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ClickOnce applications can be associated with one or more file name extensions, so that the application will be started automatically when the user opens a file of those types. Adding file name extension support to a ClickOnce application is straightforward. Find the assembly element. For more information, see ClickOnce application manifest. As a child of the assembly element, add a fileAssociation element.

The fileAssociation element has four attributes:. The icon must be added as a file resource in the application manifest. If you want to associate more than one file type with the application, add additional fileAssociation elements. Note that the progid attribute should be different for each.

Once you have finished with the application manifest, re-sign the manifest. You can do this from the command line by using Mage. For more information, see Mage.

Submit and view feedback for. Skip to main content. Exit focus mode. To create file associations for a ClickOnce application Create a ClickOnce application normally, or use your existing ClickOnce application. Open the application manifest with a text or XML editor, such as Notepad. The fileAssociation element has four attributes: extension : The file name extension you want to associate with the application. Yes No. Any additional feedback?

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How to: Create file associations for a ClickOnce application

As we rebuild Microsoft Edge atop the Chromium open-source platform, we are working through various scenarios that behave differently in the new browser. One example of a behavioral gap is related to running ClickOnce apps. See the end of this post. ClickOnce is a Microsoft application deployment framework that aims to allow installation of native-code applications from the web in around one click. Installation prompt when opening an. Such files launch correctly from Internet Explorer and pre-Chromium Edge, but fail in Firefox and Chrome with an error message:.


How to: Include a data file in a ClickOnce application

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Microsoft's ClickOnce deployment system offers an easy-to-use file association manager which is built into the Visual Studio deployment process. Developers can add up to 8 file associations which will automatically be associated with their application when the user runs the ClickOnce installer.


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By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Super User is a question and answer site for computer enthusiasts and power users. It only takes a minute to sign up. My problem is that the program is a ClickOnce application and if I go to a folder using Windows and try to open. Markdown files, I am not able to select MarkdownPad as the program to open these files. So is there anyway to make ClickOnce programs show up as an option for opening a filetype like you can with other installed programs? If the software makers didn't integrate this type of functionality into the application as a setting, finding the executable and associating it with the file type may still fail because they probably didn't design their application to start with a file passed in as a "file open" parameter.

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