如何在Xamarin Forms应用程序本地保存一些用户数据? [英] How can I save some user data locally on my Xamarin Forms app?
问题描述
我有一个简单的Xamarin Forms应用程序.现在，我有了一个简单的POCO对象(例如User实例或最新推文或订单的列表等).
I have a simple Xamarin Forms app. I've now got a simple POCO object (eg. User instance or an list of the most recent tweets or orders or whatever).
如何将该对象本地存储到设备?假设我将其序列化为JSON.
How can I store this object locally to the device? Lets imagine I serialize it as JSON.
此外，此数据的安全性如何?它是钥匙串等的一部分吗?自动备份?
Also, how secure is this data? Is it part of Keychains, etc? Auto backed up?
欢呼！
推荐答案
您有两种选择.
- SQLite.此选项是跨平台的，如果您有大量数据，则效果很好.您还将获得额外的交易支持和异步支持. 编辑:过去，我建议使用 SQLite.Net-PCL .由于问题涉及到Android 7.0支持(并且显然不再支持)我现在建议使用最初来自以下项目的项目: sqlite-net
- 本地存储.有一个很棒的支持跨平台存储的小工具.有关更多信息，请参见 PCLStorage
- 还有 Application.Current.Properties 在Xamarin.Forms中实现，允许简单的键值对数据.
- SQLite. This option is cross-platform and works well if you have a lot of data. You get the added bonus of transaction support and async support as well. EDIT: In the past I suggested using SQLite.Net-PCL. Due to issues involving Android 7.0 support (and an apparent sunsetting of support) I now recommend making use of the project that was originally forked from: sqlite-net
- Local storage. There's a great nuget that supports cross-platform storage. For more information see PCLStorage
- There's also Application.Current.Properties implemented in Xamarin.Forms that allow simple Key-Value pairs of data.
我认为您必须进行调查，找出哪种路线最能满足您的需求.
I think you'll have to investigate and find out which route serves your needs best.
就安全性而言，这取决于将数据放置在每台设备上的位置. Android默认将应用程序数据存储在安全的应用程序文件夹中(如果您是root用户，则不是所有安全的文件夹). iOS具有多个不同的文件夹，用于根据不同的需求进行数据存储.在此处了解更多信息: iOS数据存储
As far as security, that depends on where you put your data on each device. Android stores app data in a secure app folder by default (not all that secure if you're rooted). iOS has several different folders for data storage based on different needs. Read more here: iOS Data Storage
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