| public IncreaseQuotaTo ( long newQuotaSize ) : bool | ||
| newQuotaSize | long | |
| 리턴 | bool | |
/// <summary>
/// 申请500M的存储空间
/// </summary>
/// <returns></returns>
public static bool IncreaseQuotaTo()
{
//如果本函数代码断点调试将不能正常执行。申请缓存对话框将不能阻塞。
long StorageSpace = 200 * 1024 * 1024; //申请空间大小
long IncreaseSpace = 100 * 1024 * 1024; //增量空间
long MinAvailableFreeSpace = 10 * 1024 * 1024; //最小可用空间
try
{
lock (lockStorageObject)
{
using (System.IO.IsolatedStorage.IsolatedStorageFile file = System.IO.IsolatedStorage.IsolatedStorageFile.GetUserStoreForSite())
{
if (file.Quota < StorageSpace)
{
return(file.IncreaseQuotaTo(StorageSpace));
}
else if (file.AvailableFreeSpace < MinAvailableFreeSpace)
{
return(file.IncreaseQuotaTo(file.Quota + IncreaseSpace));
}
}
}
return(true);
}
catch (System.IO.IsolatedStorage.IsolatedStorageException)
{
return(false);
}
}
/// <summary>
/// Performs an increase in space for saving files in Isolated Storage
/// </summary>
/// <param name="iso"></param>
/// <param name="requiredSpace">The required space of a a file in bytes</param>
/// <returns></returns>
public static IsolatedStorageIncreaseRespond IncreaseIsoStorage(this IsolatedStorageFile iso, long requiredSpace)
{
IsolatedStorageIncreaseRespond respond;
DebugManager.LogData("Requesting an increase in Isolated Storage: +" + string.Format("{0:#,###0}", requiredSpace));
if (iso.IsEnoughSpaceInIsoStorage(requiredSpace))
{
DebugManager.LogTrace("Request for increase in Isolated Storage is not needed.");
respond = IsolatedStorageIncreaseRespond.NotNeeded;
}
else
{
// request more space for Isolated Storage
if (!iso.IncreaseQuotaTo(iso.Quota + requiredSpace))
{
DebugManager.LogTrace("Request for increase in Isolated Storage has been declined by the user.");
respond = IsolatedStorageIncreaseRespond.Declined;
}
else
{
DebugManager.LogTrace("Request for increase in Isolated Storage has been accepted by the user.");
respond = IsolatedStorageIncreaseRespond.Accepted;
}
}
return(respond);
}
public AssemblyStorageService()
{
Store = IsolatedStorageFile.GetUserStoreForApplication();
Store.IncreaseQuotaTo(20971520);
if (!Store.DirectoryExists("Modules"))
Store.CreateDirectory("Modules");
}
private bool CheckIfEnoughSpaceLeft(IsolatedStorageFile store, long size)
{
bool enoughSpaceLeft = false;
var handle = new ManualResetEvent(false);
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
try
{
// Request size.
Int64 spaceRequired = size;
Int64 available = store.AvailableFreeSpace;
// If available space is less than
// what is requested, try to increase.
if (available < spaceRequired)
{
spaceRequired = spaceRequired - available;
// Request more quota space.
if (!store.IncreaseQuotaTo(store.Quota + spaceRequired + 1))
{
// The user clicked NO to the
// host's prompt to approve the quota increase.
enoughSpaceLeft = false;
}
else
{
// The user clicked YES to the
// host's prompt to approve the quota increase.
enoughSpaceLeft = true;
}
}
enoughSpaceLeft = true;
}
catch (Exception)
{
// Handle that store could not be accessed.
enoughSpaceLeft = false;
}
if (!enoughSpaceLeft)
{
this.DialogViewService.MessageBoxOk(NewDownload.DownloadRequirementsFailed, string.Format(NewDownload.NotEnoughFreeSpace, this.Tag));
}
handle.Set();
});
handle.WaitOne();
return enoughSpaceLeft;
}
