How to to clear the data in ListView

Question

How to to clear the data in ListView

Thombre, Ashish 130

i am using ListView.ItemsSource = null; to clear the Listview item but items from list not able to clear/delete/refresh.

but when click/tap on list item second time then only item clearing/refreshing.

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2023-12-18T06:24:22.4666667+00:00

What's the MAUI version? And on which platform do you meet this issue?

I tested with the official listview sample, and named the ListView "ListView" (<ListView x:Name ="ListView" ItemsSource="{Binding Monkeys}">), then clear the data by

ListView.ItemsSource = null， all items will disappear immediately. I cannot reproduce your issue.

For further investigation, would you mind sharing more code snippets about the ListView and how you set the BindingContext and ItemSource?

Thombre, Ashish 130

I am using <TargetFrameworks>net7.0-android</TargetFrameworks> for android platform.

Below is the Listview Code

 <ListView x:Name="ServiceEquipmentRequestLineItemsList"  Margin="0,0,0,0"
   Style="{StaticResource listStyle}"
   ItemsSource="{Binding ServiceEquipmentRequestLineItemsList}" 
   VerticalOptions="FillAndExpand"
    HasUnevenRows="true"
    CachingStrategy="RecycleElement"
    SeparatorVisibility="None"
           IsVisible="True">

ServiceEquipmentRequestLineItemsList.ItemsSource = null;

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2023-12-19T09:21:04.6666667+00:00

I still cannot reproduce your issue with the code snippets you provided. Is the listView in a ContentView? Could you provide more code snippets about the XAML and ViewModel?
Thombre, Ashish 130 Reputation points

2023-12-19T16:14:00.61+00:00

ListView is inside a tabbedpage - content page
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2023-12-21T09:25:21.9533333+00:00
Is there a scrollview or other layout in the content page? Please try to add a <VrticalStackLayout> to wrap the Listview.

<VerticalStackLayout VerticalOptions="Center"> <ListView ...> </ListView> </VerticalStackLayout>

(I reproduced your problem. The problem occurs if the content page contains a scroll view and a list view and is not the first tab.)
Thombre, Ashish 130 Reputation points

2023-12-22T05:05:09.91+00:00

Thanks, works above solution for me.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2023-12-22T05:34:47.8533333+00:00

You are welcome. Since it works for you, I made an answer, you could view it.

Accepted answer

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Your answer

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2023-12-18T06:24:22.4666667+00:00

What's the MAUI version? And on which platform do you meet this issue?

I tested with the official listview sample, and named the ListView "ListView" (<ListView x:Name ="ListView" ItemsSource="{Binding Monkeys}">), then clear the data by

ListView.ItemsSource = null， all items will disappear immediately. I cannot reproduce your issue.

For further investigation, would you mind sharing more code snippets about the ListView and how you set the BindingContext and ItemSource?
Thombre, Ashish 130 Reputation points

2023-12-18T11:34:31.6566667+00:00

I am using <TargetFrameworks>net7.0-android</TargetFrameworks> for android platform.

Below is the Listview Code

<ListView x:Name="ServiceEquipmentRequestLineItemsList" Margin="0,0,0,0" Style="{StaticResource listStyle}" ItemsSource="{Binding ServiceEquipmentRequestLineItemsList}" VerticalOptions="FillAndExpand" HasUnevenRows="true" CachingStrategy="RecycleElement" SeparatorVisibility="None" IsVisible="True">

ServiceEquipmentRequestLineItemsList.ItemsSource = null;
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2023-12-19T09:21:04.6666667+00:00

I still cannot reproduce your issue with the code snippets you provided. Is the listView in a ContentView? Could you provide more code snippets about the XAML and ViewModel?
Thombre, Ashish 130 Reputation points

2023-12-19T16:14:00.61+00:00

ListView is inside a tabbedpage - content page
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2023-12-21T09:25:21.9533333+00:00

Is there a scrollview or other layout in the content page? Please try to add a <VrticalStackLayout> to wrap the Listview.

<VerticalStackLayout VerticalOptions="Center"> <ListView ...> </ListView> </VerticalStackLayout>

(I reproduced your problem. The problem occurs if the content page contains a scroll view and a list view and is not the first tab.)
Thombre, Ashish 130 Reputation points

2023-12-22T05:05:09.91+00:00

Thanks, works above solution for me.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2023-12-22T05:34:47.8533333+00:00

You are welcome. Since it works for you, I made an answer, you could view it.

Answer 1

Hello,

Please try to add a <VrticalStackLayout> to wrap the Listview.

<VerticalStackLayout
      VerticalOptions="Center">
      <ListView ...>
      </ListView>


  </VerticalStackLayout>

Best Regards,

Wenyan Zhang

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How to to clear the data in ListView

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