Dynamically Styling Items in RadAutoCompleteBox

Environment

Product	Version
RadAutoCompleteBox for ASP.NET AJAX	All

Description

I want to control the dynamic styling of the RadAutoCompleteBox. Specifically, I need to show items in inventory, turning the discontinued items red.

This KB article also answers the following questions:

• How can I change the background color of RadAutoCompleteBox items based on a condition?
• Is it possible to apply custom styles to specific items in RadAutoCompleteBox?
• Can I dynamically style RadAutoCompleteBox items using client-side events?

Solution

To dynamically style items in the RadAutoCompleteBox, use the OnClientDropDownOpened event. Loop through all items in the expanded dropdown and change their color based on whether they are discontinued.

1. Handle the OnClientDropDownOpened event in your RadAutoCompleteBox definition:

<telerik:RadAutoCompleteBox RenderMode="Lightweight" runat="server" ID="RadAutoCompleteBox1" EmptyMessage="Please type here" DataSourceID="SqlDataSource1" DataTextField="FirstName" InputType="Text" Width="350" DropDownWidth="150px" OnClientDropDownOpened="onDropDownOpened" />

1. Implement the onDropDownOpened function to loop through the dropdown items and apply the desired styling:

function onDropDownOpened(sender, args) {
    var dropDown = sender.get_dropDownElement();
    var list = dropDown.querySelector("ul");
    var itemCollection = list.childNodes;

    itemCollection.forEach((item) => {
        var isDiscontinued = getIsDiscontinued(item); // Logic to check if an item is discontinued

        if (isDiscontinued) {
            item.style.backgroundColor = "red";
        }
    });
}

function getIsDiscontinued(item) {
    // Replace with actual logic to check if an item is discontinued
    if (item.textContent.includes("n")) { // Example condition
        return true;
    }

    return false;
}

In this solution, the getIsDiscontinued function is a placeholder for your logic to determine if an item is discontinued. Replace it with your actual logic.

Notes

• The OnClientDropDownOpened event occurs when the dropdown of the RadAutoCompleteBox is opened.
• Use appropriate conditions within the getIsDiscontinued function to match your specific requirements for identifying discontinued items.

See Also

• RadAutoCompleteBox Client-Side Programming
• RadAutoCompleteBox Server-Side Programming