我正在用C#构建Form应用程序。我也使用实体框架来连接数据库。
但是,如果我尝试启动该应用程序,则会出现以下错误:
//------------------------------------------------------------------------------
// <auto-generated>
// Codice generato da un modello.
//
// Le modifiche manuali a questo file potrebbero causare un comportamento imprevisto dell'applicazione.
// Se il codice viene rigenerato, le modifiche manuali al file verranno sovrascritte.
// </auto-generated>
//------------------------------------------------------------------------------
namespace MSLab
{
using System;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
public partial class MsLabEntities2 : DbContext
{
public MsLabEntities2()
: base("name=MsLabEntities2")
{
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
throw new UnintentionalCodeFirstException();
}
public virtual DbSet<Registrazioni> Registrazioni { get; set; }
public virtual DbSet<RegistrazioniXAzione> RegistrazioniXAzione { get; set; }
}
}
错误在以下行代码上:
: base("name=MsLabEntities2")
Unhandled exception of type 'System.TypeInitializationException' in EntityFramework.dll
Additional information: The type initializer of 'System.Data.Entity.Internal.AppConfig' threw an exception.
这是我的App.config文件
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<!-- 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" />
</configSections>
<appsettings>
<WpfApplication1.Properties.Settings>
<setting name="inactivity_interval" serializeAs="String">
<value>10</value>
</setting>
<setting name="maximumHeightPopUp" serializeAs="String">
<value>260</value>
</setting>
<setting name="horizontalArrowsHeight" serializeAs="String">
<value>35</value>
</setting>
<setting name="modelsListHeight" serializeAs="String">
<value>100</value>
</setting>
</WpfApplication1.Properties.Settings>
</appsettings>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<connectionStrings>
<add name="MsLabEntities" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider connection string="data source=TELESIO\SQLSERVER;initial catalog=MsLab;persist security info=True;user id=sa;password=Er$sult12345;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
<add name="MsLabEntities1" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider connection string="data source=TELESIO\SQLSERVER;initial catalog=MsLab;user id=sa;password=Er$sult12345;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
<add name="MsLabEntities2" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider connection string="data source=TELESIO\SQLSERVER;initial catalog=MsLab;user id=sa;password=Er$sult12345;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
这是我的packages.config文件
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="EntityFramework" version="6.1.3" targetFramework="net45" />
<package id="EntityFramework.it" version="6.1.3" targetFramework="net45" />
</packages>
尝试将app.config的entityFramework部分更新为此
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework">
<parameters>
<parameter value="<My Connection String>" />
</parameters>
</defaultConnectionFactory>
</entityFramework>
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