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一、Application Data简介
Applicaion Data相当于桌面应用的注册表,存储一些用户配置信息,如运行时状态,用户喜好等,需要注意的时,当卸载应用时,这些数据会被删除,所以不要存储重要数据。
Applicaion Data即使在应用更新以后也不会丢失,有一个版本控制。
二、按用途分类
三、按存储方式分类
App settings
用这个静态属性来取得类类型的配置。
App Files
这个静态属性来取类型的文件。
四、代码示例
存储本地数据
ApplicationDataContainer localSettings = ApplicationData.Current.LocalSettings;//存储单一配置的句柄 ApplicationDataCompositeValue composite = new ApplicationDataCompositeValue();//存储多项配置句柄 StorageFolder localFolder = ApplicationData.Current.LocalFolder;//存储文件句柄localSettings.Values[ "exampleSetting"] = "Hello Windows";;//存储单一配置 composite[ "intVal"] = 1; composite[ "strVal"] = "string"; localSettings.Values[ "exampleCompositeSetting"] = composite;//存储多项配置
建立配置层级
ApplicationDataContainer container = localSettings.CreateContainer("exampleContainer", ApplicationDataCreateDisposition.Always);if (localSettings.Containers.ContainsKey("exampleContainer")){ localSettings.Containers["exampleContainer"].Values["exampleSetting"] = "Hello Windows";}
读取配置
Object value = localSettings.Values["exampleSetting"];//a settingApplicationDataCompositeValue composite = (ApplicationDataCompositeValue)localSettings.Values["exampleCompositeSetting"];if (composite == null){ // No data}else{ // Access data in composite["intVal"] and composite["strVal"]}bool hasContainer = localSettings.Containers.ContainsKey("exampleContainer");bool hasSetting = false;if (hasContainer){ hasSetting = localSettings.Containers["exampleContainer"].Values.ContainsKey("exampleSetting");}
删除配置
localSettings.Values.Remove("exampleSetting");//ApplicationDataContainerSettings.Remove localSettings.Values.Remove("exampleCompositeSetting");//ApplicationDataCompositeValue.Remove localSettings.DeleteContainer("exampleContainer");//ApplicationDataContainer.DeleteContainer
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