# DropdownField

> A control that allows the user to pick a choice from a list of options. For more information, refer to UXML element DropdownField.

## Definition

* **Type:** Class
* **Namespace:** [UnityEngine.UIElements](/engine/6000.0/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule
* **Inherits from:** [PopupField\<string>](/engine/6000.0/script-reference/unityengine/uielements/popupfield1.md)
* **Implements:** [IEventHandler](/engine/6000.0/script-reference/unityengine/uielements/ieventhandler.md), [IResolvedStyle](/engine/6000.0/script-reference/unityengine/uielements/iresolvedstyle.md), [ITransform](/engine/6000.0/script-reference/unityengine/uielements/itransform.md), [ITransitionAnimations](/engine/6000.0/script-reference/unityengine/uielements/experimental/itransitionanimations.md), [IExperimentalFeatures](/engine/6000.0/script-reference/unityengine/uielements/iexperimentalfeatures.md), [IVisualElementScheduler](/engine/6000.0/script-reference/unityengine/uielements/ivisualelementscheduler.md), [IBindable](/engine/6000.0/script-reference/unityengine/uielements/ibindable.md), [INotifyValueChanged\<string>](/engine/6000.0/script-reference/unityengine/uielements/inotifyvaluechanged1.md), [IMixedValueSupport](/engine/6000.0/script-reference/unityengine/uielements/imixedvaluesupport.md)

```csharp
public class DropdownField : PopupField<string>, IEventHandler, IResolvedStyle, ITransform, ITransitionAnimations, IExperimentalFeatures, IVisualElementScheduler, IBindable, INotifyValueChanged<string>, IMixedValueSupport
```

## Constructors

| Constructor                                                                                                                                                                                                                                                                                                                                  | Description                                      |
| -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------ |
| [DropdownField()](/engine/6000.0/script-reference/unityengine/uielements/dropdownfield/ctor.md#dropdownfield\(\))                                                                                                                                                                                                                            | Construct an empty DropdownField.                |
| [DropdownField(System.Collections.Generic.List\{System.String},System.Int32,System.Func\{System.String,System.String},System.Func\{System.String,System.String})](/engine/6000.0/script-reference/unityengine/uielements/dropdownfield/ctor.md#dropdownfield\(liststring-int-funcstring-string-funcstring-string\))                          | Construct a DropdownField.                       |
| [DropdownField(System.Collections.Generic.List\{System.String},System.String,System.Func\{System.String,System.String},System.Func\{System.String,System.String})](/engine/6000.0/script-reference/unityengine/uielements/dropdownfield/ctor.md#dropdownfield\(liststring-string-funcstring-string-funcstring-string\))                      | Construct a DropdownField.                       |
| [DropdownField(System.String)](/engine/6000.0/script-reference/unityengine/uielements/dropdownfield/ctor.md#dropdownfield\(string\))                                                                                                                                                                                                         | Construct a DropdownField with a Label in front. |
| [DropdownField(System.String,System.Collections.Generic.List\{System.String},System.Int32,System.Func\{System.String,System.String},System.Func\{System.String,System.String})](/engine/6000.0/script-reference/unityengine/uielements/dropdownfield/ctor.md#dropdownfield\(string-liststring-int-funcstring-string-funcstring-string\))     | Construct a DropdownField.                       |
| [DropdownField(System.String,System.Collections.Generic.List\{System.String},System.String,System.Func\{System.String,System.String},System.Func\{System.String,System.String})](/engine/6000.0/script-reference/unityengine/uielements/dropdownfield/ctor.md#dropdownfield\(string-liststring-string-funcstring-string-funcstring-string\)) | Construct a DropdownField.                       |

