Answers

• ColeX Member, Xamarin Team Xamurai

  May 2020

  I have no idea how to add the Binding Command to one specific ListView Item, or how to change the code so that a Binding Command is not needed.

  If we want to remain the logic in command ,what we should do

  1. Create a button in listview.item and binding Command on it .

  2. Inside command function implement different logic depends on the index in the itemsource .

  It is a bit complex, i suggest you remove Command and move the logic into ItemTapped event .

  Xaml

      <ListView x:Name="listView">
          <ListView.ItemTemplate>
              <DataTemplate>
                  <ViewCell>
                      <StackLayout >
                          <Label Text="{Binding Result}" />
                      </StackLayout>
                  </ViewCell>
              </DataTemplate>
          </ListView.ItemTemplate>
      </ListView>
  

  Code behind

  public class CameraModel
      {
          private string _result;
  
          public string Result
          {
              get
              {
                  return _result;
              }
              set
              {
                  if(_result != value)
                  {
                      _result = value;
                  }
              }
          }
      }
  
      [XamlCompilation(XamlCompilationOptions.Compile)]
      public partial class Page2 : ContentPage
      {
          List<CameraModel> List { get; set; }
  
          public Page2()
          {
              InitializeComponent();
  
              List = new List<CameraModel>();
  
              for(int i = 0; i < 5; i++)
              {
                  List.Add(new CameraModel {Result = ("Text"+(i+1).ToString()) });
              }
  
              listView.ItemsSource = List;
          }
  
          private void ListView_ItemTapped(object sender, ItemTappedEventArgs e)
          {
              int index = e.ItemIndex;
  
              if(index == 3)
              {
                  //show alert
              }
              else if (index == 5)
              {
                  //open camera
              }
          }
      }
  

  0
• ganesh96 Member ✭✭✭

  May 2020

  Hi ColeX,

  Thanks for the response.

  I think I didn't explain my issue well enough. I'm sorry for that. Please look at the code example in the attachment (I made this example for Android). This is a RAR-file, because ZIP was too large.

  You can see the button for opening the camera, including asking for permissions. Now I want to remove this button and open the camera when I tap on Text3 in the ListView. I have no idea how to do that.

  I hope my issue is clear now.

  Regards, Ganesh

  CameraIssue.rar 48.4M

  0
• ColeX Member, Xamarin Team Xamurai

  May 2020 Accepted Answer

  CameraModel is no need any more , move the logic into Page ,check my sample below .

  ---

  Deleting bin and obj folder would decrease the attachment size .

  CameraIssue.zip 426.3K

  5