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StevenRasmussenStevenRasmussen
authoredApr 19, 2025
Autocomplete - close the dropdown via code (#3715)
* Added a method to close the dropdown via code. * Added a demo page showing how to invoke the 'CloseDropdownAsync' method. * Added a unit test.
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‎examples/Demo/Shared/Microsoft.FluentUI.AspNetCore.Components.xml

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<member name="M:Microsoft.FluentUI.AspNetCore.Components.FluentAutocomplete`1.ShouldRender">
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<summary />
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</member>
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<member name="M:Microsoft.FluentUI.AspNetCore.Components.FluentAutocomplete`1.CloseDropdownAsync">
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<summary>
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Closes the multiselect dropdown.
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</summary>
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<returns></returns>
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</member>
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<member name="M:Microsoft.FluentUI.AspNetCore.Components.FluentAutocomplete`1.InputHandlerAsync(Microsoft.AspNetCore.Components.ChangeEventArgs)">
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<summary />
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</member>

‎examples/Demo/Shared/Pages/List/Autocomplete/AutocompletePage.razor

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</Description>
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</DemoSection>
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<DemoSection Title="Close via code" Component="@typeof(AutocompleteCloseViaCode)">
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<Description>
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<p>
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This example demonstrates how to close the dropdown in code.
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</p>
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</Description>
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</DemoSection>
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<h2 id="documentation">Documentation</h2>
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<ApiDocumentation Component="typeof(FluentAutocomplete<>)" GenericLabel="TOption" />

‎examples/Demo/Shared/Pages/List/Autocomplete/Examples/AutocompleteCloseViaCode.razor

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@inject DataSource Data
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@inject IDialogService DialogService
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<FluentAutocomplete @ref=_autocomplete
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TOption="Country"
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AutoComplete="off"
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Autofocus="true"
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Label="Select a country"
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Width="250px"
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MaxAutoHeight="@(AutoHeight ? "200px" : null)"
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Placeholder="Select countries"
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OnOptionsSearch="@OnSearchAsync"
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OptionDisabled="@(e => e.Code == "au")"
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MaximumSelectedOptions="5"
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OptionText="@(item => item.Name)"
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@bind-SelectedOptions="@SelectedItems">
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<FooterContent>
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<FluentStack Orientation="Orientation.Horizontal"
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HorizontalAlignment="HorizontalAlignment.Right"
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Style="padding: 3px;">
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<FluentButton OnClick="OpenDialog">
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Show Dialog
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</FluentButton>
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</FluentStack>
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</FooterContent>
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</FluentAutocomplete>
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<p>
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<b>Selected</b>: @(String.Join(" - ", SelectedItems.Select(i => i.Name)))
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</p>
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@code
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{
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FluentAutocomplete<Country> _autocomplete = default!;
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bool AutoHeight = false;
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IEnumerable<Country> SelectedItems = Array.Empty<Country>();
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private async Task OnSearchAsync(OptionsSearchEventArgs<Country> e)
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{
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var allCountries = await Data.GetCountriesAsync();
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e.Items = allCountries.Where(i => i.Name.StartsWith(e.Text, StringComparison.OrdinalIgnoreCase))
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.OrderBy(i => i.Name);
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}
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private async Task OpenDialog()
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{
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await _autocomplete.CloseDropdownAsync();
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await DialogService.ShowInfoAsync("You pressed a button to open a dialog and close the dropdown.");
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}
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}

‎src/Core/Components/List/FluentAutocomplete.razor.cs

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/// <summary />
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protected override bool ShouldRender() => _shouldRender;
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/// <summary>
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/// Closes the multiselect dropdown.
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/// </summary>
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/// <returns></returns>
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public async Task CloseDropdownAsync()
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{
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IsMultiSelectOpened = false;
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await InvokeAsync(StateHasChanged);
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}
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/// <summary />
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protected override async Task InputHandlerAsync(ChangeEventArgs e)
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{

‎tests/Core/List/FluentAutocompleteTests.FluentAutocomplete_CloseManually-DropdownOpened.verified.razor.html