## Inheritance

**Inherited Members:**

* [PopupField\<string>.ussClassName](/engine/6000.0/script-reference/unityengine/uielements/popupfield1/ussclassname.md)
* [PopupField\<string>.labelUssClassName](/engine/6000.0/script-reference/unityengine/uielements/popupfield1/labelussclassname.md)
* [PopupField\<string>.inputUssClassName](/engine/6000.0/script-reference/unityengine/uielements/popupfield1/inputussclassname.md)
* PopupField\<string>.SetValueWithoutNotify(string)
* [PopupField\<string>.formatSelectedValueCallback](/engine/6000.0/script-reference/unityengine/uielements/popupfield1/formatselectedvaluecallback.md)
* [PopupField\<string>.formatListItemCallback](/engine/6000.0/script-reference/unityengine/uielements/popupfield1/formatlistitemcallback.md)
* [PopupField\<string>.value](/engine/6000.0/script-reference/unityengine/uielements/popupfield1/value.md)
* [PopupField\<string>.index](/engine/6000.0/script-reference/unityengine/uielements/popupfield1/index.md)
* [BasePopupField\<string, string>.ussClassName](/engine/6000.0/script-reference/unityengine/uielements/basepopupfield2/ussclassname.md)
* [BasePopupField\<string, string>.textUssClassName](/engine/6000.0/script-reference/unityengine/uielements/basepopupfield2/textussclassname.md)
* [BasePopupField\<string, string>.arrowUssClassName](/engine/6000.0/script-reference/unityengine/uielements/basepopupfield2/arrowussclassname.md)
* [BasePopupField\<string, string>.labelUssClassName](/engine/6000.0/script-reference/unityengine/uielements/basepopupfield2/labelussclassname.md)
* [BasePopupField\<string, string>.inputUssClassName](/engine/6000.0/script-reference/unityengine/uielements/basepopupfield2/inputussclassname.md)
* [BasePopupField\<string, string>.SetValueWithoutNotify(string)](/engine/6000.0/script-reference/unityengine/uielements/basepopupfield2/setvaluewithoutnotify.md)
* BasePopupField\<string, string>.UpdateMixedValueContent()
* [BasePopupField\<string, string>.textElement](/engine/6000.0/script-reference/unityengine/uielements/basepopupfield2/textelement.md)
* [BasePopupField\<string, string>.choices](/engine/6000.0/script-reference/unityengine/uielements/basepopupfield2/choices.md)
* [BasePopupField\<string, string>.text](/engine/6000.0/script-reference/unityengine/uielements/basepopupfield2/text.md)
* [BaseField\<string>.noLabelVariantUssClassName](/engine/6000.0/script-reference/unityengine/uielements/basefield1/nolabelvariantussclassname.md)
* [BaseField\<string>.labelDraggerVariantUssClassName](/engine/6000.0/script-reference/unityengine/uielements/basefield1/labeldraggervariantussclassname.md)
* [BaseField\<string>.mixedValueLabelUssClassName](/engine/6000.0/script-reference/unityengine/uielements/basefield1/mixedvaluelabelussclassname.md)
* [BaseField\<string>.alignedFieldUssClassName](/engine/6000.0/script-reference/unityengine/uielements/basefield1/alignedfieldussclassname.md)
* BaseField\<string>.HandleEventBubbleUp(EventBase)
* [BaseField\<string>.UpdateMixedValueContent()](/engine/6000.0/script-reference/unityengine/uielements/basefield1/updatemixedvaluecontent.md)
* [BaseField\<string>.rawValue](/engine/6000.0/script-reference/unityengine/uielements/basefield1/rawvalue.md)
* [BaseField\<string>.labelElement](/engine/6000.0/script-reference/unityengine/uielements/basefield1/labelelement.md)
* [BaseField\<string>.label](/engine/6000.0/script-reference/unityengine/uielements/basefield1/label.md)
* [BaseField\<string>.showMixedValue](/engine/6000.0/script-reference/unityengine/uielements/basefield1/showmixedvalue.md)
* [BaseField\<string>.mixedValueLabel](/engine/6000.0/script-reference/unityengine/uielements/basefield1/mixedvaluelabel.md)
* [BindableElement.binding](/engine/6000.0/script-reference/unityengine/uielements/bindableelement/binding.md)
* [BindableElement.bindingPath](/engine/6000.0/script-reference/unityengine/uielements/bindableelement/bindingpath.md)
* [VisualElement.disabledUssClassName](/engine/6000.0/script-reference/unityengine/uielements/visualelement/disabledussclassname.md)
* [VisualElement.SendEvent(EventBase)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/sendevent.md)
* [VisualElement.SetEnabled(bool)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/setenabled.md)
* [VisualElement.MarkDirtyRepaint()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/markdirtyrepaint.md)
* [VisualElement.ContainsPoint(Vector2)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/containspoint.md)
* [VisualElement.GetClasses()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/getclasses.md)
* [VisualElement.ClearClassList()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/clearclasslist.md)
* [VisualElement.AddToClassList(string)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/addtoclasslist.md)
* [VisualElement.RemoveFromClassList(string)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/removefromclasslist.md)
* [VisualElement.ToggleInClassList(string)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/toggleinclasslist.md)
