Xamal中的Xamarin Forms Picker项目源绑定

Question

I need to create states picker in my Xamarin Forms. I am using Xaml file for creating views.

Can any one help me to bind Picker in Xaml with item source?

Answer 1

The XLabs has an excellent example of a bindable picker that I have used in several projects to great affect:

https://github.com/XLabs/Xamarin-Forms-Labs

This will allow you to replicate the 'ItemsSource' functionality of the Listview.

Answer 2

You won't be able to do this in XAML, as you can see here .

You'll have to load the data up in the code behind, using either their regular API, or something like this .

You can also serialize your list as a JSON or preferred format, and deserialize that and pass it to the Picker .

Answer 3

This functionality did not previous exist, but it was recently added to the regular Xamarin.Forms Picker via the new ItemsSource and SelectedItem properties. It is currently in the pre-release NuGet package for version 2.3.4-pre1 , but should be in the stable 2.3.4+ versions once it is released.

Answer 4

As JordanMazurke commented, XLabs has it. Here is an example:

<ContentPage x:Class="XLabs.Samples.Pages.Controls.ExtendedPickerPage"
         xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         xmlns:controls="clr-namespace:XLabs.Forms.Controls;assembly=XLabs.Forms"
         Title="Picker">
<ContentPage.Content>
    <StackLayout x:Name="myStackLayout">
        <Label Text="Xaml:" />
        <controls:ExtendedPicker x:Name="myPicker"
                                 DisplayProperty="FirstName"
                                 ItemsSource="{Binding MyDataList}"
                                 SelectedItem="{Binding TheChosenOne}" />
    </StackLayout>
</ContentPage.Content>