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<div class=" fluent-autocomplete-multiselect" style="width: 100%;" b-hg72r5b4ox="">
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<fluent-text-field style="width: 100%; min-width: 100%;" id="xxx" value="" current-value="" appearance="outline" blazor:onchange="1" role="combobox" aria-expanded="true" aria-controls="myAutocomplete-popup" aria-label="3-Bill Gates (1 of 3)" blazor:onclick="2" blazor:oninput="3" blazor:elementreference="">
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<svg slot="end" style="width: 16px; fill: var(--accent-fill-rest); cursor: pointer;" focusable="true" tabindex="0" role="button" viewBox="0 0 16 16" blazor:onkeydown="4" blazor:onclick="5" blazor:onfocus="6">
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<title>Search</title>
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<path d="M9.1 10.17a4.5 4.5 0 1 1 1.06-1.06l3.62 3.61a.75.75 0 1 1-1.06 1.06l-3.61-3.61Zm.4-3.67a3 3 0 1 0-6 0 3 3 0 0 0 6 0Z"></path>
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</svg>
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</fluent-text-field>
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<div class="fluent-overlay" style="cursor: auto; position: fixed; display: flex; align-items: center; justify-content: center; z-index: 9900;" blazor:onclick="7" blazor:oncontextmenu="8" blazor:oncontextmenu:preventdefault="" b-xkrr7evqik="">
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<div b-xkrr7evqik=""></div>
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</div>
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<fluent-anchored-region anchor="xxx" horizontal-positioning-mode="dynamic" horizontal-default-position="right" horizontal-inset="" horizontal-threshold="0" horizontal-scaling="content" vertical-positioning-mode="dynamic" vertical-default-position="unset" vertical-threshold="0" vertical-scaling="content" auto-update-mode="auto" style="z-index: 9999;" b-2ov9fhztky="" blazor:elementreference="xxx">
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<div style="z-index: 9999; background-color: var(--neutral-layer-floating); box-shadow: var(--elevation-shadow-flyout); margin-top: 10px; border-radius: calc(var(--control-corner-radius) * 2px); background-color: var(--neutral-layer-floating);" b-2ov9fhztky="">
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<div id="xxx" role="listbox" style="width: 100%;" tabindex="0" b-hg72r5b4ox="">
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<fluent-option id="xxx" value="3-Bill Gates" blazor:onclick="9" aria-selected="true" selectable="" blazor:elementreference="xxx">3-Bill Gates</fluent-option>
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<fluent-option id="xxx" value="1-Denis Voituron" blazor:onclick="10" aria-selected="false" blazor:elementreference="xxx">1-Denis Voituron</fluent-option>
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<fluent-option id="xxx" value="2-Vincent Baaij" blazor:onclick="11" aria-selected="false" blazor:elementreference="xxx">2-Vincent Baaij</fluent-option>
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</div>
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</div>
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</fluent-anchored-region>
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</div>

‎tests/Core/List/FluentAutocompleteTests.FluentAutocomplete_CloseManually.verified.razor.html

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<div class=" fluent-autocomplete-multiselect" style="width: 100%;" b-hg72r5b4ox="">
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<fluent-text-field style="width: 100%; min-width: 100%;" id="xxx" value="" current-value="" appearance="outline" blazor:onchange="1" role="combobox" aria-expanded="false" aria-controls="" blazor:onclick="2" blazor:oninput="3" blazor:elementreference="">
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<svg slot="end" style="width: 16px; fill: var(--accent-fill-rest); cursor: pointer;" focusable="true" tabindex="0" role="button" viewBox="0 0 16 16" blazor:onkeydown="4" blazor:onclick="5" blazor:onfocus="6">
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<title>Search</title>
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<path d="M9.1 10.17a4.5 4.5 0 1 1 1.06-1.06l3.62 3.61a.75.75 0 1 1-1.06 1.06l-3.61-3.61Zm.4-3.67a3 3 0 1 0-6 0 3 3 0 0 0 6 0Z"></path>
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</svg>
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</fluent-text-field>
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</div>

‎tests/Core/List/FluentAutocompleteTests.razor

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cut.Verify();
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}
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[Fact]
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public async Task FluentAutocomplete_CloseManually()
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{
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IEnumerable<Customer> SelectedItems = Array.Empty<Customer>();
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FluentAutocomplete<Customer> autocomplete = default!;
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// Arrange
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var cut = Render<FluentAutocomplete<Customer>>(
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@<FluentAutocomplete Id="myAutocomplete" TOption="Customer"
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@ref=autocomplete
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SelectValueOnTab="true"
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@bind-SelectedOptions="@SelectedItems"
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OnOptionsSearch="@OnSearchAsync" />
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);
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// Act: click to open -> KeyDow + Enter to select
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var input = cut.Find("fluent-text-field");
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input.Click();
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// Verify that the dropdown is open
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cut.Verify(suffix: "DropdownOpened");
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// Close the dropdown
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await autocomplete.CloseDropdownAsync();
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// Verify that the dropdown is closed
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cut.Verify();
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}
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// Send a key code
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private async Task PressKeyAsync(IRenderedComponent<FluentAutocomplete<Customer>> cut, KeyCode key, bool popoverOpened = false)
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{

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