CODEWITHSUNDEEP
c#wpfmvvm
Usman Ali
Usman Ali

Reputation: 818

search value in listview itemsource by index number wpf mvvm

I'm using Wpf MVVM, if i know the index number of item/row then how can i search the value in listview/itemsource by specific index number.

Note: i can get index number, index number will already be known.

below is the xaml code for listview

<ListView                       
    Grid.Row="1"
    ItemContainerStyle="{StaticResource FileItemStyle}"
    ItemsSource="{Binding BarCode, IsAsync=True}"
    ScrollViewer.HorizontalScrollBarVisibility="Disabled"
    SelectedIndex="{Binding SelectedIndex}"
    SelectedItem="{Binding SelectBarCode, 
    UpdateSourceTrigger=PropertyChanged}"
    SelectionMode="Single"
    Style="{StaticResource ListItemsMain}"

and ObservableCollection for itemsource

 private ObservableCollection<BarCodeModel> mBarCode = null;
 public ObservableCollection<BarCodeModel> BarCode
    {
        get
        {
            mBarCode = mBarCode ?? new ObservableCollection<BarCodeModel>();
            return mBarCode;
        }
    }

and below code is for model

public class BarCodeModel
{
    public int BarCodeEntry_ID { get; set; }
    public string BarCodeEntry_Title { get; set; }

and below is the command where i want to put my logic

private ICommand mSearchValueByIndexNumberCommand;
public ICommand SearchValueByIndexNumberCommand
    {
        get
        {
            if (mSearchValueByIndexNumberCommand == null)
            {
                mSearchValueByIndexNumberCommand = new DelegateCommand(delegate ()
                {
                    // search BarCodeEntry_ID in BarCode where SelectedIndex is 5 (or other value)

                });
            }
            return mSearchValueByIndexNumberCommand;
        }
    }

Upvotes: 0

Views: 947

Answers (2)

vasily.sib
vasily.sib

Reputation: 4002

As in your XAML you bind your ListView.ItemsSource to BarCode of your ViewModel, but also bind ListView.SelectedItem and ListView.SelectedIndex to SelectBarCode and SelectedIndex, now, when you select some Item in a ListView, it (ListView) will update values of SelectBarCode and SelectedIndex in your ViewModel.

So, you can access your current selection with SelectBarCode or BarCode[SelectedIndex].

Upvotes: 2

Usman Ali
Usman Ali

Reputation: 818

Below is answer to my question, a special thanks to @vasily.sib 

private ICommand mSearchValueByIndexNumberCommand;
public ICommand SearchValueByIndexNumberCommand
{
    get
    {
        if (mSearchValueByIndexNumberCommand == null)
        {
            mSearchValueByIndexNumberCommand = new DelegateCommand(delegate ()
            {
               int BarCodeId = BarCode[SelectedIndex].BarCodeEntry_ID;

            });
        }
        return mSearchValueByIndexNumberCommand;
    }
}

Upvotes: 0

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