App_offline.htm download

For example, a WebSocket connection may delay app shut down. Files in the deployment folder are locked when the app is running. Locked files can't be overwritten during deployment. Files can also be unlocked by manually stopping the app pool in the IIS Manager on the server. Skip to main content.

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The tasks and walkthroughs in this topic assume that you've already created a solution that contains at least one web application project, and that you use a custom project file to control the deployment process as described in Web Deployment in the Enterprise. Alternatively, you can use the Contact Manager sample solution to follow the examples in the topic. In the Solution Explorer window, right-click your web application project, point to Add , and then click New Item. Add some simple HTML to inform users that the application is unavailable, and then save the file.

Do not include any server-side tags for example, any tags that are prefixed with "asp:". In the Solution Explorer window, right-click the new file, and then click Properties.

In the Properties window, in the Build Action row, select None. The next step is to modify your deployment logic to copy the file to the destination server at the start of the deployment process and remove it at the end.

The next procedure assumes that you're using a custom MSBuild project file to control your deployment process, as described in Understanding the Project File. If you're deploying direct from Visual Studio, you'll need to use a different approach.

The contentPath provider supports both physical directory paths and IIS website or application paths, which makes it the ideal choice for synchronizing a file between a Visual Studio project folder and an IIS web application. To deploy the file, your MSDeploy command should resemble this:. To remove the file from the destination site at the end of the deployment process, your MSDeploy command should resemble this:. To automate these commands as part of a build and deployment process, you need to integrate them into your custom MSBuild project file.

The next procedure describes how to do this. In the Contact Manager sample solution, this is the Publish. The SourceRoot property is defined elsewhere in the Publish. It indicates the location of the root folder for the source content relative to the current path—in other words, relative to the location of the Publish. The contentPath provider will not accept relative file paths, so you need to get an absolute path to your source file before you can deploy it. You can use the ConvertToAbsolutePath task to do this.

The BeforeTargets attribute specifies that you want this target to execute before the DeployAppOffline target, which you'll create in the next step. Add a new target named DeployAppOffline.