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Overview

The Blazor MultiColumn ComboBox is a dropdown component that displays items in a detailed, table-like format with multiple columns, providing more information than standard dropdown lists. It enhances user interaction through features such as data binding from various sources, item grouping, and advanced filtering for quick searches. Additionally, it supports sorting, virtualization for large datasets, paging, and customizable templates for headers, footers, and list items.


Data binding

The Blazor MultiColumn ComboBox lets users bind data from various local and remote data sources, such as IEnumerable/List, RESTful services, OData services, and WCF services. It utilizes a data manager to handle data and allows for customization of data requests and processing.

Blazor MultiColumn ComboBox data binding.


Blazor MultiColumn ComboBox component column.

Columns

Customize the appearance of each column with a variety of options. The MultiColumn ComboBox supports auto-generating columns, which simplifies the process by automatically creating columns based on the data source. Additionally, you can modify the column header text to reflect specific data, adjust the column width for clear display, and set the column alignment (left, center, or right) to enhance readability and visual balance according to your application’s needs.


Paging

The Blazor MultiColumn ComboBox offers built-in support to manage large datasets using its paging feature. The component can handle extensive data collections by breaking them into manageable pages, thereby enhancing performance and improving the user experience.

Blazor MultiColumn ComboBox component paging.


Blazor MultiColumn ComboBox component filtering.

Filtering

The Blazor MultiColumn ComboBox allows users to find what they are looking for quickly with its built-in filtering feature. This functionality enables users to type in search queries and see results in the dropdown, making navigation fast.


Sorting

The Blazor MultiColumn ComboBox allows users to sort rows in either ascending or descending order by simply clicking the header of a column. Users can sort data in multiple columns by holding the Ctrl key while clicking the header. This feature enables users to organize complex datasets more effectively.

Blazor MultiColumn ComboBox component sorting.


Blazor MultiColumn ComboBox component grouping.

Grouping

Organize items into categories within the MultiColumn ComboBox. Grouping related items together allows users to filter and select items more efficiently.


Virtualization

Enhance the performance of the MultiColumn ComboBox by displaying only the items currently in view. Virtualization allows for smooth scrolling and efficient management of large datasets while minimizing load times.

Blazor MultiColumn ComboBox component virtualization.


Customize the appearance of the dropdown list to create a unique look by modifying the header, footer, and list items with templates.

Styling Blazor MultiColumn ComboBox pop-up list with column header template.

Column header templates

Define custom templates for column headers to align their appearance with the design of your application.

Styling Blazor MultiColumn ComboBox pop-up list with column template.

Column templates

Customize the display of data in each column to create a unique look and feel.

Styling Blazor MultiColumn ComboBox pop-up list with footer template

Add custom footers to the dropdown. They can include summary information, additional components, or any other content you wish to display.


Custom input value

The MultiColumn ComboBox allows users to input custom values that may not be present in the predefined list. Users can enter new or unique values directly into the input field, thereby broadening the range of possible entries beyond the original options.

Blazor MultiColumn ComboBox custom input value.


Blazor MultiColumn ComboBox component floating label.

Floating labels

The MultiColumn ComboBox includes floating label functionality, which allows labels to float above the input field when the user interacts with the component or when a value is selected. This feature enhances form usability by providing clear context without occupying additional space.


Edit form support

Seamlessly integrate the MultiColumn ComboBox with the Blazor edit form component. This integration ensures that the component can be used within forms, enabling smooth data entry, validation, and submission workflows.

Blazor MultiColumn ComboBox edit form support.


Blazor MultiColumn ComboBox component popup dimension.

Pop-up dimensions

The MultiColumn ComboBox offers customizable pop-up dimensions, allowing you to define the width and height of the dropdown to suit your application’s layout and data requirements. This feature ensures that the dropdown displays enough data without overwhelming the user interface.


Built-in themes

The MultiColumn ComboBox component includes several built-in themes, such as Material, Bootstrap, Fabric (Office 365), Tailwind CSS, and high contrast. Users can customize these built-in themes or create new ones by overriding Sass variables or using the Theme Studio application.

Accessibility

The MultiColumn ComboBox is designed with accessibility in mind, ensuring compliance with the latest web accessibility standards, such as WAI-ARIA. It supports full keyboard navigation and screen reader compatibility, making the component usable for individuals with disabilities.


Blazor MultiColumn ComboBox code example

Easily get started with the Blazor MultiColumn ComboBox using a few simple lines of C# code, as demonstrated in the following example. Also explore this Blazor MultiColumn ComboBox example, which shows you how to render and configure the Blazor MultiColumn ComboBox component.

@using Syncfusion.Blazor.MultiColumnComboBox

<SfMultiColumnComboBox @bind-Value="@Value" DataSource="@Products" ValueField="Name" TextField="Name" Placeholder="Select a product"></SfMultiColumnComboBox>

@code {
    public class Product
    {
        public string Name { get; set; }
        public decimal Price { get; set; }
        public string Availability { get; set; }
        public string Category { get; set; }
        public double Rating { get; set; }
    }
    private List<Product> Products = new List<Product>();
    private string Value { get; set; } = "Smartphone";
    protected override Task OnInitializedAsync()
    {
        Products = new List<Product>
        {
            new Product { Name = "Laptop", Price = 999.99m, Availability = "In Stock", Category = "Electronics", Rating = 4.5 },
            new Product { Name = "Smartphone", Price = 599.99m, Availability = "In Stock", Category = "Electronics", Rating = 4.3 },
            new Product { Name = "Tablet", Price = 299.99m, Availability = "In Stock", Category = "Electronics", Rating = 4.2 },
            new Product { Name = "Headphones", Price = 49.99m, Availability = "In Stock", Category = "Accessories", Rating = 4.0 },
            new Product { Name = "Smartwatch", Price = 199.99m, Availability = "Limited Stock", Category = "Wearables", Rating = 4.4 },
            new Product { Name = "Monitor", Price = 129.99m, Availability = "In Stock", Category = "Electronics", Rating = 4.6 },
            new Product { Name = "Keyboard", Price = 39.99m, Availability = "In Stock", Category = "Accessories", Rating = 4.1 },
            new Product { Name = "Mouse", Price = 19.99m, Availability = "Out of Stock", Category = "Accessories", Rating = 4.3 },
            new Product { Name = "Printer", Price = 89.99m, Availability = "In Stock", Category = "Office Supplies", Rating = 4.2 },
            new Product { Name = "Camera", Price = 499.99m, Availability = "In Stock", Category = "Electronics", Rating = 4.7 }
        };
        return base.OnInitializedAsync();
    }
}

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