Hello elvisvr,

If you want to cancel file uploading when file size limit is exceeded the best way to do it is this:

1. Set  "maxFileSizeLimit" setting in the web.config like this:

<appSettings>
    <add key="fileUploadPath" value="~/Uploads" />
    <add key="maxFileSizeLimit" value="1000000" />
</appSettings>

Reference: http://help.infragistics.com/NetAdvantage/jQuery/Current/CLR4.0/Help/NetAdvantage/jQuery/2011.2/CLR4.0/html/igUpload_Using_HTTP_Handler_and_Modules.html

2. Handle "onError" event on client and check the "ui.errorCode" property for the "File size exceeded" error (Note: error codes are numbers and 2 = "File size exceeded" error).

Example:

$("#igUpload").igUpload({
mode: 'multiple',
progressUrl: "/SamplesBrowser/IGUploadStatusHandler.ashx",
controlId: "serverID1",
onError: function (evt, ui) {
            /* check for "File size exceeded" error*/
if (ui.errorCode === 2)
{
alert("File size exceeded!");
}
}
});
});

If you have other use case then you should use "cancelUpload" method in the proper event (where you have enough information to do your validation checks).

Example:

$(".selector").igUpload("cancelUpload", 1);

Note that the earliest place you have information about file size is "fileUploading" event, but on this stage file uploading has started so there is no guarantee that file won't be uploaded (if the file is small) and other events will be fired.

Hope this helps,

Martin Pavlov

Infragistics, Inc.