ListView: [iOS] An exception occurs when LoadOnDemandMode is set to Automatic and there are no items initially in the collection

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Last Updated: 12 Sep 2024 14:30 by ADMIN

Created on: 30 May 2023 10:39

Category: ListView

Type: Bug Report

ListView: [iOS] An exception occurs when LoadOnDemandMode is set to Automatic and there are no items initially in the collection

The bug can be reproduced quite easily with the SDK examples. Choose any ListView example from the LoadOnDemand category that uses LoadOnDemandMode set to Automatic, e.g. ListView/LoadOnDemand/LoadOnDemandEvent. Remove the initial items from the ItemsSource:

public ViewModel()
{
    this.Source = new ObservableCollection<string>();
    //for (int i = 0; i < 14; i++)
    //{
    //    this.Source.Add(string.Format("Item {0}", i));
    //}
    this.LoadItemsCommand = new Command(this.LoadItemsCommandExecute);
}

Run the example to observe the exception almost immediately.

1 comment

ADMIN

Didi

Posted on: 12 Sep 2024 14:30

Hello Juan,

We have resolved this behavior by implementing a new control, CollectionView, which is a complete rewrite of the ListView from the ground up. CollectionView offers improved performance, enhanced features, and a modernized approach to managing lists of data. The CollectionView incorporates all key features of the ListView.

As this new control supersedes the ListView, this bug report will be closed. We recommend transitioning to CollectionView to take full advantage of its capabilities. Visit the following article that explains how to migrate to the new RadCollectionView.

Regards,
Didi
Progress Telerik