Application and Deployment ClickOnce Interview Questions & FAQs

40. Application and Deployment ClickOnce

40.1 How does ClickOnce deployment work ?

ClickOnce allows you to deploy windows based applications to a client system using the web or file server. The application files are placed on the web or FTP site or local share and the user is provided with a link in case of web and FTP deployment. On clicking the link, the application files get downloaded and installed. When a new version or update is available, it can be automatically detected and applied to the clients using the optional deployment settings. In case of a local share deployment, the application can be installed similar to other windows based applications.

40.2 Can I add prerequisites in my ClickOnce deployment ?

Grids are useful in localizable applications to create controls that adjust to fit content. In the below example, the Grid element's "IsSharedSizeScope" attached property is useful for sharing the same sizing among multiple grid elements.

40.3 How do I enable automatic updates for my application using ClickOnce deployment ?

ClickOnce allows the vendors to provide regular updates for the applications. To enable automatic updates, select "publish" tab in Project Properties window and click on the "updates" button. In the Application Updates window, select the mode of application updates like 'after application starts' and 'before application starts'. The former mode is used when there is a need to provide regular updates of the application after a period of time and in the later mode, the application checks for the updates only once, that is when the application runs for the first time. Click OK to close the Application Updates window and publish the application.