# Maui Collectionview

> >

- **Type:** Skill
- **Install:** `agentstack add skill-davidortinau-maui-skills-maui-collectionview`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [davidortinau](https://agentstack.voostack.com/s/davidortinau)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [davidortinau](https://github.com/davidortinau)
- **Source:** https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-collectionview

## Install

```sh
agentstack add skill-davidortinau-maui-skills-maui-collectionview
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# CollectionView – .NET MAUI

Use `CollectionView` for displaying scrollable lists and grids of data.
It replaces `ListView` and offers better performance, flexible layouts, and no `ViewCell` requirement.

## Essential patterns

### Basic setup

```xml

    
        
            
                
                
            
        
    

```

- Bind `ItemsSource` to an `ObservableCollection` so the UI updates on add/remove.
- Each item template root must be a `Layout` or `View` — **never use `ViewCell`**.
- Always set `x:DataType` on `DataTemplate` for compiled bindings.

### SwipeView — binding from inside DataTemplate

Commands inside a `DataTemplate` can't directly reach your ViewModel. Use `RelativeSource AncestorType`:

```xml

```

### Pull-to-refresh

Wrap `CollectionView` in a `RefreshView`. Set `IsRefreshing` back to `false` when done:

```xml

    

```

### Incremental loading (infinite scroll)

```xml

```

> ⚠️ **Do NOT use with StackLayout-based ItemsLayout** — it has no virtualization and triggers infinite threshold-reached events. Always use `LinearItemsLayout` or `GridItemsLayout`.

## Performance tips

- **Use `MeasureFirstItem`** for uniform item sizes — significantly faster than the default `MeasureAllItems`:
  ```xml
  
  ```
- **Always use `ObservableCollection`**, not `List`. Swapping a `List` forces a full re-render.
- **Update collections on the UI thread** — `MainThread.BeginInvokeOnMainThread(() => Items.Add(item))`.

## Common gotchas

| Issue | Fix |
|---|---|
| UI doesn't update when items change | Use `ObservableCollection`, not `List`. |
| App crashes or blank items | **Never use `ViewCell`** — use `Grid`, `StackLayout`, or any `View` as template root. |
| Items disappear or layout breaks | Always update `ItemsSource` and the collection on the **UI thread** (`MainThread.BeginInvokeOnMainThread`). |
| Incremental loading fires endlessly | Don't use `StackLayout` as layout; use `LinearItemsLayout` or `GridItemsLayout`. |
| EmptyView doesn't render correctly | Wrap custom empty views in `ContentView`. |
| Poor scroll performance | Use `MeasureFirstItem` sizing strategy for uniform item sizes. |
| Selected state not visible | Add `VisualState Name="Selected"` to the item template root element. |
| Binding errors in SwipeView commands | Use `RelativeSource AncestorType` to reach the ViewModel from inside the item template. |

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [davidortinau](https://github.com/davidortinau)
- **Source:** [davidortinau/maui-skills](https://github.com/davidortinau/maui-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-davidortinau-maui-skills-maui-collectionview
- Seller: https://agentstack.voostack.com/s/davidortinau
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.