Develop a winrt app in Windows 8 and use other associated applications to open files

In winrt development, you can call other applications or desktop programs to open files. This is more functional than several launcher in the WP7 era.

The code is simple and clear:

Public void openfile (storagefile file, bool withpicker) {If (file! = NULL) {If (withpicker) {// select the open mode var Options = new launcheroptions {displayapplicationpicker = true}; options. UI. preferredplacement = placement. below; launcher. launchfileasync (file, options);} else {// use the default associated program to open launcher. launchfileasync (File );}}}

　　

Introduce the namespace using Windows. System to launcher;

 

Launcheroptions has the following attributes:

Contenttype: sets the file type for URLs on the network;

　　Displayapplicationpicker: whether to display the list of enabled methods;

　　Fallbackuri: when there is no corresponding opening method and no file type or Protocol application is processed, the user should jump to the URI value of the browser;

　　Preferredapplicationdisplayname:There is no corresponding opening method, and no application processing the file type or protocol, the name of the application installed by the user is displayed in the storage area;

　　Preferredapplicationpackagefamilyname:If no application processes the file type or protocol, the package series of the application you have installed in the storage area displays the value of the name;

　　Treatasuntrusted: whether to display a warning message to the user, so that the user can confirm to open it again;

　　Ui: the default Interface option when the application is started;

 

Note that the winrt app file system is not a traditional desktop file system (although it is a folder in a traditional desktop file system, but due to permission issues, it can be understood as an independent bucket similar to WP7). When we open a file in this way and modify the file with a third-party program, the modification will not perform any operations on the original file.

 

 

Jin YanyunMicro Blog http://www.weibo.com/jinyanyunHttp://www.cnblogs.com/vistach/archive/2012/10/18/Windows8_Win8_WinRT_MetroStyleApps_ModernUIApps_Launcher_LauncherOptions_OpenFile.html