Question

我有一个下一个App.config文件：

<configuration>
  <configSections>
    <sectionGroup name="UserSettingsGroup">
        <section name="dbConnectionString" type="System.Configuration.ConnectionStringsSection" />
        <section name="reportsFolderSettings" type="System.Configuration.DictionarySectionHandler" /> 
    </sectionGroup>
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
  </startup>
  <UserSettingsGroup>
    <dbConnectionString>
      <add name="Host" providerName="System.Data.sqlclient" connectionString="localhost" />
      <add name="Port" providerName="System.Data.sqlclient" connectionString="3050" />
      ........ 
      ........ etc.    
    </dbConnectionString>
    <reportsFolderSettings>
        <add key="ReportsFolder" value="C:\" /> 
    </reportsFolderSettings>
  </UserSettingsGroup>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
  </startup>
  <system.data>
    <DbProviderFactories>
        <remove invariant="FirebirdSql.Data.FirebirdClient" />
        <add name="FirebirdClient Data Provider" invariant="FirebirdSql.Data.FirebirdClient" description=".NET Framework Data Provider for Firebird" type="FirebirdSql.Data.FirebirdClient.FirebirdClientFactory, FirebirdSql.Data.FirebirdClient" />
    </DbProviderFactories>
  </system.data>

然后我在我的应用程序设置中对运行时进行了一些更改（我已更改了连接字符串和保存应用程序报告的路径），为了应用它们，我使用了以下代码：

private void SaveSettings() {

  ExeConfigurationFileMap configMap = new ExeConfigurationFileMap();
  Configuration config = ConfigurationManager.OpenExeConfiguration(System.Reflection.Assembly.GetEntryAssembly().Location);
  ConnectionStringsSection connectionSettings =     (ConnectionStringsSection)config.SectionGroups.Get("UserSettingsGroup").Sections.Get("dbConnectionString");

  connectionSettings.ConnectionStrings["Host"].ConnectionString = txtServer.Text;
  connectionSettings.ConnectionStrings["Port"].ConnectionString = txtPort.Text;
  connectionSettings.ConnectionStrings["DbPath"].ConnectionString = txtDBPath.Text;
  connectionSettings.ConnectionStrings["User"].ConnectionString = txtUser.Text;
  connectionSettings.ConnectionStrings["Password"].ConnectionString = txtPassword.Text;
  connectionSettings.ConnectionStrings["Charset"].ConnectionString = cboCharset.Text;

  Hashtable sectionReportsFolder = ConfigurationManager.GetSection(config.SectionGroups.Get("UserSettingsGroup").Sections.

  Get("reportsFolderSettings").SectionInformation.SectionName) as Hashtable;

  sectionReportsFolder.Clear();
  sectionReportsFolder.Add("ReportsFolder", tbo_reportfolder.Text);

  config.Save(ConfigurationSaveMode.Modified);
  ConfigurationManager.RefreshSection("dbConnectionString");
  ConfigurationManager.RefreshSection("reportsFolder");      
}

乍一看，一切运作良好 - 我在应用程序运行时看到了更改但由于某种原因，应用程序无法保存＆＃34; reportsFolderSettings＆＃34;重新启动后，我只看到默认值＆＃34; C：\＆＃34;。

P.S我从。＆＃34; \ bin \ release＆＃34;启动.exe中的应用程序文件夹，不是来自Visual Studio。

Answer 1

好的，我重新创建了你的问题，我遇到了同样的问题; ）

问题是DictionarySectionHandler仅支持读取值

这不是你问题的直接答案，但它有效

工作我这样做：

我改变了部分的类型：

 <section name="reportsFolderSettings" type="System.Configuration.DictionarySectionHandler" />

使用AppSettingsSection

 <section name="reportsFolderSettings" type="System.Configuration.AppSettingsSection" />

然后我改变了：

        var sectionReportsFolder = config.SectionGroups["UserSettingsGroup"].Sections["reportsFolderSettings"] as AppSettingsSection;

        sectionReportsFolder.Settings.Clear();

        sectionReportsFolder.Settings.Add("ReportsFolder", tbo_reportfolder.Text);

然后一切都很好。我测试了这个。

应用程序重新启动后，App.config不会保存一些更改

1 个答案: