Install aspnet client

On the Installation progress page, confirm that your installation of the Web Server IIS role and required role services completed successfully, and then click Close. In the Windows Features dialog box, click Internet Information Services to install the default features. The following additional features are automatically selected:. This section describes how to add your ASP. NET application to your website in the following ways:.

In Plan an ASP. Right-click the site for which you want to create an application, and click Add Application. In the Alias text box, type a value for the application URL, such as marketing. This value is used to access the application in a URL. Click Select if you want to select a different application pool than the one listed in the Application pool box.

In the Select Application Pool dialog box, select an application pool from the Application pool list and then click OK. As a best practice, call the start method on the HubConnection after on. Doing so ensures your handlers are registered before any messages are received. Use try and catch with async and await or the Promise 's catch method to handle client-side errors. Use console. Set up client-side log tracing by passing a logger and type of event to log when the connection is made.

Messages are logged with the specified log level and higher. Available log levels are as follows:. Use the configureLogging method on HubConnectionBuilder to configure the log level.

Messages are logged to the browser console:. It won't automatically reconnect by default. Without any parameters, withAutomaticReconnect configures the client to wait 0, 2, 10, and 30 seconds respectively before trying each reconnect attempt, stopping after four failed attempts. Reconnecting state and fire its onreconnecting callbacks instead of transitioning to the Disconnected state and triggering its onclose callbacks like a HubConnection without automatic reconnect configured.

This provides an opportunity to warn users that the connection has been lost and to disable UI elements. If the client successfully reconnects within its first four attempts, the HubConnection will transition back to the Connected state and fire its onreconnected callbacks. This provides an opportunity to inform users the connection has been reestablished. Since the connection looks entirely new to the server, a new connectionId will be provided to the onreconnected callback.

The onreconnected callback's connectionId parameter will be undefined if the HubConnection was configured to skip negotiation. If the client doesn't successfully reconnect within its first four attempts, the HubConnection will transition to the Disconnected state and fire its onclose callbacks. This provides an opportunity to inform users the connection has been permanently lost and recommend refreshing the page:.

In order to configure a custom number of reconnect attempts before disconnecting or change the reconnect timing, withAutomaticReconnect accepts an array of numbers representing the delay in milliseconds to wait before starting each reconnect attempt.

The preceding example configures the HubConnection to start attempting reconnects immediately after the connection is lost. This is also true for the default configuration. If the first reconnect attempt fails, the second reconnect attempt will also start immediately instead of waiting 2 seconds like it would in the default configuration.

If the second reconnect attempt fails, the third reconnect attempt will start in 10 seconds which is again like the default configuration. The custom behavior then diverges again from the default behavior by stopping after the third reconnect attempt failure instead of trying one more reconnect attempt in another 30 seconds like it would in the default configuration.

If you want even more control over the timing and number of automatic reconnect attempts, withAutomaticReconnect accepts an object implementing the IRetryPolicy interface, which has a single method named nextRetryDelayInMilliseconds. The RetryContext has three properties: previousRetryCount , elapsedMilliseconds and retryReason which are a number , a number and an Error respectively. Before the first reconnect attempt, both previousRetryCount and elapsedMilliseconds will be zero, and the retryReason will be the Error that caused the connection to be lost.

After each failed retry attempt, previousRetryCount will be incremented by one, elapsedMilliseconds will be updated to reflect the amount of time spent reconnecting so far in milliseconds, and the retryReason will be the Error that caused the last reconnect attempt to fail. The software development kit SDK includes everything you need to build and run. NET applications, using command-line tools and any editor like Visual Studio. The runtime includes everything you need to run.

NET applications. The runtime is also included in the SDK. NET versions. NET Framework downloads for Windows? NET Explore. Open source. NET running in the browser on WebAssembly. Learn about Blazor. NET is a developer platform made up of tools, programming languages, and libraries for building many different types of applications.

NET extends the. NET developer platform with tools and libraries specifically for building web apps. Dig deeper: What is ASP. NET performs faster than any popular web framework in the independent TechEmpower benchmarks. Data sourced from official tests available at TechEmpower Round NET supports industry standard authentication protocols.

NET provides a built-in user database with support for multi-factor authentication and external authentication with Google, Twitter, and more.