For example, if you need to add a file or group of files to your published application as the result of a secondary build process, this will require regenerating and resigning the manifest. In MageUI. There is no equivalent functionality in Mage. ClickOnce applications and updates are published by posting them to the web or fileshare.
There is no method or model for controlling who can download the updates or when. ClickOnce only downloads the files that have changed since the last download. Sounds good, right? Unfortunately this determination is made by the build version of the file, not any hash or checksum value.
Some shops reversion all files with each build, even if nothing changed. While the merits of this practice are debatable, it does happen.
If you are using ClickOnce to deploy your application, that means every change, however slight, will resulting in re-downloading the full payload, making scenarios like 7 above even more unpleasant. Hopefully these tips and hints will illustrate what ClickOnce is and is not capable of and make your ClickOnce experience a little less frustrating. My Subscriber Account Advertise Write. Training Home State of. Staffing Home Looking for Staff?
Looking for Work? Contact Us. Dark Kimbie. One reason is that it requires your application to have full trust. By default, applications deployed with ClickOnce only have partial trust and you should set them to full trust only with a good understanding of what you are doing.
My client specifically requested that I do this as part of their installation and frankly, they trust me even more than they trust ClickOnce.
Adding the desktop shortcut is not part of the ClickOnce deployment. It is a function of the application that you are deploying. Listing 1 shows my DesktopShortcut class with two methods. One determines if the shortcut already exists. The other creates it. The methods are shared, so the class does not need to be instantiated.
The basis for this class came from an article by Les Smith. This is a rude solution that just slams the shortcut on the desktop without asking if the user wants it or not. If the user deletes the shortcut, the application will just re-create it on next startup.
A more polite approach would be to check for the existence of the shortcut and then ask the user if they want it installed or not. You could also choose to leverage the IsFirstRun property of the System. Application class. This way you only create the shortcut the first time the user runs the application. If the user deletes the shortcut, it will not get re-created by the application.
Go print it out and staple it to the end of this article and read it when you are finished here. I struggled with a number of things before I had a better understanding how ClickOnce works. If you take a look at the path of the file that the shortcut is pointing to, you may have a small fainting spell as one my clients did.
The versions of my custom application are also maintained in the cache as updates are downloaded. NET Framework and other common pieces such as third-party tools or your own custom APIs that get shared across applications, only need to be installed once and will be available to all users. This issue really bugged me, but, in fact, the progress bar does not tell the whole story! ClickOnce needs to create a completely new version folder for each update. ClickOnce will determine which files are new and copy only those files down from the Web server.
Figure 6 shows you where it is in my version. The internal people hit the Web server through the local network while the remote people are coming in over the Web through an ISA Server.
They had a proxy problem identified by the Show Details link in the ClickOnce error dialog that prevented them from getting at the manifests. Figure 7 shows this dialog box. After years of publicly documented frustration with early iterations of technologies that evolved into ClickOnce, I have finally found ClickOnce to be the tool I needed.
The fact that people are writing entire books on the topic says a lot about the depth of this technology. My Subscriber Account Advertise Write. Training Home State of. Staffing Home Looking for Staff? Looking for Work? For more information, see Code access security for ClickOnce applications. If the application requests more permissions than the zone allows, the end user can be prompted to make a trust decision. The end user can decide if ClickOnce applications such as Windows Forms applications, Windows Presentation Foundation applications, console applications, XAML browser applications, and Office solutions are trusted to run.
For more information, see How to: Configure the ClickOnce trust prompt behavior. The core ClickOnce deployment architecture is based on two XML manifest files: an application manifest and a deployment manifest. The files are used to describe where the ClickOnce applications are installed from, how they are updated, and when they are updated.
The application manifest describes the application itself. This includes the assemblies, the dependencies and files that make up the application, the required permissions, and the location where updates will be available. The deployment manifest describes how the application is deployed. This includes the location of the application manifest, and the version of the application that clients should run.
After it is created, the deployment manifest is copied to the deployment location. This can be a Web server, network file share, or media such as a CD. The application manifest and all the application files are also copied to a deployment location that is specified in the deployment manifest. This can be the same as the deployment location, or it can be a different location. When using the Publish Wizard in Visual Studio, the copy operations are performed automatically.
After it is deployed to the deployment location, end users can download and install the application by clicking an icon representing the deployment manifest file on a Web page or in a folder. In most cases, the end user is presented with a simple dialog box asking the user to confirm installation, after which installation proceeds and the application is started without additional intervention.
In cases where the application requires elevated permissions or if the application is not signed by a trusted certificate, the dialog box also asks the user to grant permission before the installation can continue. Though ClickOnce installs are per-user, permission elevation may be required if there are prerequisites that require administrator privileges.
For more information about elevated permissions, see Securing ClickOnce applications. Certificates can be trusted at the machine or enterprise level, so that ClickOnce applications signed with a trusted certificate can install silently. For more information about trusted certificates, see Trusted application deployment overview. Unlike other deployment technologies, nothing is added to the Program Files folder or the registry, and no administrative rights are required for installation.
It is also possible to prevent the application from being added to the Start menu and Add or Remove Programs group, in effect making it behave like a Web application. When the application developers create an updated version of the application, they generate a new application manifest and copy files to a deployment location—usually a sibling folder to the original application deployment folder.
The administrator updates the deployment manifest to point to the location of the new version of the application. In addition to the deployment location, the deployment manifest also contains an update location a Web page or network file share where the application checks for updated versions.
ClickOnce Publish properties are used to specify when and how often the application should check for updates. Update behavior can be specified in the deployment manifest, or it can be presented as user choices in the application's user interface by means of the ClickOnce APIs. In addition, Publish properties can be employed to make updates mandatory or to roll back to an earlier version.
For more information, see Choosing a ClickOnce update strategy. You can customize your ClickOnce installer to install third-party components along with your application.
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