We use cookies to give you the best experience on our website. If you continue to browse, then you agree to our privacy policy and cookie policy. Image for the cookie policy date
Unfortunately, activation email could not send to your email. Please try again.
Syncfusion Feedback

Trusted by the world’s leading companies

Syncfusion Trusted Companies


The WinForms ComboBox (multiselect combobox) control allows users to type a value, choose an item, or choose multiple items using a multiselect option. Any UI control can be loaded as the header of the dropdown. Users can perform customized actions like search and filter in the dropdown. Its rich feature set includes autocomplete, sorting, watermark text, appearance customization, and more.

Data binding

The WinForms ComboBox has data binding support to work out-of-the-box with all the popular data sources like IEnumerable (IList, IBindingList, ObservableCollection, and more) and DataTable. It also supports sorting and filtering. Data can be shown based on the display member and value member. It also allows users to bind the data source at the designer level.

winforms combobox data binding illustration


  • The WinForms ComboBox provides support to select an item or multiple items from the dropdown.
  • Users can easily select multiple items by using the intuitive checkbox in the dropdown.
  • Supports multiple selection and a confirmation button in the dropdown. Also supports customization of the selected item’s appearance.

Autocomplete (filter by typing)

winforms combobox showing editing with suggestions in dropdown


  • Displays the list of items in the dropdown based on the typed text in the edit control.
  • Users can perform case-sensitive autocompletion.
  • Built-in support to suggest items using starts with or contains.

winforms combobox showing editing with appended text


  • Completes the user-typed word from the suggestion text to help users search for correct items easily.
  • Select an item from the dropdown list based on the appended word in the edit control.

winforms combobox showing editing with suggestion and appended text

Suggest and append

  • Combined operation of suggestion and append.
  • Users can perform case-sensitive autocompletion.
  • Completes a word that the user types based on the suggestion text and filters the suggestions. Users can choose an item from the filtered list.


  • Sort the items in the dropdown either in ascending or descending order.
  • Users can sort items by writing their own custom logic.

winforms combobox shows sorted data in descening order


The WinForms ComboBox allows users to filter data. Users can also filter items with their own custom logic.

winforms combobox shows filtered data


A watermark provides an additional hint to users about the data to be selected from the listed values.

winforms combobox shows watermark text

Appearance style

winforms combobox styling


Customize the appearance of the edit control and dropdown list.

  • Background color
  • Text color
  • Font and more.

winforms combobox conditional styling

Conditional styling

Customize the appearance of the dropdown list items based on the data.

winforms combobox shows image in dropdown

Image in dropdown

Users can load an image to each list item in the dropdown. Images can also be aligned with the text.

winforms combobox shows custom drawing in dropdown

Custom drawing

Supports making a custom drawing for every list item.

Customize the drop-down position to load the pop-up where needed.

winforms combobox dropdown position

Clear button

Show or hide the clear button, which is used to clear the editor value and selection.

winforms combobox clear button

Built-in themes

The WinForms ComboBox control provides Office 2016 built-in theme support to adapt the control to the rest of the business application. The following Office 2016 themes are supported:

  • Colorful
  • Black
  • Dark Gray
  • White

Office 2016 black theme in winforms combobox

Item height

Users can adjust (auto fit) the item height in the dropdown based on the content of the item to enhance readability. It is also possible to set the item height conditionally.

winforms combobox item height

  • Change the height and width of the dropdown.
  • Resize the dropdown dynamically using an intuitive resizing thumb.

winforms combobox dropdown sizing


Localize all the static default strings in the WinForms ComboBox to any desired language.

localization in winforms combobox

Right to left (RTL)

Supports right-to-left (RTL) direction for users working in right-to-left languages like Hebrew, Arabic, or Persian.

right to left mode in winforms combobox

UI Automation

The WinForms ComboBox control is compatible with Coded UI and UFT (formerly QTP) automation tools to automate applications.

winforms combobox ui automation illustration


Read independent,
authenticated reviews
on G2

Download Now Pricing

What do our customers say about us?

double quotes

Maxigig creates software to provide management information in the granite fabrication environment. Thanks to Syncfusion, we have saved around 300 hours of development time, enabling us to spend more time focusing on our company's core competencies by relegating common functionality to the Syncfusion libraries. We can achieve a higher level of professionalism in the products we offer.
Werner Sauer

Werner Sauer


double quotes

Working with your products, especially Windows Forms controls, is an important productivity gain for me.
Munteanu Gabriel

Munteanu Gabriel

Soft Data

Transform your applications today by downloading our free evaluation version Download Free Trial

Syncfusion Windows Forms Resoures


Greatness—it’s one thing to say you have it, but it means more when others recognize it. Syncfusion is proud to hold the following industry awards.

Up arrow icon

Warning Icon You are using an outdated version of Internet Explorer that may not display all features of this and other websites. Upgrade to Internet Explorer 8 or newer for a better experience.Close Icon

Live Chat Icon For mobile