---
id: "T:cAlgo.API.ComboBoxSelectedItemChangedEventArgs"
kind: "class"
namespace: "cAlgo.API"
url: "https://help.ctrader.com/ctrader-algo/references/EventArgs/ComboBoxSelectedItemChangedEventArgs/"
---

> Documentation index for agents: https://help.ctrader.com/ctrader-algo/llms.txt · machine index: https://help.ctrader.com/ctrader-algo/api.json

# ComboBoxSelectedItemChangedEventArgs (class)

Provides data for ComboBox SelectedItemChanged event handlers

Environments: Desktop supported · CLI not supported · Cloud not supported.

- CLI: Never raised in the CLI: the events that pass it never fire there (ComboBox.SelectedItemChanged).
- Cloud: Never raised in the cloud: the events that pass it never fire there (ComboBox.SelectedItemChanged).

## Definition

```csharp
public class ComboBoxSelectedItemChangedEventArgs
```

## Examples

C#:

```csharp
protected override void OnStart()
{
    var comboBox = new ComboBox();
    comboBox.AddItem("EURUSD");
    comboBox.AddItem("GBPUSD");
    comboBox.SelectedItemChanged += OnComboBoxSelectedItemChanged;
    Chart.AddControl(comboBox);
}

private void OnComboBoxSelectedItemChanged(ComboBoxSelectedItemChangedEventArgs args)
{
    Print("Selected item: {0}, index: {1}", args.SelectedItem, args.ComboBox.SelectedIndex);
}
```

Python:

```python
def on_start(self):
    comboBox = ComboBox()
    comboBox.AddItem("EURUSD")
    comboBox.AddItem("GBPUSD")
    comboBox.SelectedItemChanged += self.on_combo_box_selected_item_changed
    api.Chart.AddControl(comboBox)

def on_combo_box_selected_item_changed(self, args):
    api.Print(f"Selected item: {args.SelectedItem}, index: {args.ComboBox.SelectedIndex}")
```

## Properties

- `public ComboBox ComboBox {get;}` — The ComboBox that it is selected item changed [details](https://help.ctrader.com/ctrader-algo/references/EventArgs/ComboBoxSelectedItemChangedEventArgs/ComboBox/index.md)
- `public string SelectedItem {get;}` — The new selected item of ComboBox [details](https://help.ctrader.com/ctrader-algo/references/EventArgs/ComboBoxSelectedItemChangedEventArgs/SelectedItem/index.md)