获取应用的设置和文件容器

使用  属性可以获取  对象中的设置。

注意：每个设置的名称最长可为 255 字符。每个设置的大小可以多达 8K 字节，而每个复合设置的大小可以多达 64K 字节。

 

使用 属性可以获取  对象中的文件。

 

 

下面是我封装的对应用数据操作的一个帮助类，主要围绕以上两个API:

public class AppDataHelper    {        #region 字段        /// 
        /// 获取应用的设置容器        /// 
        private static Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;        /// 
        /// 获取独立存储文件        /// 
        private static Windows.Storage.StorageFolder localFolder = Windows.Storage.ApplicationData.Current.LocalFolder;        #endregion        #region Set应用设置(简单设置，复合设置，容器中的设置)        /// 
        /// 简单设置        /// 
        ///         ///         public static void SetValue(string key, string value)        {            localSettings.Values[key] = value;        }        /// 
        /// 复合设置        /// 
        ///         public static void SetCompositeValue(Windows.Storage.ApplicationDataCompositeValue composite)        {            composite["intVal"] = 1;            composite["strVal"] = "string";            localSettings.Values["exampleCompositeSetting"] = composite;        }        /// 
        /// 创建设置容器        /// 
        ///         /// 
             private static Windows.Storage.ApplicationDataContainer CreateContainer(string containerName)        {            return localSettings.CreateContainer(containerName, Windows.Storage.ApplicationDataCreateDisposition.Always);        }        /// 
        /// 讲设置保存到设置容器        /// 
        ///         ///         ///         public static void SetContainerValue(string containerName, string key, string value)        {            if (!localSettings.Containers.ContainsKey(containerName))                CreateContainer(containerName);            localSettings.Containers[containerName].Values[key] = value;        }        #endregion        #region Get应用设置(简单设置，复合设置，容器中的设置)        /// 
        /// 获取应用设置        /// 
        ///         /// 
             public static object GetValue(string key)        {            return localSettings.Values[key];        }        /// 
        /// 获取复合设置        /// 
        ///         /// 
             public static Windows.Storage.ApplicationDataCompositeValue GetCompositeValue(string compositeKey)        {            // Composite setting            Windows.Storage.ApplicationDataCompositeValue composite =               (Windows.Storage.ApplicationDataCompositeValue)localSettings.Values[compositeKey];            return composite;        }        /// 
        /// 从设置容器中获取应用设置        /// 
        /// 
             public static object GetValueByContainer(string containerName, string key)        {            bool hasContainer = localSettings.Containers.ContainsKey(containerName);            if (hasContainer)            {                return localSettings.Containers[containerName].Values.ContainsKey(key);            }            return null;        }        #endregion        #region Remove已完成的设置        /// 
        /// 删除简单设置或复合设置        /// 
        ///         public static void Remove(string key)        {            localSettings.Values.Remove(key);        }        /// 
        /// 删除设置容器        /// 
        ///         public static void RemoveContainer(string containerName)        {            localSettings.DeleteContainer(containerName);        }        #endregion        #region 文件存储操作        /// 
        /// 写入文件        /// 
        public async void WriteTimestamp(string fileName,string contents)        {            try            {                Windows.Storage.StorageFile sampleFile = await localFolder.CreateFileAsync(fileName, Windows.Storage.CreationCollisionOption.ReplaceExisting);                await Windows.Storage.FileIO.WriteTextAsync(sampleFile, contents);            }            catch (Exception)            {                throw;            }                  }        /// 
        /// 读取文件        /// 
        public async Task
     
       ReadTimestamp(string fileName)        {            try            {                Windows.Storage.StorageFile sampleFile = await localFolder.GetFileAsync(fileName);                string contents = await Windows.Storage.FileIO.ReadTextAsync(sampleFile);                return contents;            }            catch (Exception)            {                return "read faild";            }        }        #endregion    }