Скачать или смотреть Displaying Selected Items in a Custom Blazor Dropdown-Typeahead Component

Learn how to create a dynamic Blazor dropdown-typeahead component that shows the selected item in an input field, enhancing user experience and functionality!
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This video is based on the question https://stackoverflow.com/q/71429290/ asked by the user 'Kostas_Me_' ( https://stackoverflow.com/u/6322972/ ) and on the answer https://stackoverflow.com/a/71495473/ provided by the user 'Bogdan B' ( https://stackoverflow.com/u/10800899/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Displaying Selected Items in a Custom Blazor Dropdown-Typeahead Component

Creating a user-friendly and dynamic dropdown component is essential in modern web applications. In this post, we'll delve into how to build a custom dropdown-typeahead component using Blazor, focusing on displaying the selected item in the corresponding input field.

The Problem: How to Show Selected Item in an Input Tag?

You've created a custom dropdown-typeahead component in Blazor, allowing users to type and search through a list of options. However, you face a frustrating issue: once a user selects an item from the dropdown, it doesn't display in the <input> tag. Instead, the input shows what the user typed for searching, rather than the selected value.

Understanding the Component Structure

Before we dive into the solution, let's quickly summarize the relevant parts of your code structure:

Parent Component: This component manages the display of the dropdown and handles user selections.

TypeaheadDropdownComponent: The input field where users can type their search queries for filtering the dropdown options.

An Example of Your Current Code Setup

Here's a brief example of the code responsible for the dropdown logic:

[[See Video to Reveal this Text or Code Snippet]]

The Solution: Implementing a Method to Set the Input Value

To resolve this issue and display the selected value in the input field, we need to introduce a couple of changes:

Step 1: Modify TypeaheadDropdownComponent

Add a public method to your TypeaheadDropdownComponent that allows setting the search value. This function will update the _searchText and trigger a re-render of the component.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Update the Parent Component

Now, you need a reference to the TypeaheadDropdownComponent within your parent component. You will call the SetSearchValue method when the user selects an option from the dropdown.

Add a reference:

[[See Video to Reveal this Text or Code Snippet]]

Modify the selected item handling:

Once an item is selected, invoke the SetSearchValue method to display the selected item's title in the input field.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Final Adjustments

Ensure the dropdown displays the results dynamically based on the search input and behaves as expected when items are selected or unselected. With your modified component, users can now see their selected choices clearly in the input field.

Conclusion

In this post, we tackled the challenge of displaying the selected item in a custom Blazor dropdown-typeahead component. By implementing a simple method to set the input value and properly managing the component references, you can significantly enhance the user experience of your Blazor applications.

Feel free to share your thoughts or ask any questions regarding this implementation in the comments below!