# LoadRowsStart

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

## Content

Occurs when rows start loading with the background load on demand.

## Syntax

[Inline HTML]

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

[JavaScript]

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

or

```javascript
FpSpread1.onLoadRowsStart = handler
```

## Arguments

***event.cancel***
Boolean, whether to stop loading rows
***event.spread***
Spread that raises the event

## Return Type

None

## Remarks

This event is triggered when the user scrolls and causes the next set of rows to load.

## Example

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

```javascript
window.onload = function () {
        var spread1 = document.getElementById("<%=FpSpread1.ClientID %>");
        if (document.all) {
            // IE
            if (spread1.addEventListener) {
                // IE9
                spread1.addEventListener("LoadRowsStart", loadStart, false);
                spread1.addEventListener("LoadRowsStopped", loadStop, false);
            } else {
                // Other versions of IE and IE9 quirks mode (no doctype set)
                spread1.onLoadRowsStart = loadStart;
                spread1.onLoadRowsStopped = loadStop;
            }
        } else {
            // Firefox
            spread1.addEventListener("LoadRowsStart", loadStart, false);
            spread1.addEventListener("LoadRowsStopped", loadStop, false);
        }
    }  
   
    function loadStart(event) {
      alert("start");
  }
  function loadStop(event) {
      alert("stopped");
  }
```

## See Also

[LoadRowsStopped](/spreadnet/docs/latest/online-asp/overview/spweb-clientscriptref/clientscript-members/clientscript-allevents/CSSR-onLoadRowsStopped)
[CallBackStopped](/spreadnet/docs/latest/online-asp/overview/spweb-clientscriptref/clientscript-members/clientscript-allevents/CSSR-onCallBackStop)
[Scripting Members](/spreadnet/docs/latest/online-asp/overview/spweb-clientscriptref/clientscript-members)