Xamarin.Android, Syncfusion.SfPicker has missing UpdatePopup function

Question

I'm using Syncfusion.SfPicker for Xamarin.Android (https://help.syncfusion.com/xamarin-android/sfpicker/gettingstarted) and I'm using the latest version of the Syncfusion Nuget Library that contains the SfPicker.

My issue is that I receive the following error:

Object reference not set to an instance of an object, at Com.Syncfusion.SfPicker.SfPicker.UpdatePopup() [0x000d5] in :0 at Com.Syncfusion.SfPicker.SfPicker.set_IsOpen(System.Boolean value) [0x00018] in <4cccb4f208d9407ca543d91156e77529>:0 at MyTest_App.MainActivity.

When I execute following code in my MainActivity:

protected override void OnCreate(Bundle savedInstanceState)
{
    SfPicker picker = new SfPicker(this);
    base.OnCreate(savedInstanceState);
    picker.IsOpen = true;
    SetContentView(picker);
}

Is the documentation wrong/missing stuff, or am I simply doing it wrong? I followed the code from the last example of the URL I linked above.

Hopefully someone can shine some light on what's the issue is.

Answer 1

Is the documentation wrong/missing stuff, or am I simply doing it wrong? I followed the code from the last example of the URL I linked above.

You could refer to the Syncfusion Official Sample link, to avoid this exception, you must give your SfPicker a ItemsSource.

For example, create a ColorInfo class :

public class ColorInfo
{
    private ObservableCollection<string> _color;

    public ObservableCollection<string> Colors
    {
        get { return _color; }

        set { _color = value; }
    }

    public ColorInfo()
    {
        Colors = new ObservableCollection<string>();
        Colors.Add("Red");
        Colors.Add("White");
        Colors.Add("Orange");
        Colors.Add("Blue");
        Colors.Add("Purple");
        Colors.Add("Pink");
        Colors.Add("SkyBlue");
        Colors.Add("Yellow");
    }
}

Set ItemSource for your SfPicker :

SfPicker picker;
protected override void OnCreate(Bundle savedInstanceState)
{
    picker = new SfPicker(this);
    base.OnCreate(savedInstanceState);

    ColorInfo info = new ColorInfo();
    picker.ItemsSource = info.Colors;

    picker.IsOpen = true;
    SetContentView(picker);
}