* [VisualElement.EnableInClassList(string, bool)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/enableinclasslist.md)
* [VisualElement.ClassListContains(string)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/classlistcontains.md)
* [VisualElement.FindAncestorUserData()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/findancestoruserdata.md)
* [VisualElement.SetBinding(BindingId, Binding)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/setbinding.md)
* [VisualElement.GetBinding(BindingId)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/getbinding.md)
* [VisualElement.TryGetBinding(BindingId, Binding)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/trygetbinding.md)
* [VisualElement.GetBindingInfos()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/getbindinginfos.md)
* [VisualElement.HasBinding(BindingId)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/hasbinding.md)
* [VisualElement.ClearBinding(BindingId)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/clearbinding.md)
* [VisualElement.ClearBindings()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/clearbindings.md)
* [VisualElement.GetHierarchicalDataSourceContext()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/gethierarchicaldatasourcecontext.md)
* [VisualElement.GetDataSourceContext(BindingId)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/getdatasourcecontext.md)
* [VisualElement.TryGetDataSourceContext(BindingId, DataSourceContext)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/trygetdatasourcecontext.md)
* [VisualElement.TryGetLastBindingToUIResult(BindingId, BindingResult)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/trygetlastbindingtouiresult.md)
* [VisualElement.TryGetLastBindingToSourceResult(BindingId, BindingResult)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/trygetlastbindingtosourceresult.md)
* [VisualElement.Add(VisualElement)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/add.md)
* [VisualElement.Insert(int, VisualElement)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/insert.md)
* [VisualElement.Remove(VisualElement)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/remove.md)
* [VisualElement.RemoveAt(int)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/removeat.md)
* [VisualElement.Clear()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/clear.md)
* [VisualElement.ElementAt(int)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/elementat.md)
* [VisualElement.IndexOf(VisualElement)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/indexof.md)
* [VisualElement.Children()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/children.md)
* [VisualElement.Sort(Comparison\<VisualElement>)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/sort.md)
* [VisualElement.BringToFront()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/bringtofront.md)
* [VisualElement.SendToBack()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/sendtoback.md)
* [VisualElement.PlaceBehind(VisualElement)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/placebehind.md)
* [VisualElement.PlaceInFront(VisualElement)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/placeinfront.md)
* [VisualElement.RemoveFromHierarchy()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/removefromhierarchy.md)
* [VisualElement.GetFirstOfType\<T>()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/getfirstoftype.md)
* [VisualElement.GetFirstAncestorOfType\<T>()](/engine/6000.0/script-reference/unityengine/uielements/visualelement/getfirstancestoroftype.md)
* [VisualElement.Contains(VisualElement)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/contains.md)
* [VisualElement.FindCommonAncestor(VisualElement)](/engine/6000.0/script-reference/unityengine/uielements/visualelement/findcommonancestor.md)
* [VisualElement.viewDataKey](/engine/6000.0/script-reference/unityengine/uielements/visualelement/viewdatakey.md)
* [VisualElement.userData](/engine/6000.0/script-reference/unityengine/uielements/visualelement/userdata.md)
* [VisualElement.disablePlayModeTint](/engine/6000.0/script-reference/unityengine/uielements/visualelement/disableplaymodetint.md)
* [VisualElement.usageHints](/engine/6000.0/script-reference/unityengine/uielements/visualelement/usagehints.md)
* [VisualElement.transform](/engine/6000.0/script-reference/unityengine/uielements/visualelement/transform.md)
* [VisualElement.scaledPixelsPerPoint](/engine/6000.0/script-reference/unityengine/uielements/visualelement/scaledpixelsperpoint.md)
* [VisualElement.layout](/engine/6000.0/script-reference/unityengine/uielements/visualelement/layout.md)
* [VisualElement.contentRect](/engine/6000.0/script-reference/unityengine/uielements/visualelement/contentrect.md)
* [VisualElement.paddingRect](/engine/6000.0/script-reference/unityengine/uielements/visualelement/paddingrect.md)
* [VisualElement.worldBound](/engine/6000.0/script-reference/unityengine/uielements/visualelement/worldbound.md)
* [VisualElement.localBound](/engine/6000.0/script-reference/unityengine/uielements/visualelement/localbound.md)
