscriberDBName" serializeAs="String">
                <value>KAISEQ_SUP01</value>
            </setting>
            <setting name="publishingSubscriberPublicationName" serializeAs="String">
                <value>pbl_kais_KAISEQ_SUP01</value>
            </setting>
            <setting name="SubscriberLogin" serializeAs="String">
                <value>sa</value>
            </setting>
            <setting name="TeamId" serializeAs="String">
                <value>2</value>
            </setting>
            <setting name="DevMode" serializeAs="String">
                <value>True</value>
            </setting>
            <setting name="DevUsername" serializeAs="String">
                <value>admin</value>
            </setting>
            <setting name="DevPassword" serializeAs="String">
                <value>admin</value>
            </setting>
        </Kais2012.My.MySettings>
    </applicationSettings>
</configuration>

Answer 1

ConfigurationManager.AppSettings[""]

具体而言，请参阅配置部分<appSettings>，而不是名为<applicationSettings>的自定义配置部分组。将配置移至正确的部分或实施自定义ConfigurationSection并使用：

ConfigurationManager.GetSection()

Answer 2

使用此：

System.Configuration.ConfigurationManager.AppSettings[""]

Answer 3

您可以在C＃项目中将设置标记为公共（设置的属性窗格中的“访问修饰符”），然后您可以从vb项目访问它（不要忘记添加引用）。

 Dim settings = New ClassLibraryCSharp.Properties.Settings
 dim con = settings.ConnectionString

修改刚看到你的问题是针对另一个方向的（在vb项目中设置，在c＃项目中读取）。但你也可以在另一个方向上做到这一点。

如何阅读＆＃34; app.config＆＃34;来自C＃的VB.NET项目中的文件

3 个答案: