Windows 8应用漫游使用自定义类存储 [英] windows 8 app roaming storage with custom class

问题描述

我学习用的C＃Windows 8编程。 // MSDN：我经历了很多教程（如 HTTP工作。 microsoft.com/en-us/library/windows/apps/hh986968.aspx ）的过程中，我试图创建一个显示数据存储的简单的应用程序。所有的我已经能够找到店里只有简单的字符串存储漫游的例子。是否有存储更复杂的数据有什么办法？

I am learning programming in windows 8 with c#. I have worked through many tutorials (such as http://msdn.microsoft.com/en-us/library/windows/apps/hh986968.aspx) in the process and I am attempting to create a simple app showing data storage. All of the examples I have been able to find store only simple strings in roaming storage. Is there a way to store more complex data there?

例如：一个基本的类人用一个姓名和年龄的名单。我试图做到这一点的：

example: a List of a basic class Person with a name and age. I attempted to do it as:

保存数据：

roamingSettings.Values [peopleList] =人;

roamingSettings.Values["peopleList"] = people;

加载数据：

人=（列表）roamingSettings.Values [peopleList];

people = (List)roamingSettings.Values["peopleList"];

WinRT的信息：试图序列的值错误被写入应用程序数据存储。
保存数据时出现错误这种类型的数据不支持

WinRT information: Error trying to serialize the value to be written to the application data store. when saving the data I get the error "Data of this type is not supported"

所以，也许你可以保存为字符串值 - 但我还没有看到，无论是在任何地方指定。

So, maybe all you can save is string values -- but I have not seen that specified anywhere either.

推荐答案

是的，你可以保存你的价值观，以raoming数据的集合。你的问题的解决方案是
ApplicationDataCompositeValue类

Yes, you can save your values to raoming data as a collection. The solution for your problem is ApplicationDataCompositeValue class

请参阅 http://msdn.microsoft.com/en-us/library/windows/apps/ windows.storage.applicationdatacompositevalue.aspx 了解详情

正如你所说，你是C＃开发，下面是你的问题
代码我想象，你有一个Person类有两个成员

As you mentioned, You are developing in C# , following is the code for your problem I imagined, you have a Person class with two members

class person
{
int PersonID;
string PersonName
}

现在，阅读和这个类写入值，这里是代码

Now, to read and write values for this class, here is the code

首先在窗口类的构造函数，在InitializeComponent（下）;,创建漫游设置

First in the constructor of your Window class, under the InitializeComponent();, create an object of roaming settings

Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.RoamingSettings;

要写入的组合，使用下面的代码

To Write to a composition, use the following code

void write (Person Peopleobj)
{
Windows.Storage.ApplicationDataCompositeValue composite = new Windows.Storage.ApplicationDataCompositeValue();
composite["PersonID"] = Peopleobj.PersonID;
composite["PersonName"] = Peopleobj.PersonName;
roamingSettings.Values["classperson"] = composite;
}

要读懂一个人的对象，请使用以下代码

To Read a Person object, use the following code

void DisplayOutput()
    {
        ApplicationDataCompositeValue composite = (ApplicationDataCompositeValue)roamingSettings.Values["classperson"];

        if (composite == null)
        {
            // "Composite Setting: <empty>";
        }
        else
        {
        Peopleobj.PersonID = composite["PersonID"] ;
        Peopleobj.PersonName = composite["PersonName"];

        }

         }

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