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vb.net - 在应用程序配置文件中找不到名为“ATX_PLSNGEntities”的连接字符串，尽管它包含在内

问题描述

我有两个项目：

第一个 (VTB_Terminliste) 是使用实体框架构建为类库 (.dll)。第一个项目

第二个是主应用程序，其中包括 VTB_Terminliste 作为 .dll，我想在单击按钮后显示它，例如：

Private Sub btnTerminliste_Click(sender As Object, e As EventArgs) Handles btnTerminliste.Click
   Dim l As New VTB_Terminliste.MainView
   l.Show()
End Sub

第二个项目

在主应用程序的 App.Config 中，我为我的实体插入连接字符串

<add name="ATX_PLSNGEntities" connectionString="metadata=res://*/DBA_Terminliste.csdl|res://*/DBA_Terminliste.ssdl|res://*/DBA_Terminliste.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=atx-srv-58;initial catalog=ATX_PLSNG;persist security info=True;user id=SomeUser;password=SomePW;MultipleActiveResultSets=True;App=EntityFramework&quot;"
            providerName="System.Data.EntityClient" />

启动并单击按钮后，btnTerminliste出现错误“在应用程序配置文件中找不到名为'ATX_PLSNGEntities'的连接字符串”

如果我以 WinForm 的形式启动 VTB_Terminliste 项目，那么一切正常。

这是我的 App.Config 来自项目 VTB_Terminliste 和主应用程序

VTB_Terminliste

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System">
      <section name="DevExpress.LookAndFeel.Design.AppSettings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </sectionGroup>
  </configSections>
  <applicationSettings>
    <DevExpress.LookAndFeel.Design.AppSettings>
      <setting name="DefaultAppSkin" serializeAs="String">
        <value>Skin/The Bezier</value>
      </setting>
      <setting name="DefaultPalette" serializeAs="String">
        <value>Gloom Gloom</value>
      </setting>
      <setting name="TouchUI" serializeAs="String">
        <value></value>
      </setting>
      <setting name="TouchScaleFactor" serializeAs="String">
        <value></value>
      </setting>
      <setting name="DirectX" serializeAs="String">
        <value>True</value>
      </setting>
      <setting name="RegisterUserSkins" serializeAs="String">
        <value></value>
      </setting>
      <setting name="FontBehavior" serializeAs="String">
        <value></value>
      </setting>
      <setting name="DefaultAppFont" serializeAs="String">
        <value></value>
      </setting>
      <setting name="DPIAwarenessMode" serializeAs="String">
        <value>System</value>
      </setting>
    </DevExpress.LookAndFeel.Design.AppSettings>
  </applicationSettings>
  <system.diagnostics>
    <sources>
      <!-- Dieser Abschnitt definiert die Protokollierungskonfiguration für My.Application.Log -->
      <source name="DefaultSource" switchName="DefaultSwitch">
        <listeners>
          <add name="FileLog" />
          <!-- Auskommentierung des nachfolgenden Abschnitts aufheben, um in das Anwendungsereignisprotokoll zu schreiben -->
          <!--<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" />
      <!-- Auskommentierung des nachfolgenden Abschnitts aufheben und APPLICATION_NAME durch den Namen der Anwendung ersetzen, um in das Anwendungsereignisprotokoll zu schreiben -->
      <!--<add name="EventLog" type="System.Diagnostics.EventLogTraceListener" initializeData="APPLICATION_NAME"/> -->
    </sharedListeners>
  </system.diagnostics>
  <connectionStrings>
    <add name="ATX_PLSNGEntities" connectionString="metadata=res://*/DBA_Terminliste.csdl|res://*/DBA_Terminliste.ssdl|res://*/DBA_Terminliste.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=atx-srv-58;initial catalog=ATX_PLSNG;persist security info=True;user id=SomeUser;password=SomePW;MultipleActiveResultSets=True;App=EntityFramework&quot;"
      providerName="System.Data.EntityClient" />
  </connectionStrings>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="mssqllocaldb" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
</configuration>

主要应用

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
    </configSections>
    <connectionStrings>
        <add name="ATX_DBA_Test_Connection" connectionString="XpoProvider=MSSqlServer;data source=atx-srv-28;user id=sa;password=Zu3545Uz;initial catalog=ATX_DBA_Test;Persist Security Info=true" />
        <add name="ATX_PLSNGEntities" connectionString="metadata=res://*/DBA_Terminliste.csdl|res://*/DBA_Terminliste.ssdl|res://*/DBA_Terminliste.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=atx-srv-58;initial catalog=ATX_PLSNG;persist security info=True;user id=SomeUser;password=SomePW;MultipleActiveResultSets=True;App=EntityFramework&quot;"
            providerName="System.Data.EntityClient" />
    </connectionStrings>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
    </startup>
</configuration>

我希望有人可以帮助我找到解决方案。

标签： vb.netentity-framework

解决方案

我解决了在里面添加连接字符串的问题.Context.vb

Partial Public Class ATX_PLSNGEntities
    Inherits DbContext

    Public Sub New()
      MyBase.New("metadata=res://*/DBA_Terminliste.csdl|res://*/DBA_Terminliste.ssdl|res://*/DBA_Terminliste.msl;provider=System.Data.SqlClient;provider connection string='data source=SomeServer;initial catalog=ATX_PLSNG;persist security info=True;user id=SomeUser;password=SomePW;MultipleActiveResultSets=True;App=EntityFramework'")
    End Sub

    Protected Overrides Sub OnModelCreating(modelBuilder As DbModelBuilder)
      Throw New UnintentionalCodeFirstException()
    End Sub

    Public Overridable Property Terminliste() As DbSet(Of Terminliste)

  End Class

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