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With ClickOnce applications, is it possible to replace the current files or install in a different directory when creating a new version? Because the error I get is:
Unable to install this application because an application with the same identity is already installed. To install this application, either modify the manifest version for this application or uninstall the preexisting application.
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ClickOnce is a deployment technology that enables you to create self-updating Windows-based applications that can be installed and run with minimal user interaction.
To delete the ClickOnce file cache, delete the contents of this folder based on the operating system. Deleting these files will clear the information for all installed ClickOnce applications. They'll reinstall the next time their shortcut or Uniform Resource Identifiers (URIs) are used.
To find the folder location, you can just run the app, open the task manager (CTRL-SHIFT-ESC), select the app and right-click|Open file location.
A ClickOnce application manifest is an XML file that describes an application that is deployed using ClickOnce. ClickOnce application manifests have the following elements and attributes. Element. Description. Attributes.
As the error message says, there are two options.
First, you as a developer should modify the version number of the ClickOnce manifest. This is done at the ClickOnce tab of the project settings. Note that ClickOnce version has nothing in common with your assembly (assemblies) version.
Another option is to uninstall the application and unfortunately, this probably has to be done manually. You have to find the ClickOnce deployment folder (C:\Users\username\AppData\Local\Apps\2.0) and manually delete all folder contents. This can also be done by invoking the
rundll32 dfshim CleanOnlineAppCache command from the commandline.
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