Evening All,
Learning Xamarin forms..attempting to add a picker with numeric values...(using https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/picker/populating-itemssource)
I have used the example on this page to get the picker populated from the view...which works fine...however I want to populate the picker from code behind...
<---XAML--->
<Picker Grid.Column="4" Grid.Row="2" ItemsSource="{Binding pickerSource}"/>
<---c#---->
var pickerList = new List<string>();
pickerList.Add("1");
pickerList.Add("2");
pickerList.Add("3");
pickerList.Add("4");
pickerList.Add("5");
pickerList.Add("6");
pickerList.Add("7");
pickerList.Add("8");
pickerList.Add("9");
pickerList.Add("10");
var pickerSource = new Picker { Title = "Quantity", TitleColor = Color.Red };
pickerSource.ItemsSource = pickerList;
Picker is appearing on app but when selected, its not populated with any values...why isnt this binding properly anyone?
Thank you
Also...as a side note if anyone is aware of a tool that contains all numeric values instead of me manually having to populate it with 1,2,3 etc..
Thanks Again
Thanks to @Jason for the reply...From here I have went with the following:
---xaml--
<Picker Grid.Column="4" Grid.Row="2" ItemsSource="{Binding pickerSource}"/>
---c#----
public List<string> pickerSource { get; set; }
public void PopulateQuantityPicker()
{
var pickerList = new List<string>();
pickerList.Add("1");
pickerList.Add("2");
pickerList.Add("3");
pickerList.Add("4");
pickerList.Add("5");
pickerList.Add("6");
pickerList.Add("7");
pickerList.Add("8");
pickerList.Add("9");
pickerList.Add("10");
pickerSource = pickerList;
this.BindingContext = this;
}
The picker is on the app, but it is not populated, it is empty. When I Click on it I get the following:
(also the code is hitting the PopulateQuantityPicker())
here you are binding your ItemsSource to pickerSource
<Picker Grid.Column="4" Grid.Row="2" ItemsSource="{Binding pickerSource}"/>
in your code behind, you need a public property named pickerSource. You can only bind to public properties
public List<string> pickerSource { get; set }
// assign the data to your ItemsSource
pickerSource = pickerList;
// also be sure to set the BindingContext
BindingContext = this;
// this is creating a new picker named pickerSource. You have already done
// this in your XAML. This is NOT NEEDED
var pickerSource = new Picker { Title = "Quantity", TitleColor = Color.Red };
pickerSource.ItemsSource = pickerList;
if you want to do this from the code behind WITHOUT using binding, you first need to assign an x:name to your control
<Picker x:Name="myPicker" Grid.Column="4" Grid.Row="2" />
then in the code behind
myPicker.ItemsSource = pickerList;