「無法識別的配置節connectionStrings」。

Question

我一直在VS2005中使用本地連接訪問數據庫的項目。

在過去的一週中，我安裝了.NET Framework 3.5，以用於不同的項目以及VS6。

我回到我的VS2005的應用程序，突然有很大的問題：

在設計任何類利用我的OLEDB連接表明這一點：

Unable to cast object of type 'System.Configuration.DefaultSection' to type 'System.Configuration.ConnectionStringsSection'. Hide

at System.Configuration.Configuration.get_ConnectionStrings() at Microsoft.VisualStudio.Shell.Design.Serialization.ConfigurationHelperService.ReadConnectionStrings(String configFileName, DocData configDocData, String prefix) at Microsoft.VisualStudio.Editors.SettingsDesigner.AppConfigSerializer.Deserialize(DesignTimeSettings Settings, String SectionName, DocData AppConfigDocData, MergeValueMode mergeMode, IUIService UIService) at Microsoft.VisualStudio.Editors.SettingsGlobalObjects.SettingsFileGlobalObject.LoadSettings(String fileName) at Microsoft.VisualStudio.Editors.SettingsGlobalObjects.SettingsFileGlobalObject.BuildType() at Microsoft.VisualStudio.Editors.SettingsGlobalObjects.SettingsFileGlobalObject.GetObjectType() at Microsoft.VisualStudio.Shell.Design.GlobalType.get_ObjectType() at Microsoft.VisualStudio.Shell.Design.GlobalObject.GetHashCode() at Microsoft.VisualStudio.Shell.Design.GlobalObjectService.GlobalKey.GetHashCode() at System.Collections.Generic.ObjectEqualityComparer 1.GetHashCode(T obj) at System.Collections.Generic.Dictionary 2.FindEntry(TKey key) at Microsoft.VisualStudio.Shell.Design.GlobalObjectService.GetGlobalObjects(Type baseType) at Microsoft.VisualStudio.Shell.Design.GlobalObjectService.GetGlobalObjects() at Microsoft.VisualStudio.Design.Serialization.CodeDom.AggregateTypeResolutionService.GetTypeFromGlobalObjects(String name, Boolean throwOnError, Boolean ignoreCase) at Microsoft.VisualStudio.Design.Serialization.CodeDom.AggregateTypeResolutionService.GetType(String name, Boolean throwOnError, Boolean ignoreCase) at Microsoft.VisualStudio.Design.Serialization.CodeDom.AggregateTypeResolutionService.GetType(String name, Boolean throwOnError) at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.GetType(ITypeResolutionService trs, String name, Dictionary 2 names) at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.FillStatementTable(IDesignerSerializationManager manager, IDictionary table, Dictionary 2 names, CodeStatementCollection statements, String className) at System.ComponentModel.Design.Serialization.TypeCodeDomSerializer.Deserialize(IDesignerSerializationManager manager, CodeTypeDeclaration declaration) at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager manager) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.DeferredLoadHandler.Microsoft.VisualStudio.TextManager.Interop.IVsTextBufferDataEvents.OnLoadCompleted(Int32 fReload)

而當我跑的應用程序，我遇到以下異常啓動時：

"Unrecognized configuration section connectionStrings."

在網上找，這些問題似乎普遍涉及到建在VS2005的東西和部署.NET 1.1框架;但是這全部作爲VS本地內的Windows窗體應用程序運行（不在IIS上）。我試過卸載並重新安裝VS2K5無濟於事。

有什麼想法？ 謝謝， 馬特

Answer 1

這是胡亂猜測......但我想我的時候你有< configSections在你的web.config >元素之前，一些之前已經看到了這個。例如，這將導致一個錯誤：

<configuration> 
    <connectionStrings [...] /> 
    <configSections> 
    <sectionGroup name=[...] /> 
    </configSections> 
</configuration> 

的<configSections>元素需要是第一位的：

<configuration> 
    <configSections> 
    <sectionGroup name=[...] /> 
    </configSections> 
    <connectionStrings [...] /> 
</configuration> 

也許不是什麼導致你的問題，但我想我會提到它...

Answer 2

我一直面臨同樣的問題。請檢查您的machine.config文件。

<configuration> 
<system.windows.forms jitDebugging="true"/> 
<configSections> 
    <section name="appSettings" type="System.Configuration.AppSettingsSection, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" restartOnExternalChanges="false" requirePermission="false"/> 
    <section name="connectionStrings" type="System.Configuration.ConnectionStringsSection, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" requirePermission="false"/> 

，當我刪除了

..system.windows.forms jitDebugging="true"/>

再次工作得很好..

Answer 3

這是真的老了後，我知道，但我最近有同樣的問題，我有

<configSections> 
    <section name="appSettings" type="System.Configuration.AppSettingsSection, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" restartOnExternalChanges="false" requirePermission="false"/> 
    <section name="connectionStrings" type="System.Configuration.ConnectionStringsSection, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" requirePermission="false"/> 
<configSections> 

我的連接字符串之前：通過將固定它

<connectionStrings> 
     <add name="XXX" connectionString="Data Source=.;Initial Catalog=db;User Id=user;Password=pw;" providerName="System.Data.SqlClient"/> 
     </connectionStrings> 

所以我的app.config的樣子：

<?xml version="1.0" encoding="utf-8" ?> 
<configuration> 
    <configSections> 
     <section name="appSettings" type="System.Configuration.AppSettingsSection, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" restartOnExternalChanges="false" requirePermission="false"/> 
     <section name="connectionStrings" type="System.Configuration.ConnectionStringsSection, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" requirePermission="false"/> 
    <configSections> 
    <connectionStrings> 
     <add name="XXX" connectionString="Data Source=.;Initial Catalog=db;User Id=user;Password=pw;" providerName="System.Data.SqlClient"/> 
     </connectionStrings> 
</configuration> 

在C＃中，我使用下面的代碼來獲取我的連接字符串：

ConfigurationFileMap fileMap = new ConfigurationFileMap("myApp.config"); //Path to your config file 
Configuration configuration = ConfigurationManager.OpenMappedMachineConfiguration(fileMap); 
this.connectionString = configuration.ConnectionStrings.ConnectionStrings["XXX"].ConnectionString;