Cayla  Erdman

Cayla Erdman


How to Create Custom Renderers for a Control in Xamarin.Forms

Xamarin.Forms uses a common API to render cross-platform mobile UIs. Therefore, the components can be rendered differently on each platform, using a renderer class. This renderer class creates a native control and translates the properties of the Xamarin.Forms control to it.

Custom renderers are used to ensure a consistency of appearance in elements across platforms for Xamarin controls like style, background color, text format, and so on.

Xamarin.Forms uses abstractions to define these elements. Then, it transforms each abstraction, offering an implementation and mechanism to each platform.

In this article, I will explain how to customize the TimePicker control with a Placeholder property to display text, since the Xamarin.Forms control does not come with this customization property.

Luckily, the native controls of Android and iOS do have this property. Therefore, we only have to extend the existing TimePicker control and create a renderer for each platform.

Let’s get started!

Extending the existing TimePicker

We will start by creating a control that inherits the Xamarin.Forms TimePicker. Then, we’ll add the desired new Placeholder property. For this, we must first create a new folder called Controls and a class named CRTimePicker inside it.

Refer to the following code.

`**using**` `Xamarin.Forms;`

`**namespace**` `TImePicker_Render.Controls`


`**public**` `**class**` `CRTimePicker : TimePicker`


`**public**` `**static**` `**readonly**` `BindableProperty EnterTextProperty =`

`BindableProperty.Create(propertyName: nameof(Placeholder), returnType:` `**typeof**``(``**string**``), declaringType:` `**typeof**``(TimePicker), defaultValue:` `**default**``(``**string**``));`

`**public**` `**string**` `Placeholder {` `**get**``;` `**set**``; }`



The TimePicker control will be added in the view where we want to display it. For didactic reasons, I will implement it in the following way in my MainPage file.

`<?``**xml**` `version``=``"1.0"` `encoding``=``"utf-8"``?>`

`<?``**xml**` `version``=``"1.0"` `encoding``=``"utf-8"``?>`

`<``**ContentPage**` `xmlns``=``""`





`mc:Ignorable``=``"d"` `x:Class``=``"TImePicker_Render.MainPage"``>`

`<``**StackLayout**` `VerticalOptions``=``"Center"``>`

`<``**Label**` `Text``=``"TimePicker with Placeholder"`


`<``**controls:CRTimePicker**` `Placeholder``=``"Hora de Inicio"`




Now, we must create the renderer on each platform. In this example, we will be using the Visual Material, and therefore we have to inherit the renderer from the MaterialTimePickerRenderer class.

#mobile #user interface #xamarin #android #ios #timepicker

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Buddha Community

How to Create Custom Renderers for a Control in Xamarin.Forms

How to Design Login Page using Xamarin Forms C# | Login Form | Sign In UI Design


#xamarin forms #xamarin forms bangla tutorials for beginners #xamarin forms tutorials for beginners #xamarin #xamarin.forms #xamarin.forms ui

Gaurav Singh


Xamarin Forms Training Institute | Xamarin Forms Development Classes | Xamarin Training

In this Xamarin Online course, you will learn each and every topic with the help of hands-on labs. This program includes a hands-on live project with the implementation of recommended design patterns and practices. The learning path for this program is given below:
Xamarin Training objective
At the completion of this course, attendees will be able to;

  1. Understand Xamarin architecture
  2. Understand Xamarin .Android, Xamarin. iOS fundamentals
  3. Understand Xamarin. Forms fundamentals
  4. Build UI with XAML and code
  5. Work with images, display data beautifully and create interactive lists
  6. Implement multi-page apps with navigation, tabs, master/detail pages
  7. Store and retrieve data from a variety of sources like file system, SQLite database and RESTful services
  8. Implement MVVM pattern

#xamarin training #xamarin course #xamarin forms course #xamarin online course #xamarin forms training #xamarin training course

How to use Picker in Xamarin Forms | ComboBox | Dropdown | DropdownList


#xamarin forms #xamarin #xamarin.forms #xamarin tutorials #xamarin tutorials for beginners

Cayla  Erdman

Cayla Erdman


Xamarin.Forms 5 Preview: Advanced UI Controls for Beautiful Apps

Xamarin.Forms 5 brings to stable release features that you have seen in preview over the latest several 4.x releases. This includes solid and gradient BrushesCarouselView, drag-and-drop, RadioButtonShapes, and SwipeView. These new features inject new creative potential for your application designs to create beautiful, interactive experiences.

Let’s look at those highlights, and then a quick checklist of what you should review as you get started with the Xamarin.Forms 5 pre-release.

Beautiful Design with Brushes, Shapes, and Paths

With brushes you can now easily paint gradients anywhere you need them. Shapes and paths allow you to draw all the rounded corners and even oddly shaped parts of your UI by using the platform graphics APIs which adds no size to your final applications. You can use geometries to clip any visual element, which makes it very easy to get the highly sought-after circle image.

Image of two apps with custom shapes and gradients

For more information, check out the brushes documentationshapes documentationblog for shapes and paths, and the blog introducing brushes.

#developers #xamarin #xamarin.forms #carouselview #control templating #gradients #paths #preview #shapes #xamarin.forms 5

Setting up Mobile Development Environment for Xamarin Forms in Visual Studio 2019


#xamarin forms #xamarin forms tutorial for beginners #xamarin forms with c# #xamarin