CODEWITHSUNDEEP
c#windows-phone-8toolkitselectedindexlistpicker
Gibbsnich
Gibbsnich

Reputation: 33

SelectedItem in Win 8 Phone ListPicker is not shown

I use some ListPicker to manage my apps settings. As I can see in when using a breakpoint in OnNavigatedTo(), the SelectedIndex is always set to the correct value, but when the dialog is shown, all ListPicker show the first item.

When I popup a LictPicker, then the correct item is highlighted and also saved correctly when the dialog is closed.

The Definition in XAML:

<toolkit:ListPicker x:Name="ListPickHybrid" Margin="0,0, 0, 0" 
  SelectedIndex="{Binding HybridSetting, Mode=TwoWay, Source={StaticResource appSettings}}" BorderBrush="White" >
    <toolkit:ListPickerItem Content="Nur Online" />
    <toolkit:ListPickerItem Content="Immer offline" />
    <toolkit:ListPickerItem Content="Automatisch" />
</toolkit:ListPicker>

And here is the code:

public int HybridSetting {
    get {
        int val = GetValueOrDefault<int>(BIS_Common.SETTINGS_HYBRIDMODUS, (int)HybridModus.Hybrid_Undefined);
         return val;
    }
    set {
        if (AddOrUpdateValue(BIS_Common.SETTINGS_HYBRIDMODUS, value)) {
            HybridModus status = (HybridModus) value;
            if (status != HybridModus.Hybrid_Undefined)
                BIS_Common.settingHybridStatus = status;
            Save();
        }
    }
}

But when I make some nonsens as:

try { ListPickHybrid.SelectedIndex = 99; }
catch (Exception) { }

In the OnNavigatedTo() the exception is thrown and then the ListPicker shows the correct Item !!

It makes no sense to me, that changing the SelectedIndex to an not existing value, brings me to the achieved goal. What else can I do, to make ListPicker shows the selected item after starting up?

Upvotes: 0

Views: 166

Answers (2)

nmilcoff
nmilcoff

Reputation: 1084

I'm facing the same Issue right now... Just in case anybody runs needs it, I have found another crude workaround:

Before the ItemSource is populated:

this.YourPicker.Visibility = System.Windows.Visibility.Collapsed;

After the ItemSource is populated:

this.YourPicker.Visibility = System.Windows.Visibility.Visible;

Upvotes: 2

GummyBearScientist
GummyBearScientist

Reputation: 1

This is a crude workaruond but try using the "open()" method on the listpicker after it has been populated with items and the "SelectedItemIndex" has been set.

ListPickHybrid.open();

Upvotes: 0

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