ASP.NET Core ComboBox Overview
The ComboBox is part of Telerik UI for ASP.NET Core, a
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The Telerik UI ComboBox TagHelper and HtmlHelper for ASP.NET Core are server-side wrappers for the Kendo UI ComboBox widget.
The ComboBox displays a list of values and allows for a single selection from the list.
Initializing the ComboBox
The following example demonstrates how to define the ComboBox.
@(Html.Kendo().ComboBox()
.Name("combobox")
.DataTextField("ProductName")
.DataValueField("ProductID")
.DataSource(source => {
source.Read(read =>
{
read.Action("Products_Read", "ComboBox");
});
})
)
<kendo-combobox name="combobox"
datatextfield="ProductName"
datavaluefield="ProductID">
<datasource>
<transport>
<read url="@Url.Action("Products_Read", "ComboBox")"/>
</transport>
</datasource>
</kendo-combobox>
public class ComboBoxController : Controller
{
public IActionResult Index()
{
return View();
}
public JsonResult Products_Read()
{
var result = Enumerable.Range(0, 50).Select(i => new ProductViewModel
{
ProductID = "" + i,
ProductName = "Product " + i
});
return Json(result);
}
}
Starting with the 2024 Q3 release, the HtmlHelper version of the component supports declarative initialization.
Basic Configuration
The following example demonstrates the basic configuration of the ComboBox.
@(Html.Kendo().ComboBox()
.Name("products")
.Placeholder("Select product")
.DataTextField("ProductName")
.DataValueField("ProductID")
.HtmlAttributes(new { style = "width:100%;" })
.Filter(FilterType.Contains)
.AutoBind(false)
.MinLength(3)
.DataSource(source => source
.Read(read => read.Action("GetProducts", "Home"))
)
)
@addTagHelper *, <<Your Project Name Goes Here>>
<kendo-combobox name="products" filter="FilterType.Contains"
placeholder="Select product"
datatextfield="ProductName"
datavaluefield="ProductID"
auto-bind="false"
min-length="3" style="width: 100%;">
<datasource type="DataSourceTagHelperType.Custom">
<transport>
<read url="@Url.Action("GetProducts", "Home")" />
</transport>
</datasource>
</kendo-combobox>
public JsonResult GetProducts()
{
return new JsonResult(new[] { new { ProductName = "ProductName 1", ProductID = 1} });
}
Functionality and Features
| Feature | Description |
|---|---|
| Binding | You can bind the ComboBox to local arrays of data and to remote data services. |
| Appearance | You can customize the appearance of the ComboBox by configuring its size, fill mode, and border radius. |
| Grouping | In the ComboBox, you can display data items that are grouped by a specific model field. |
| Virtualization | The built-in virtualization of the ComboBox allows you to display large datasets. |
| Filtering | You can display only a subset of the available data by using the server-side filtering of the ComboBox. |
| Templates | To take full control over the rendering of the ComboBox items, popup header, and popup footer, you can use the available templates. |
| Cascading | You can use a series of two or more cascaded ComboBoxes. |
| Accessibility | The ComboBox is accessible by screen readers and provides WAI-ARIA, Section 508, WCAG 2.2, and keyboard support. |
To learn more about the appearance, anatomy, and accessibility of the ComboBox, visit the Progress Design System documentation—an information portal offering rich component usage guidelines, descriptions of the available style variables, and globalization support details.
Next Steps
- Getting Started with the ComboBox
Basic Usage of the ComboBox HtmlHelper for ASP.NET Core (Demo)
Basic Usage of the ComboBox TagHelper for ASP.NET Core (Demo)
- ComboBox in Razor Pages