在ADO.NET实体中未检测到连接字符串

Question

我第一次尝试了ADO.Net Data实体模型，并想与linq一起工作。我做了我的实体连接并按照代码来测试连接：

Public Function SaveContact(ByVal ContactValue As Contact, ByVal IsNew As Boolean) As String Implements IContactService.SaveContact
    Dim db As New salessolEntities
    db.Database.Connection.Open()
    db.Database.Connection.Close()
    Return Nothing
End Function

但是，我收到以下错误：

  

在。中找不到名为'salessolEntities'的连接字符串   应用程序配置文件。

在app.config中正确设置了连接字符串： 默认版本（自动生成）：

  <connectionStrings>
    <add name="SalesSolWcfLib.My.MySettings.DBConnection" connectionString="server=localhost;User Id=root;password=surpavan;database=salessol;Persist Security Info=True;Old Guids=True" providerName="MySql.Data.MySqlClient" />
    <add name="salessolEntities" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=MySql.Data.MySqlClient;provider connection string=&quot;server=localhost;user id=root;password=surpavan;database=salessol;persist security info=True;old guids=True&quot;" providerName="System.Data.EntityClient" />
  </connectionStrings>

一个小修改：

  <connectionStrings>
    <add name="SalesSolWcfLib.My.MySettings.DBConnection" connectionString="server=localhost;User Id=root;password=surpavan;database=salessol;Persist Security Info=True;Old Guids=True" providerName="MySql.Data.MySqlClient" />
    <add name="salessolEntities" connectionString="server=localhost;User Id=root;password=surpavan;database=salessol;Persist Security Info=True;Old Guids=True" providerName="MySql.Data.MySqlClient" />
  </connectionStrings>

另一个修改：

<connectionStrings>

        <add name="SalesSolWcfLib.My.MySettings.DBConnection" connectionString="server=localhost;User Id=root;password=surpavan;database=salessol;Persist Security Info=True;Old Guids=True" providerName="MySql.Data.MySqlClient" />
        <add name="SalesSolWcfLib.My.MySettings.salessolEntities" connectionString="server=localhost;User Id=root;password=surpavan;database=salessol;Persist Security Info=True;Old Guids=True" providerName="MySql.Data.MySqlClient" />
      </connectionStrings>

整个App.config：

<?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=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <connectionStrings>
    <add name="SalesSolWcfLib.My.MySettings.DBConnection" connectionString="server=localhost;User Id=root;password=surpavan;database=salessol;Persist Security Info=True;Old Guids=True" providerName="MySql.Data.MySqlClient" />
    <add name="SalesSolWcfLib.My.MySettings.salessolEntities" connectionString="server=localhost;User Id=root;password=surpavan;database=salessol;Persist Security Info=True;Old Guids=True" providerName="MySql.Data.MySqlClient" />
      </connectionStrings>
      <appSettings>
        <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
        <add key="ClientSettingsProvider.ServiceUri" value="" />
      </appSettings>
      <system.web>
        <compilation debug="true" />
        <membership defaultProvider="ClientAuthenticationMembershipProvider">
          <providers>
            <add name="ClientAuthenticationMembershipProvider" type="System.Web.ClientServices.Providers.ClientFormsAuthenticationMembershipProvider, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" serviceUri="" />
          </providers>
        </membership>
        <roleManager defaultProvider="ClientRoleProvider" enabled="true">
          <providers>
            <add name="ClientRoleProvider" type="System.Web.ClientServices.Providers.ClientRoleProvider, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" serviceUri="" cacheTimeout="86400" />
          </providers>
        </roleManager>
      </system.web>
      <!-- When deploying the service library project, the content of the config file must be added to the host's 
      app.config file. System.Configuration does not support config files for libraries. -->
      <system.serviceModel>
        <services>
          <service name="SalesSolWcfLib.Service1">
            <endpoint address="" binding="basicHttpBinding" contract="SalesSolWcfLib.IService1">
              <identity>
                <dns value="localhost" />
              </identity>
            </endpoint>
            <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
            <host>
              <baseAddresses>
                <add baseAddress="http://localhost:8733/Design_Time_Addresses/SalesSolWcfLib/Service1/" />
              </baseAddresses>
            </host>
          </service>
          <service name="SalesSolWcfLib.ContactService">
            <endpoint address="" binding="basicHttpBinding" contract="SalesSolWcfLib.IContactService">
              <identity>
                <dns value="localhost" />
              </identity>
            </endpoint>
            <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
            <host>
              <baseAddresses>
                <add baseAddress="http://localhost:8733/Design_Time_Addresses/SalesSolWcfLib/ContactService/" />
              </baseAddresses>
            </host>
          </service>
        </services>
        <behaviors>
          <serviceBehaviors>
            <behavior>
              <!-- To avoid disclosing metadata information, 
              set the values below to false before deployment -->
              <serviceMetadata httpGetEnabled="True" httpsGetEnabled="True" />
              <!-- To receive exception details in faults for debugging purposes, 
              set the value below to true.  Set to false before deployment 
              to avoid disclosing exception information -->
              <serviceDebug includeExceptionDetailInFaults="False" />
            </behavior>
          </serviceBehaviors>
        </behaviors>
      </system.serviceModel>
      <entityFramework>
        <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
          <parameters>
            <parameter value="v11.0" />
          </parameters>
        </defaultConnectionFactory>
      </entityFramework>
    </configuration>

请告知我哪个部分出错了，这是一个带有Mysql的WCF项目。我与“SalesSolWcfLib.My.MySettings.DBConnection”的手动连接效果很好，但是对于ado.net我正面临这个问题。请纠正我错误的地方。