StoreContext.RequestDownloadAndInstallStorePackageUpdatesAsync Method
Definition
Important
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Attempts to download and install the specified package updates for the current app from the Microsoft Store. This method also displays a UI dialog that requests permission for the operation.
Important
This method must be called on the UI thread.
public:
virtual IAsyncOperationWithProgress<StorePackageUpdateResult ^, StorePackageUpdateStatus> ^ RequestDownloadAndInstallStorePackageUpdatesAsync(IIterable<StorePackageUpdate ^> ^ storePackageUpdates) = RequestDownloadAndInstallStorePackageUpdatesAsync;/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperationWithProgress<StorePackageUpdateResult, StorePackageUpdateStatus> RequestDownloadAndInstallStorePackageUpdatesAsync(IIterable<StorePackageUpdate> const& storePackageUpdates);[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperationWithProgress<StorePackageUpdateResult,StorePackageUpdateStatus> RequestDownloadAndInstallStorePackageUpdatesAsync(IEnumerable<StorePackageUpdate> storePackageUpdates);function requestDownloadAndInstallStorePackageUpdatesAsync(storePackageUpdates)Public Function RequestDownloadAndInstallStorePackageUpdatesAsync (storePackageUpdates As IEnumerable(Of StorePackageUpdate)) As IAsyncOperationWithProgress(Of StorePackageUpdateResult, StorePackageUpdateStatus)Parameters
- storePackageUpdates
The set of StorePackageUpdate objects that represent the updated packages to download and install.
Returns
An object that the caller can observe to track progress and completion for the operation. On successful completion, the result is a StorePackageUpdateResult object that provides info about the package updates.
- Attributes
Exceptions
If the ErrorCode property of the exception has the value 0x80070578 (ERROR_INVALID_WINDOW_HANDLE), this indicates that the method was not called on the UI thread. If you are calling this method in a desktop application that uses the Desktop Bridge, this can also indicate that you did not configure the <xref href="Windows.Services.Store.StoreContext?text=StoreContext" /> object to specify which application window is the owner window for modal dialogs shown by this method. For more information, see this article.
Remarks
To get the list of packages that have updates available, use the GetAppAndOptionalStorePackageUpdatesAsync method. If you have already downloaded package updates by using RequestDownloadStorePackageUpdatesAsync, this method will install the updates without trying to download them again. For more information about using this method, including a code example, see Download and install package updates for your app.
This operation will not block. The IAsyncOperationWithProgress object returned by this method will complete after the update packages are downloaded and installed.
When you call this method, the OS displays the following UI:
The OS displays a dialog that tells the user that an app update is available to download and asks the user's permission to proceed with the download. If the user does not grant permission to start the download, the OverallState property of the StorePackageUpdateResult return value has the value Canceled.
After the updated packages are downloaded, the OS displays another dialog that tells the user that the app update is waiting to be installed and asks the user's permission to proceed with the installation. This dialog warns the user that the app might need to restart. If the user does not grant permission to start the installation, the OverallState property of the StorePackageUpdateResult return value has the value Canceled.
Display progress info for the download and install
The method that you assign to handle Progress notifications is called one time for each step in the download and installation process for each package in this request. The Progress handler receives a StorePackageUpdateStatus argument that provides info about the update package that raised the progress notification.
If you want to show a custom progress UI (such as a ProgressBar) that provides status to the user, you can use the PackageDownloadProgress field of the StorePackageUpdateStatus argument to get the current progress of each package download and install operation, represented by a value from 0.0 to 1.0. This value increases from 0.0 to 0.8 during the download, and then it increases from 0.8 to 1.0 during the install.
Therefore, if you map the percentage shown in your custom progress UI directly to the value of the PackageDownloadProgress field, be aware that your UI will show 80% when the package is finished downloading and the OS displays the installation dialog. If you want your custom progress UI to display 100% when the package is downloaded and ready to be installed, you can modify your code to assign 100% to your progress UI when the PackageDownloadProgress field reaches 0.8.