How can I trigger a JavaScript function once the Telerik RadPageView has completed loading?

Currently, I am utilizing Telerik UI for asp.net, specifically making use of RadTabStrip with partial page postbacks to navigate through various sets of data. When a user clicks on a tab, certain code runs to load data specific to that tab.

I have successfully implemented codebehind execution by setting the OnTabClick property of the RadTabStrip and then checking the clicked tab in the codebehind.

For instance:

protected void tab_Click(object sender, RadTabStripEventArgs e)
        {
            if (e.Tab.Text == "Info")
            {
                populateInfoTab();
            }
        }

private void populateInfotab()
{
    // Perform necessary actions
}

However, I am facing challenges in executing client-side JavaScript after clicking on a specific tab. Here's what I've attempted:
I set the OnClientTabSelected property and added some JavaScript like so:

function tab_ClientClick(sender, args)
{
    var tab = args.get_tab();
    if(tab.get_text() == "Info")
    {
        alert("Tab Clicked");
    }
}

The issue arises when I need to manipulate the InnerHtml of a particular div within the clicked pageview after it has been selected. Since the div is not present during the initial page load (the specific RadPageView is hidden), I cannot modify it at that time. Once the user clicks into the tab and the page view loads, I must be able to update the div's InnerHtml using JavaScript.

What would be the most effective approach to achieve this functionality?

Answer №1

Option one: Instead of setting the RenderSelectedPageOnly property to true, consider not doing so in order to render all page views on initial load, allowing you to easily find and modify elements using JavaScript.

Option two: Opt for simplicity by setting the content from the server as soon as the user control is loaded.

Option three: Utilize client-side events provided by either the native PageRequestManager class or RadAjaxManager to execute logic upon receiving a response. Focus on identifying the necessary postback and executing logic only if the desired element exists.

Option four: Trigger your function by registering a script from the server code with a command like:

populateInfoTab();
ScriptManager.RegisterStartupScript(Page, Page.GetType(), "uniqueKey", "myDesiredFunction()", true);

Consider using Sys.Application.Load to ensure the script is executed after IScriptControl initialization.

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