不允许对IsolatedStorageFile Stream 进行操作

创建文件后打开该文件时出现错误

using (var myFileStore = IsolatedStorageFile.GetUserStoreForApplication())
        {
            myFileStore.CreateFile(DateTime.Now.Ticks + ".txt");
        }
using (var myFileStore = IsolatedStorageFile.GetUserStoreForApplication())
        {
            temp = myFileStore.GetFileNames();
            for (int k = 0; k < temp.Length; k++)
            {
                IsolatedStorageFileStream file1 = myFileStore.OpenFile(temp[k], FileMode.Open, FileAccess.Read);
                dataSource.Add(new SampleData() { Name = temp[k], Size = Convert.ToString(Math.Round(Convert.ToDouble(file1.Length) / 1024 / 1024, 1) + " MB") });
            }
        }

这是因为您没有关闭返回的流CreateFile method!

您的代码应如下所示：

using (var myFileStore = IsolatedStorageFile.GetUserStoreForApplication())
{
    myFileStore.CreateFile(DateTime.Now.Ticks + ".txt").Dispose();
}

or

using (var myFileStore = IsolatedStorageFile.GetUserStoreForApplication())
{
    using(myFileStore.CreateFile(DateTime.Now.Ticks + ".txt"))
    {
    }
}

下面的 OpenFile 也是如此。

底线你应该always处置您的流（通过使用using条款或Dispose() method)