Hello Aidan,

Sorting respects the column data type. If you provide numericals as strings then they will be sorted as strings. If you want the values sorted as numericals then you need to provide them to the igGrid as numericals and format them in the igGrid column formatter.

Here is an example:

var data = [{col1: "99", col2: 99}, {col1: "987,654", col2: 987.654}, {col1: "98", col2: 98}];
$("#grid1").igGrid({
	columns: [
		{ headerText: "col1", key: "col1", dataType: "string", width: "100px"},
		{ headerText: "col2", key: "col2", dataType: "number", width: "200px", formatter: function (val) {return val.toLocaleString("de");}}
	],
	dataSource: data,
	features: [
		{
			name: "Sorting"
		}
	]
});

Hope this helps,
Martin Pavlov
Infragistics, Inc.