I would like you to help me solve a problem that I can not deal with.
In my Xamarin.Forms application, the user can add to the SQLite database:
public class Car
{
[PrimaryKey, AutoIncrement]
public int ID { get; set; }
public string Text { get; set; }
public int PickerValue { get; set; }
}
PickerValue is of type INT because I think that the selected value of the picker gives the index INT value. Am I wrong?
The user adds item using:
<Editor Placeholder="Enter name" Text="{Binding Text}" />
<Picker x:Name="myPicker" Title="Value:">
<Picker.ItemsSource>
<x:Array Type="{x:Type x:String}">
<x:String>value 1</x:String>
<x:String>value 2</x:String>
</x:Array>
</Picker.ItemsSource>
</Picker>
On another page, items are displayed using ListView:
<Label Text="{Binding Text}"/>
<Label Text="{Binding PickerValue}"/>
When I select an item on the ListView - the edit page opens for me - the same page in which I added new products (code above) with filled fields from the database. I can edit them there.
I would like to be able to save the selected Picker value to SQLite, and on another page I can display it (or index of the selected value). Can someone help me how to make such a binding?
If it is possible - I would like to do it in XAML.
I made the project based on: https://docs.microsoft.com/pl-pl/xamarin/get-started/quickstarts/database?pivots=windows
Here is my running GIF.
You can directly set this picker.
Firstly, I add a property in the model, here is add a Gender property.
public class Note
{
[PrimaryKey, AutoIncrement]
public int ID { get; set; }
public string Text { get; set; }
public DateTime Date { get; set; }
public string Gender { get; set; }
}
Before you insert the data to your database, you should set this property like this code.You should convert the myPicker.SelectedItem;
to string
async void OnSaveButtonClicked(object sender, EventArgs e)
{
var note = (Note)BindingContext;
note.Date = DateTime.UtcNow;
note.Gender = (string)myPicker.SelectedItem;
await App.Database.SaveNoteAsync(note);
await Navigation.PopAsync();
}
In the other page, we just binding the Gender property, like this code.
<ListView x:Name="listView"
Margin="20"
ItemSelected="OnListViewItemSelected">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout>
<Label Text="{Binding Text}"></Label>
<Label Text="{Binding Gender}"></Label>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
Here is my demo.
https://github.com/851265601/databaseDemo
Update There is GIF about change the text of the edit page, it works normally.
I just add the SelectedItem of picker,
<Picker x:Name="myPicker" Title="Value:" SelectedItem="{Binding Gender}">
<Picker.ItemsSource>
<x:Array Type="{x:Type x:String}">
<x:String>female</x:String>
<x:String>male</x:String>
</x:Array>
</Picker.ItemsSource>
</Picker>
I update again for my project. https://github.com/851265601/Datademo3/blob/master/Datademo2/Notes/App.xaml.cs
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