* [VisualElement.worldTransform](/engine/6000.0/script-reference/unityengine/uielements/visualelement/worldtransform.md)
* [VisualElement.pickingMode](/engine/6000.0/script-reference/unityengine/uielements/visualelement/pickingmode.md)
* [VisualElement.name](/engine/6000.0/script-reference/unityengine/uielements/visualelement/name.md)
* [VisualElement.enabledInHierarchy](/engine/6000.0/script-reference/unityengine/uielements/visualelement/enabledinhierarchy.md)
* [VisualElement.enabledSelf](/engine/6000.0/script-reference/unityengine/uielements/visualelement/enabledself.md)
* [VisualElement.languageDirection](/engine/6000.0/script-reference/unityengine/uielements/visualelement/languagedirection.md)
* [VisualElement.visible](/engine/6000.0/script-reference/unityengine/uielements/visualelement/visible.md)
* [VisualElement.generateVisualContent](/engine/6000.0/script-reference/unityengine/uielements/visualelement/generatevisualcontent.md)
* [VisualElement.dataSource](/engine/6000.0/script-reference/unityengine/uielements/visualelement/datasource.md)
* [VisualElement.dataSourcePath](/engine/6000.0/script-reference/unityengine/uielements/visualelement/datasourcepath.md)
* [VisualElement.dataSourceType](/engine/6000.0/script-reference/unityengine/uielements/visualelement/datasourcetype.md)
* [VisualElement.experimental](/engine/6000.0/script-reference/unityengine/uielements/visualelement/experimental.md)
* [VisualElement.hierarchy](/engine/6000.0/script-reference/unityengine/uielements/visualelement/hierarchy-1.md)
* [VisualElement.parent](/engine/6000.0/script-reference/unityengine/uielements/visualelement/parent.md)
* [VisualElement.panel](/engine/6000.0/script-reference/unityengine/uielements/visualelement/panel.md)
* [VisualElement.contentContainer](/engine/6000.0/script-reference/unityengine/uielements/visualelement/contentcontainer.md)
* [VisualElement.visualTreeAssetSource](/engine/6000.0/script-reference/unityengine/uielements/visualelement/visualtreeassetsource.md)
* [VisualElement.this\[int\]](/engine/6000.0/script-reference/unityengine/uielements/visualelement/item.md)
* [VisualElement.childCount](/engine/6000.0/script-reference/unityengine/uielements/visualelement/childcount.md)
* [VisualElement.schedule](/engine/6000.0/script-reference/unityengine/uielements/visualelement/schedule.md)
* [VisualElement.style](/engine/6000.0/script-reference/unityengine/uielements/visualelement/style.md)
* [VisualElement.resolvedStyle](/engine/6000.0/script-reference/unityengine/uielements/visualelement/resolvedstyle.md)
* [VisualElement.customStyle](/engine/6000.0/script-reference/unityengine/uielements/visualelement/customstyle.md)
* [VisualElement.styleSheets](/engine/6000.0/script-reference/unityengine/uielements/visualelement/stylesheets.md)
* [VisualElement.tooltip](/engine/6000.0/script-reference/unityengine/uielements/visualelement/tooltip.md)
* [Focusable.Blur()](/engine/6000.0/script-reference/unityengine/uielements/focusable/blur.md)
* [Focusable.focusController](/engine/6000.0/script-reference/unityengine/uielements/focusable/focuscontroller.md)
* [Focusable.focusable](/engine/6000.0/script-reference/unityengine/uielements/focusable/focusable.md)
* [Focusable.tabIndex](/engine/6000.0/script-reference/unityengine/uielements/focusable/tabindex.md)
* [Focusable.delegatesFocus](/engine/6000.0/script-reference/unityengine/uielements/focusable/delegatesfocus.md)
* [Focusable.canGrabFocus](/engine/6000.0/script-reference/unityengine/uielements/focusable/cangrabfocus.md)
* [CallbackEventHandler.RegisterCallback\<T>(EventCallback\<T>, TrickleDown)](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/registercallback.md)
* [CallbackEventHandler.RegisterCallbackOnce\<T>(EventCallback\<T>, TrickleDown)](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/registercallbackonce.md)
* [CallbackEventHandler.RegisterCallback\<T, U>(EventCallback\<T, T>, T, TrickleDown)](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/registercallback.md)
* [CallbackEventHandler.RegisterCallbackOnce\<T, U>(EventCallback\<T, T>, T, TrickleDown)](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/registercallbackonce.md)
* [CallbackEventHandler.UnregisterCallback\<T>(EventCallback\<T>, TrickleDown)](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/unregistercallback.md)
* [CallbackEventHandler.UnregisterCallback\<T, U>(EventCallback\<T, T>, TrickleDown)](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/unregistercallback.md)
* [CallbackEventHandler.HasTrickleDownHandlers()](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/hastrickledownhandlers.md)
* [CallbackEventHandler.HasBubbleUpHandlers()](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/hasbubbleuphandlers.md)
* [CallbackEventHandler.HandleEventTrickleDown(EventBase)](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/handleeventtrickledown.md)
* [CallbackEventHandler.NotifyPropertyChanged(BindingId)](/engine/6000.0/script-reference/unityengine/uielements/callbackeventhandler/notifypropertychanged.md)