What is ClickOnce Feature of .NET 2005?
ClickOnce is a deployment technology that enables self-updating Windows-based applications that can be installed and run with minimal user interaction. Applications are published to a file share, Web Site, or media such as a CD.
Once published, ClickOnce apps can be automatically updated with minimal user input.
ClickOnce deployment overcomes three major issues inherent in deployment:
• Difficulties in updating applications. With Microsoft Windows Installer deployment, whenever an application is updated, the user must reinstall the entire application; with ClickOnce deployment, you can provide updates automatically. Only those portions of the application that have changed are downloaded, then the full, updated application is reinstalled from a new side-by-side folder.
• Impact to the user's computer. With Windows Installer deployment, applications often rely on shared components, with the potential for versioning conflicts; with ClickOnce deployment, each application is self-contained and cannot interfere with other applications.
• Security permissions. Windows Installer deployment requires administrative permissions and allows only limited user installation; ClickOnce deployment allows non-administrative users to install and grants only those Code Access Security permissions necessary for the application.
The core ClickOnce deployment architecture is based on two XML manifest files: an Application manifest file and a Deployment manifest file.
The application manifest describes the application itself, including the assemblies, the dependencies and files that make up the application, the required permissions, and the location where updates will be available. The application developer authors the application manifest by using the Publish Wizard in Visual Studio 2005 or the manifest generation tool (Mage.exe) in the .NET Framework SDK.
The deployment manifest describes how the application is deployed, including the location of the application manifest, and the version of the application that clients should run. An administrator authors the deployment manifest using the manifest generation tool (Mage.exe) in the .NET Framework SDK.
To make a ClickOnce application available to users, you must publish it to a Web server; file share, or removable media. You can publish the application using the Publish Wizard; additional properties related to publishing are available on the Publish page of the Project Designer or you can publish the application on the server manually
Once published, ClickOnce apps can be automatically updated with minimal user input.
ClickOnce deployment overcomes three major issues inherent in deployment:
• Difficulties in updating applications. With Microsoft Windows Installer deployment, whenever an application is updated, the user must reinstall the entire application; with ClickOnce deployment, you can provide updates automatically. Only those portions of the application that have changed are downloaded, then the full, updated application is reinstalled from a new side-by-side folder.
• Impact to the user's computer. With Windows Installer deployment, applications often rely on shared components, with the potential for versioning conflicts; with ClickOnce deployment, each application is self-contained and cannot interfere with other applications.
• Security permissions. Windows Installer deployment requires administrative permissions and allows only limited user installation; ClickOnce deployment allows non-administrative users to install and grants only those Code Access Security permissions necessary for the application.
The core ClickOnce deployment architecture is based on two XML manifest files: an Application manifest file and a Deployment manifest file.
The application manifest describes the application itself, including the assemblies, the dependencies and files that make up the application, the required permissions, and the location where updates will be available. The application developer authors the application manifest by using the Publish Wizard in Visual Studio 2005 or the manifest generation tool (Mage.exe) in the .NET Framework SDK.
The deployment manifest describes how the application is deployed, including the location of the application manifest, and the version of the application that clients should run. An administrator authors the deployment manifest using the manifest generation tool (Mage.exe) in the .NET Framework SDK.
To make a ClickOnce application available to users, you must publish it to a Web server; file share, or removable media. You can publish the application using the Publish Wizard; additional properties related to publishing are available on the Publish page of the Project Designer or you can publish the application on the server manually
Labels: Smart Clients Applications
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