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实体框架6.0.1 我的App.config：实体框架：提供程序未返回providermanifest实例
<?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" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
</startup>
<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>
<connectionStrings>
<add name="MyDataContext" connectionString="Data Source=MyDb;Initial Catalog=mycatalog;Persist Security Info=True;User ID=admin;Password=123;MultipleActiveResultSets=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
而且MyDataContext类使用EF：
public partial class MyDataContext: DbContext
{
static MyDataContext()
{
Database.SetInitializer<MyDataContext>(null);
}
public MyDataContext()
: base("MyDataContext")
{
}
}
创建上下文，但当我试图得到任何实体或做任何事情与数据库它抛出异常
using (var db = new MyDataContext())
{
var exists = db.Database.Exists();
}
例外是
System.Data.ProviderIncompatibleException: The provider did not return a providermanifest instance
StackTrace:
in System.Data.Common.DbProviderServices.GetProviderManifest(String manifestToken)
in System.Data.Entity.ModelConfiguration.Utilities.DbConnectionExtensions.GetProviderInfo(DbConnection connection, DbProviderManifest& providerManifest)
in System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
in System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
in System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
in System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
in System.Data.Entity.Internal.InternalContext.CreateObjectContextForDdlOps()
in System.Data.Entity.Database.Exists()
与内部异常：
System.Configuration.ConfigurationErrorException: Configuration system failed to initialize
StackTrace:
в System.Configuration.ClientConfigurationSystem.OnConfigRemoved(Object sender, InternalConfigEventArgs e)
в System.Configuration.Internal.InternalConfigRoot.RemoveConfigImpl(String configPath, BaseConfigurationRecord configRecord)
в System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
в System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
в System.Configuration.ConfigurationManager.GetSection(String sectionName)
в System.Xml.Schema.Parser..ctor(SchemaType schemaType, XmlNameTable nameTable, SchemaNames schemaNames, ValidationEventHandler eventHandler)
в System.Xml.Schema.XmlSchema.Read(XmlReader reader, ValidationEventHandler validationEventHandler)
в System.Data.Entity.Core.SchemaObjectModel.Schema.SomSchemaSetHelper.AddXmlSchemaToSet(XmlSchemaSet schemaSet, XmlSchemaResource schemaResource, HashSet`1 schemasAlreadyAdded)
в System.Data.Entity.Core.SchemaObjectModel.Schema.SomSchemaSetHelper.ComputeSchemaSet(SchemaDataModelOption dataModel)
в System.Data.Entity.Core.Common.Utils.Memoizer`2.<>c__DisplayClass2.<Evaluate>b__0()
в System.Data.Entity.Core.Common.Utils.Memoizer`2.Result.GetValue()
в System.Data.Entity.Core.Common.Utils.Memoizer`2.Evaluate(TArg arg)
в System.Data.Entity.Core.SchemaObjectModel.Schema.SomSchemaSetHelper.GetSchemaSet(SchemaDataModelOption dataModel)
в System.Data.Entity.Core.SchemaObjectModel.Schema.CreateXmlReaderSettings()
в System.Data.Entity.Core.SchemaObjectModel.Schema.Parse(XmlReader sourceReader, String sourceLocation)
в System.Data.Entity.Core.SchemaObjectModel.SchemaManager.ParseAndValidate(IEnumerable`1 xmlReaders, IEnumerable`1 sourceFilePaths, SchemaDataModelOption dataModel, AttributeValueNotification providerNotification, AttributeValueNotification providerManifestTokenNotification, ProviderManifestNeeded providerManifestNeeded, IList`1& schemaCollection)
в System.Data.Entity.Core.SchemaObjectModel.SchemaManager.ParseAndValidate(IEnumerable`1 xmlReaders, IEnumerable`1 sourceFilePaths, SchemaDataModelOption dataModel, DbProviderManifest providerManifest, IList`1& schemaCollection)
в System.Data.Entity.Core.SchemaObjectModel.SchemaManager.LoadProviderManifest(XmlReader xmlReader, String location, Boolean checkForSystemNamespace, Schema& schema)
в System.Data.Entity.Core.Common.DbXmlEnabledProviderManifest.Load(XmlReader reader)
в System.Data.Entity.Core.Common.DbXmlEnabledProviderManifest..ctor(XmlReader reader)
в System.Data.Entity.SqlServer.SqlProviderManifest..ctor(String manifestToken)
в System.Data.Entity.SqlServer.SqlProviderServices.GetDbProviderManifest(String versionHint)
в System.Data.Entity.Core.Common.DbProviderServices.GetProviderManifest(String manifestToken)
and it with inner exception:
System.Configuration.ConfigurationErrorException: Unknown configuration section userSettings. (C:\\Users\\Tema\\AppData\\Local\\Mgr\\Mgr.vshost.exe_Url_slqi2aqp0duilazpy21vojhl3ssnjluh\\1.0.0.0\\user.config line 3)
StackTrace:
в System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
в System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
в System.Configuration.ClientConfigurationSystem.OnConfigRemoved(Object sender, InternalConfigEventArgs e)
也许任何人都遇到过这个问题吗？谢谢。
我UserSettings'C刚刚删除的文件：\\ \\用户\\特马AppData的\\ \\本地经理\\ Mgr.vshost.exe_Url_slqi2aqp0duilazpy21vojhl3ssnjluh \ \ 1.0.0.0 \\ user.config' 它解决了我的问题 – Temaska