我无法访问配置文件中的值。
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
var clientsFilePath = config.AppSettings.Settings["ClientsFilePath"].Value;
// the second line gets a NullReferenceException
. config文件:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<!-- ... -->
<add key="ClientsFilePath" value="filepath"/>
<!-- ... -->
</appSettings>
</configuration>
你有什么建议我该怎么做吗?
当前回答
ConfigurationManager.RefreshSection("appSettings")
string value = System.Configuration.ConfigurationManager.AppSettings[key];
其他回答
对于web应用程序，我通常会写这个方法，只是用键调用它。
private String GetConfigValue(String key)
{
return System.Web.Configuration.WebConfigurationManager.AppSettings[key].ToString();
}
ConfigurationManager.RefreshSection("appSettings")
string value = System.Configuration.ConfigurationManager.AppSettings[key];
打开项目上的“属性” 进入“设置”选项卡 添加“名称”和“值”
代码将自动生成
<configuration> <configSections> <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup ..." ... > <section name="XX....Properties.Settings" type="System.Configuration.ClientSettingsSection ..." ... /> </sectionGroup> </configSections> <applicationSettings> <XX....Properties.Settings> <setting name="name" serializeAs="String"> <value>value</value> </setting> <setting name="name2" serializeAs="String"> <value>value2</value> </setting> </XX....Properties.Settings> </applicationSettings> </configuration>
得到一个值
Properties.Settings.Default.Name
OR
Properties.Settings.Default(“名称”)
我正在使用:
ExeConfigurationFileMap configMap = new ExeConfigurationFileMap();
//configMap.ExeConfigFilename = @"d:\test\justAConfigFile.config.whateverYouLikeExtension";
configMap.ExeConfigFilename = AppDomain.CurrentDomain.BaseDirectory + ServiceConstants.FILE_SETTING;
Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configMap, ConfigurationUserLevel.None);
value1 = System.Configuration.ConfigurationManager.AppSettings["NewKey0"];
value2 = config.AppSettings.Settings["NewKey0"].Value;
value3 = ConfigurationManager.AppSettings["NewKey0"];
其中value1 =…和value3 =…给出null和value2 =…作品
然后我决定用以下内容替换内部app.config:
// Note works in service but not in wpf
AppDomain.CurrentDomain.SetData("APP_CONFIG_FILE", @"d:\test\justAConfigFile.config.whateverYouLikeExtension");
ConfigurationManager.RefreshSection("appSettings");
string value = ConfigurationManager.AppSettings["NewKey0"];
使用VS2012 .net
这对我来说很管用:
string value = System.Configuration.ConfigurationManager.AppSettings[key];
