ant-design-blazor/components/select/Select.razor

@namespace AntDesign
@using AntDesign.Internal
@inherits SelectBase

<CascadingValue Value=this>
    <CascadingValue Value=@("ant-select-dropdown") Name="PrefixCls">
        <div class="@ClassMapper.Class" style="@Style" id="@Id" title="@Title" tabindex="-1" @ref="Ref">
            <OverlayTrigger @ref="@_dropDown"
                            Visible="Open"
                            Disabled="Disabled"
                            Trigger="new TriggerType[] { TriggerType.Click }"
                            HiddenMode
                            OnVisibleChange="OnVisibleChange"
                            OverlayEnterCls="slide-up-enter slide-up-enter-active slide-up"
                            OverlayLeaveCls="slide-up-leave slide-up-leave-active slide-up">
                <Overlay>
                    <div style="@_dropdownStyle">
                        <div role="listbox" id="@(Id)_list" style="height: 0px; width: 0px; overflow: hidden;">
                            @for (var i = 0; SelectOptions.Count > i; ++i)
                            {
                                var selectOption = SelectOptions[i];
                                <div id="@(Id)_list_@(i)" role="option" aria-label="@selectOption.Value" aria-selected="@GetAriaSelected(selectOption)">@selectOption.Value</div>
                            }
                        </div>
                        <div class="" style="max-height:256px; overflow-y:auto;">
                            <div>
                                <div class="" style="display: flex; flex-direction: column;">
                                    @if (IsCreatedTagOption())
                                    {
                                        <SelectOption Value="@_searchValue" IsSearch="true">@_searchValue </SelectOption>
                                    }

                                    @ChildContent

                                    @if (Options != null && Options.Any())
                                    {
                                        foreach (var option in Options)
                                        {
                                            <SelectOption Value="@option.Key">@option.Label</SelectOption>
                                        }
                                    }

                                    @if (IsTagMode)
                                    {
                                        var tagOptions = new SortedSet<string>(_tagSelectOptions.Select(option => option.Value).Union(_tokenSelectOptions));
                                        @foreach (var tag in tagOptions)
                                        {
                                            <SelectOption Value="@tag" IsTag="true">@tag </SelectOption>
                                        }
                                    }
                                </div>
                            </div>
                        </div>
                        @if (IsEmptyOnSearch())
                        {
                            <div role="listbox" id="@(Id)_list" class="@ClassPrefix-item-empty">
                                @if (NotFoundContent != null)
                                {
                                    @NotFoundContent
                                }
                                else
                                {
                                    <Empty Image="Empty.PRESENTED_IMAGE_SIMPLE" Small="true" />
                                }
                            </div>
                        }
                        
                        @if (DropdownRender != null)
                        {
                            @DropdownRender(default, default);
                        }
                    </div>
                </Overlay>
                <ChildContent>
                    <CascadingValue Value="this" Name=@("ParentSelect")>
                        <SelectContent Prefix="@ClassPrefix"
                                       SearchValue="@_searchValue"
                                       IsOverlayShow="@_dropDown.IsOverlayShow()"
                                       OnInput="OnInput"
                                       Placeholder="@Placeholder"
                                       ShowPlaceholder="@ShowPlaceholder"
                                       GetOptionShowValue="GetShowValue" 
                                       OnRemoveSelected="OnRemoveSelected"
                                       InputWidth="@_inputWidth"/>
                    </CascadingValue>
                </ChildContent>
            </OverlayTrigger>
        </div>
    </CascadingValue>
</CascadingValue>