---
id: "E:cAlgo.API.DateTimePicker.ValueChanged"
kind: "event"
type: "T:cAlgo.API.DateTimePicker"
url: "https://help.ctrader.com/ctrader-algo/references/Controls/DateTimePicker/ValueChanged/"
---

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

# DateTimePicker.ValueChanged

Member of [DateTimePicker](https://help.ctrader.com/ctrader-algo/references/Controls/DateTimePicker/index.md).

## ValueChanged

Occurs when value is changed.

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

- CLI: Accepted without error but never displayed, so control events such as Click are never raised.
- Cloud: Accepted without error but never displayed, so control events such as Click are never raised.

C#:

```csharp
public event Action<DateTimePickerValueChangedEventArgs> ValueChanged;
```

Python:

```python
dateTimePicker.ValueChanged += handler  # handler(obj: DateTimePickerValueChangedEventArgs)
```

### Returns

`Action<DateTimePickerValueChangedEventArgs>` — 

Available since cAlgo.API 5.5.

### Examples

C#:

```csharp
var dateTimePicker = new DateTimePicker { Value = Server.Time };
dateTimePicker.ValueChanged += args => Print("Value changed from {0} to {1}", args.OldValue, args.NewValue);
Chart.AddControl(dateTimePicker);
```

Python:

```python
def on_start(self):
    dateTimePicker = DateTimePicker()
    dateTimePicker.Value = api.Server.Time
    dateTimePicker.ValueChanged += self.on_value_changed
    api.Chart.AddControl(dateTimePicker)

def on_value_changed(self, args):
    api.Print(f"Value changed from {args.OldValue} to {args.NewValue}")
```