# DataChanged

Learn the syntax and arguments for the DataChanged event available in Spread for ASP.NET.

## Content

Occurs when the user changes the value of a cell.

## Syntax

[Inline HTML]

```html
<ELEMENT DataChanged = "handler" ...>
```

[JavaScript]

```javascript
FpSpread1.addEventListener("DataChanged", handler, ...)
```

or

```javascript
FpSpread1.onDataChanged = handler
```

## Arguments

***event.cell***
Cell whose value changed
***event.row***
Row index of cell
***event.col***
Column index of cell
***event.cellValue***
New value for the cell
***event.spread***
Spread that raises the event

## Return Type

None

## Remarks

This event is triggered when the user changes the value of a cell. The event uses as arguments the cell and its new value.

## Example

This example JavaScript code maps the event for the Spread on the client side.

```javascript
<script lang="javascript" type="text/javascript">
    window.onload = function () {
      var spread1 = document.getElementById("<%=FpSpread1.ClientID %>");
      if (document.all) {
        // IE
if (spread1.addEventListener) {
// IE9
spread1.addEventListener("DataChanged", dataChanged, false);
} else {
// Other versions of IE and IE9 quirks mode (no doctype set)
spread1.onDataChanged = dataChanged;
}
}
else {
// Firefox
spread1.addEventListener("DataChanged", dataChanged, false);
      }
    }
    
    function dataChanged(event) {
      alert("The data changed!");
    }
    
</script>
```

## See Also

[ActiveCellChanged](/spreadnet/docs/latest/online-asp/overview/spweb-clientscriptref/clientscript-members/clientscript-allevents/CSSR-onActiveCellChanged)
[SelectionChanged](/spreadnet/docs/latest/online-asp/overview/spweb-clientscriptref/clientscript-members/clientscript-allevents/CSSR-onSelectionChanged)
[Scripting Members](/spreadnet/docs/latest/online-asp/overview/spweb-clientscriptref/clientscript-members)