<p>Quickly type a number (1 - 24) and blur the component:</p>

<TelerikAutoComplete Data="@ListItems"
                     @bind-Value="@SelectedValue"
                     ValueField="@nameof(ListItem.Text)"
                     DebounceDelay="@AutoCompleteDebounceDelay"
                     OnChange="@OnAutoCompleteChange"
                     OnOpen="@OnAutoCompleteOpen"
                     Width="300px" />

@code {
    private List<ListItem> ListItems { get; set; } = new();

    private string SelectedValue { get; set; } = string.Empty;

    private const int AutoCompleteDebounceDelay = 1000;

    private DateTime LastAutoCompleteOnChange { get; set; } = DateTime.Now;

    private void OnAutoCompleteOpen(AutoCompleteOpenEventArgs args)
    {
        if (DateTime.Now - LastAutoCompleteOnChange < new TimeSpan(0, 0, 0, AutoCompleteDebounceDelay * 2))
        {
            //args.IsCancelled = true;
        }
    }

    private void OnAutoCompleteChange(object currentValue)
    {
        LastAutoCompleteOnChange = DateTime.Now;
    }

    protected override void OnInitialized()
    {
        ListItems = new List<ListItem>();

        for (int i = 1; i <= 24; i++)
        {
            ListItems.Add(new ListItem()
            {
                Id = i,
                Text = $"{i}",
                Category = $"Category {i % 6 + 1}"
            });
        }

        base.OnInitialized();
    }

    public class ListItem
    {
        public int Id { get; set; }
        public string Text { get; set; } = string.Empty;
        public string Category { get; set; } = string.Empty;
    }
}

@using System.ComponentModel.DataAnnotations

<TelerikForm Model="@Employee" Width="300px">
    <FormItems>
        <FormItem>
            <Template>
                <label>
                    First Name
                    <TelerikTextBox AutoComplete="given-name" @bind-Value="@Employee.FirstName" />
                </label>
            </Template>
        </FormItem>
        <FormItem>
            <Template>
                <label>
                    Last Name
                    <TelerikTextBox AutoComplete="family-name" @bind-Value="@Employee.LastName" />
                </label>
            </Template>
        </FormItem>
        <FormItem>
            <Template>
                <label class="k-label k-form-label">State*</label>
                <TelerikAutoComplete Data="@StateList"
                                     ValueField="@nameof(DropDownListModel.DataText)"
                                     @bind-Value="@Employee.StateName"
                                     Placeholder="Enter a State, e.g., Alabama"
                                     OnChange="OnStateSelected">
                </TelerikAutoComplete>
                @*<TelerikDropDownList Data="@StateList"
                                         TextField="@nameof(DropDownListModel.DataText)"
                                         ValueField="@nameof(DropDownListModel.DataText)"
                                         @bind-Value="@Employee.StateName"
                                         DefaultText="Enter a State, e.g., Alabama"
                                         OnChange="OnStateSelected">
                    </TelerikDropDownList>*@
                <TelerikValidationMessage For="@(() => Employee.StateName)"></TelerikValidationMessage>
            </Template>
        </FormItem>
    </FormItems>
</TelerikForm>

@code {
    Person Employee { get; set; } = new Person();

    List<DropDownListModel> StateList { get; set; } = new List<DropDownListModel>() {
        new DropDownListModel() { DataText = "Alabama" },
        new DropDownListModel() { DataText = "Alaska" },
        new DropDownListModel() { DataText = "Texas" },
        new DropDownListModel() { DataText = "New York" },
        new DropDownListModel() { DataText = "Washington" },
        new DropDownListModel() { DataText = "California" },
        new DropDownListModel() { DataText = "Florida" }
    };

    void OnStateSelected(object newValue)
    {
    }

    public class Person
    {
        [Required]
        public string FirstName { get; set; }
        [Required]
        public string LastName { get; set; }
        [Required]
        public string StateName { get; set; }
    }

    public class DropDownListModel
    {
        public string DataText { get; set; }
    }
}