将输入保存到文本文件Metropapp

如果要将其保存到文件中,应使用 FileIO.WriteTextAsync :

StorageFolder folder = ApplicationData.Current.LocalFolder;
StorageFile file = await folder.CreateFileAsync("data.txt", CreationCollisionOption.ReplaceExisting);

if (file != null)
{
    await FileIO.WriteTextAsync(file, txtBox.Text);
}

为了稍后阅读, FileIO.ReadTextAsync :

StorageFolder folder = ApplicationData.Current.LocalFolder;
StorageFile file = await folder.GetFileAsync("data.txt");

if (file != null)
{
    string input = await FileIO.ReadTextAsync(file);
}