private async void LoadAccessListAsync()
{
if (await ApplicationData.Current.LocalFolder.TryGetItemAsync(AccessFileName) is StorageFile jsonFile)
{
// 文件存在,读取其内容
StreamReader sr = new StreamReader(await jsonFile.OpenStreamForReadAsync());
var jsonString = await sr.ReadToEndAsync();
_rootObject = FJSONHelper.DataContractJSONDeSerizlizer <MRootAccessObject>(jsonString);
if (_rootObject.groupList is null)
{
_rootObject.groupList = new List <MPathAccessGroup>();
}
}
else
{
// 这个文件还不存在,初始化类的相关属性为空
_rootObject = new MRootAccessObject()
{
groupList = new List <MPathAccessGroup>(),
devicesList = new List <MDeviceAccessItem>(),
LastLocation = null
};
}
}
private async void WriteToAccessFileAsync()
{
var jsonFile = await ApplicationData.Current.LocalFolder.CreateFileAsync(AccessFileName, CreationCollisionOption.ReplaceExisting);
FJSONHelper.ToJSONDataAsync(_rootObject, jsonFile);
}