xamarin/Xamarin.Forms

RecycleElement, GroupHeaderTemplate and DataTrigger display incorrectly

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#4,045 opened on Oct 9, 2018

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a/listviewe/5 :clock5:help wantedi/highinactivep/Androidt/bug :bug:up-for-grabs

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Description

Description

Steps to Reproduce

  1. Bind a grouped list view to a list of groups, with custom group and item templates which use triggers based on the data.
  2. Set the caching strategy to recycle elements.

Expected Behavior

All elements are displayed correctly.

Actual Behavior

Some elements are not displayed correctly.

Basic Information

  • Version with issue: Latest
  • Last known good version: None

Contributor guide

Research direction
Investigate the ListView's recycling mechanism and how DataTriggers are applied to headers and items. Check if the DataTrigger states are properly reset when elements are recycled.
Tech stack
csharp
Domain
mobile
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitC#Xamarin.Forms
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70