Question

以下代码适用于Windows XP和Windows 7：

var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
config.AppSettings.Settings.Remove(key);
config.AppSettings.Settings.Add(key, value);
config.Save(ConfigurationSaveMode.Modified); // fails here

但它导致Windows 8上出现“拒绝访问路径”错误。我尝试将ConfigurationUserLevel更改为PerUserRoamingAndLocal，但它没有做任何事情。

为了能够在Windows 8中更新App.Config（或者特别是[application_name] .exe.config，我需要做什么？

我应该补充一点，尝试运行该应用的用户具有默认的Windows 8权限。我不确切知道那是什么，但它很低。是否需要提升才能使其正常工作？

修改记录的错误：

<Message>Access to the path 'C:\ProgramData\Path\AppName.exe.config' is denied.</Message> <StackTrace> at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share) at System.Configuration.Internal.WriteFileContext.ValidateWriteAccess(String filename) at System.Configuration.Internal.WriteFileContext.Complete(String filename, Boolean success) at System.Configuration.Internal.InternalConfigHost.StaticWriteCompleted(String streamName, Boolean success, Object writeContext, Boolean assertPermissions) at System.Configuration.Internal.InternalConfigHost.System.Configuration.Internal.IInternalConfigHost.WriteCompleted(String streamName, Boolean success, Object writeContext, Boolean assertPermissions) at System.Configuration.Internal.InternalConfigHost.System.Configuration.Internal.IInternalConfigHost.WriteCompleted(String streamName, Boolean success, Object writeContext) at System.Configuration.Internal.DelegatingConfigHost.WriteCompleted(String streamName, Boolean success, Object writeContext) at System.Configuration.UpdateConfigHost.WriteCompleted(String streamName, Boolean success, Object writeContext) at System.Configuration.MgmtConfigurationRecord.SaveAs(String filename, ConfigurationSaveMode saveMode, Boolean forceUpdateAll) at System.Configuration.Configuration.SaveAsImpl(String filename, ConfigurationSaveMode saveMode, Boolean forceSaveAll) at System.Configuration.Configuration.Save(ConfigurationSaveMode saveMode) at MyNamespace.Infrastructure.ConfigurationManager.WriteToAppSettings(String key, String value) in C:\Path\To\App\AppName\Infrastructure\ConfigurationManager.cs:line 76 </StackTrace>

Answer 1

您可以发布异常消息吗？

我刚刚在Win 8 Pro，VS 2012上测试了你的代码，它运行良好。

var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
config.AppSettings.Settings.Remove("my_new_key");
config.AppSettings.Settings.Add("my_new_key", "my new value");
config.Save(ConfigurationSaveMode.Modified);

产生

的配置文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <appSettings>
        <add key="my_new_key" value="my new value" />
    </appSettings>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
</configuration>

至于需要提升权限，它取决于运行应用程序的用户以及配置文件所在的文件/目录的权限设置。

如果使用默认项目位置％homepath％\ documents \ visual studio 2012 \ projects \，则无需使用提升的权限运行应用程序即可编辑exe.config文件。

如果您的文件位于其他任何位置，那么您必须查看该文件的权限（右键单击 - ＆gt;属性 - >安全选项卡）..并查看用户是否正在运行该应用程序（可能您的帐户）具有写权限。

这是对NTFS文件权限的一个很好的解释。 http://www.techrepublic.com/article/windows-101-know-the-basics-about-ntfs-permissions/6084446

Answer 2

尝试此操作以删除密钥：

Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

AppSettingsSection appSettings = (AppSettingsSection)config.GetSection("appSettings");
appSettings.Settings.Remove("ConnectionString");
appSettings.Settings.Add("ConnectionString", "");

config.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection(config.AppSettings.SectionInformation.Name);

或更改键值：

Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
KeyValueConfigurationCollection settings = config.AppSettings.Settings;

settings["KeyName"].Value = "newkeyvalue";

config.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection(config.AppSettings.SectionInformation.Name);

在Windows 8上访问App.Config拒绝的路径。如何更新App.Config？

2 个答案: