[SSMS][Visual Studio] 解決 - Unable to find the requested .Net Framework Data Provider. It may not be installed

問題狀況

@VS2013

開啟 SSDT 連資料庫時，跳出了以下訊息

@SSMS

編輯 Table 時出現例外，如下圖：

詳細訊息如下：

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Exception has been thrown by the target of an invocation. (SQLEditors)

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Program Location:

at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) 
   at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) 
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) 
   at System.Activator.CreateInstance[T]() 
   at Microsoft.SqlServer.Management.DataTools.Providers.Common.CommonConnectionProperties`1..ctor() 
   at Microsoft.SqlServer.Management.DataTools.Providers.Common.CommonProviderObjectFactory`3.CreateObject(Type objType) 
   at Microsoft.SqlServer.Management.DataTools.Providers.SqlServer.SqlProviderObjectFactory.CreateObject(Type objType) 
   at Microsoft.SqlServer.Management.DataTools.DataServices.DataProvider.CreateObject(Guid dataSource, Type objType) 
   at Microsoft.SqlServer.Management.DataTools.DataServices.DataProvider.CreateConnectionProperties(Guid dataSource) 
   at Microsoft.SqlServer.Management.DataTools.DataServices.DataProviderManager.CreateConnectionProperties(Guid provider) 
   at Microsoft.SqlServer.Management.DataTools.Providers.SqlServer.SqlDataSourceSpecializer.DeriveDataSource(String connectionString) 
   at Microsoft.SqlServer.Management.DataTools.DataServices.DataProvider.DeriveDataSource(String connectionString) 
   at Microsoft.SqlServer.Management.DataTools.DataServices.DataConnection.SetConnectionStrings(String connectionString) 
   at Microsoft.SqlServer.Management.DataTools.DataServices.DataConnection..ctor(DataProvider provider, String connectionString, Boolean encryptedString) 
   at Microsoft.SqlServer.Management.DataTools.DataServices.DataConnectionFactory.CreateDataConnectionImpl(Guid provider, String connectionString, Boolean encryptedString) 
   at Microsoft.SqlServer.Management.Data.DataConnectionFactory.CreateDataConnection(Guid provider, String connectionString, Boolean encryptedString) 
   at Microsoft.SqlServer.Management.DataTools.DataServices.DataConnectionManager.CreateDataConnection(Guid provider, String connectionString, Boolean encryptedString) 
   at Microsoft.SqlServer.Management.Data.DataConnectionManager.GetDataConnection(Guid provider, String connectionString, Boolean encryptedString, Boolean update) 
   at Microsoft.SqlServer.Management.DataTools.DataServices.DataConnectionManager.Microsoft.SqlServer.Management.Data.Interop.IVsDataConnectionManager.GetDataConnection(Guid& guidProvider, String bstrConnectionString, Boolean fEncryptedString) 
   at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VsDataDesignerNode.CreateDesigner() 
   at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VsDataDesignerNode.Open() 
   at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VirtualProject.CreateDesigner(Urn origUrn, DocumentType editorType, DocumentOptions aeOptions, IManagedConnection con, String fileName) 
   at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VirtualProject.Microsoft.SqlServer.Management.UI.VSIntegration.Editors.ISqlVirtualProject.CreateDesigner(Urn origUrn, DocumentType editorType, DocumentOptions aeOptions, IManagedConnection con, String fileName) 
   at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.ISqlVirtualProject.CreateDesigner(Urn origUrn, DocumentType editorType, DocumentOptions aeOptions, IManagedConnection con, String fileName) 
   at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VsDocumentMenuItem.CreateDesignerWindow(IManagedConnection mc, DocumentOptions options)

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Unable to find the requested .Net Framework Data Provider.  It may not be installed. (System.Data)

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Program Location:

at System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName) 
   at Microsoft.SqlServer.Management.ConnectionUI.AdoDotNetConnectionProperties..ctor(String providerName) 
   at Microsoft.SqlServer.Management.ConnectionUI.SqlConnectionProperties..ctor()

找 .NET Framework 的 Machine.config

C:\Windows\Microsoft.NET\Framework\v4.0.30319\CONFIG\Machine.config

C:\Windows\Microsoft.NET\Framework\v2.0.50727\CONFIG\Machine.config

用管理員權限開啟 Machine.config ，搜尋關鍵字 DbProviderFactories，確認是否有多餘的 DbProviderFactories，然後刪掉它，存檔

再次開啟 SSMS、VS2013 SSDT 就恢復正常。

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