Fix the ListView scroll position center and end without animation

[Shalini-Ashokan]

Issue Details

The ListView.ScrollTo method fails to correctly scroll the selected item to the center or end of the ListView on the Windows platform. Instead, the scroll position always remains at the start and does not align the SelectedItem with the center or end of the list, especially when using it without animation.

Root Cause

The scroll position is reset before scrolling the ListView item (center or end) when using it without animation.

Description of Change

Scroll the ListView item (center or end) before resetting the scroll position value.

Validated the behavior in the following platforms

• Android
• Windows
• iOS
• Mac

Issues Fixed

Fixes #26945

Output ScreenShot

Before	After
BeforeFixWithoutAnimation.mp4	AfterFixWithoutAnimation.mp4

[dotnet-policy-service]

Hey there @Shalini-Ashokan! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[Shalini-Ashokan]

@dotnet-policy-service agree company="Syncfusion, Inc."

[jfversluis]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (2)

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue26945.cs:18

• The test method name Issue26945_SelectItemPositionStart is inconsistent with the other test method names. It should be renamed to Issue26945Test_SelectItemPositionStart.

public void Issue26945_SelectItemPositionStart()

src/Controls/tests/TestCases.HostApp/Issues/Issue26945.cs:6

• The class name 'Issue26857' appears to be a typo. It should be renamed to 'Issue26945' to match the issue being addressed.

public class Issue26857 : ContentPage