我正在开发带有.NET Framework 4.6.1的C#WPF MVVM应用程序,并且我在app.config中有一个自定义部分:
<configuration>
<configSections>
<section name="SpeedSection" type="System.Configuration.NameValueSectionHandler" />
</configSections>
<SpeedSection>
<add key="PrinterSpeed" value="150" />
<add key="CameraSpeed" value="150" />
</SpeedSection>
</configuration>
我想从我的应用中修改PrinterSpeed
和CameraSpeed
。我尝试了此代码:
static void AddUpdateAppSettings(string key, string value)
{
try
{
var configFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
var settings = configFile.AppSettings.Settings;
if (settings[key] == null)
{
settings.Add(key, value);
}
else
{
settings[key].Value = value;
}
configFile.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection(configFile.AppSettings.SectionInformation.Name);
}
catch (ConfigurationErrorsException)
{
Console.WriteLine("Error writing app settings");
}
}
但是它不起作用,因为我没有修改AppSettings
节。
如何修改这些值?
System.Configuration.NameValueSectionHandler
很难使用。您可以用System.Configuration.AppSettingsSection
替换它而无需触摸其他任何内容:
<configuration>
<configSections>
<section name="SpeedSection" type="System.Configuration.AppSettingsSection" />
</configSections>
<SpeedSection>
<add key="PrinterSpeed" value="150" />
<add key="CameraSpeed" value="150" />
</SpeedSection>
</configuration>
,然后更改您的方法如下:
static void AddUpdateAppSettings(string key, string value)
{
try
{
var configFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
var settings = ((AppSettingsSection) configFile.GetSection("SpeedSection")).Settings;
if (settings[key] == null)
{
settings.Add(key, value);
}
else
{
settings[key].Value = value;
}
configFile.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection(configFile.AppSettings.SectionInformation.Name);
}
catch (ConfigurationErrorsException)
{
Console.WriteLine("Error writing app settings");
}
}
您应该使用configurationsection类。本教程可以帮助:https://msdn.microsoft.com/en-us/library/2tw134k3.aspx