Question

我正在尝试存储一个文件夹列表，以便以后可以访问它们。（我之前已将它们添加到FutureAccessList）

List<StorageFolder> folders = new List<StorageFolder>();
Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
// ...
Windows.Storage.ApplicationDataCompositeValue data = new Windows.Storage.ApplicationDataCompositeValue();
foreach (var item in folders)
{
    if (item.Path == null || item.Path == "")
        continue;
    data[item.FolderRelativeId] = item.Path; // this is the line where I get the exception
 }
 localSettings.Values["folders"] = data;

我不明白为什么我一直收到这个错误：

An exception of type 'System.Exception' occurred in mscorlib.dll but was not handled in user code

WinRT information: Error trying to write setting in application data composite value

有人可以帮助我吗？

Answer 1

不需要ApplicationDataCompositeValue。

foreach (AccessListEntry entry in StorageApplicationPermissions.FutureAccessList.Entries)
{
    StorageFolder folder = await StorageApplicationPermissions.FutureAccessList.GetFolderAsync(entry.Token);
}

Answer 2

我最终设法让它发挥作用：

我增加了一个变量并使这个变量成为DataCompositeValue的键...... item.FolderRelativeId似乎有一些特殊/禁止的字符。

List<StorageFolder> folders = new List<StorageFolder>();
Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
// ...
Windows.Storage.ApplicationDataCompositeValue data = new Windows.Storage.ApplicationDataCompositeValue();
var i = 0;
foreach (var item in folders)
{
    if (item.Path == null || item.Path == "")
        continue;
    data[i.ToString()] = item.Path; // this is the line where I get the exception
    i = i + 1;
}
localSettings.Values["folders"] = data;

将文件夹添加到ApplicationDataCompositeValue

2 个答案: