How can the html tag value be updated periodically in asp.net without causing a page load?

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One way to update the HTML tag value periodically without causing a page load in asp.net is by using AJAX (Asynchronous JavaScript and XML) technology.

You can use the setInterval() method in JavaScript to call a function that sends a request to the server at a specified interval to get the updated value. The server-side code can then return the updated value in a JSON format.

On the client-side, the updated value can be parsed from the JSON response and assigned to the HTML tag using JavaScript. This way, the HTML tag value can be updated periodically without refreshing the page.

Alternatively, you can use SignalR, a real-time web communication library, to push updates to the client-side without the need for periodic requests. SignalR establishes a two-way communication channel between the server and the client, enabling real-time updates.