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Overview

The ComboBox control, or drop-down, is a text box component that allows users to type a value or choose an option from a list of predefined options. It has several out-of-the-box features, such as data binding, filtering, UI customization, and custom templates.


Editable and non-editable modes

In editable mode, the ComboBox control allows users to edit in the text box, and suggestions are shown in a drop-down list based on the input. Non-editable mode prevents users from typing and selecting items from the drop-down list.


Filtering

You can pick from various filtering options such as starts with, contains, and ends with. You can also pick whether to filter with or without case sensitivity.

Matching Text Highlight First Occurrence Support in ComboBox Control for Xamarin.Forms

First occurrence

The ComboBox control supports highlighting the matching text that occurs first.

Matching Text Highlight Multiple Occurrence Support in ComboBox Control for Xamarin.Forms

Multiple occurrence

The ComboBox control supports highlighting the matching text at every occurrence.

Perform Filtering When Needed with ComboBox Control

Perform filtering when needed

The ComboBox control starts offering matches as soon as users start typing. This feature can be changed by setting the number of characters required to start matching.


Autofill

The combobox component has an autofill option that completes the word that users type from the suggestion text, allowing end users to search for items easily. It can suggest a list of filtered items in a pop-up or append the rest of the suggested word in the input area. It can also append the matched item and display the list of filtered items suggested in the pop-up at the same time.


Pop-up placement

If the ComboBox control is at the bottom of the application where the default keyboard would appear, the pop-up can be placed at the top of the screen so that it won’t be covered up.

Pop-up Placement Options in ComboBox Control for Xamarin.Forms


Multiple selection

The input field has been designed to address scenarios such as email address bars. The ComboBox control allows users to select multiple items with token representation or simply divide them with a delimiter.

Multiple Selection with Token Representation Support in ComboBox Control for Xamarin.Forms

Token representation

Customizable token representation in the ComboBox control allows users to remove an item with its close button.

Delimiter Support in ComboBox Control for Xamarin.Forms

Delimiter

Selected items can be divided with desired characters such as “$” for dollar sign separation or “,” for traditional comma separation.


UI customization

The ComboBox control can be thoroughly customized in the following areas.

Custom Template Support in ComboBox Control for Xamarin.Forms

Custom template

The ComboBox control accepts a template for pop-ups to change the look and feel of the items.

Header View and Footer View of ComboBox Control for Xamarin.Forms

You can design your own header and footer for the pop-up list using the header and footer template.

Custom View in ComboBox Control for Xamarin.Forms

Custom view in text area

The ComboBox control accepts any custom view in place of the text box.

Appearance Customization with ComboBox Control for Xamarin.Forms

Appearance

By default, the appearance of the ComboBox control is designed to adopt native look and feel of the deployment platform, but it can be completely customized.

Color Customization with ComboBox Control for Xamarin.Forms

Color customization

The color of pop-ups and text can be customized to fit the application design.

Font Size Customization with ComboBox Control for Xamarin.Forms

Font size

The font size can be customized with pixel precision or with standard options such as small, medium, and large.

Font Family Customization with ComboBox Control for Xamarin.Forms

Font family

You are not limited to use only traditional fonts. You can use custom fonts that suit the application, and render certain iconic fonts too.


General information

The ComboBox control provides additional features that make it more user-friendly.

Clear Button in ComboBox Control for Xamarin.Forms

Clear button

A customizable clear button is available to clear all the text in a single tap. The button can be enabled or disabled.

Shows Hint Text Using Placeholder Support in ComboBox Control for Xamarin.Forms

Watermark

Watermark prompts users with an information hint when the search box is not in focus and contains an empty string.

MVVM with ComboBox Control for Xamarin.Forms

MVVM support

Every aspect of the combobox control has been designed with the MVVM pattern in mind.

Localization with ComboBox Control for Xamarin.Forms

Localization

All static text can be localized to the required language.

Object Binding

Use real-time object

Along with a list of strings, a real-time object can also be used to direct the search member to search and display.

Icons Binding

Bind icons

The pop-up list has a provision for placing an icon. A member can also be assigned to form the object.


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