Autocomplete text from sql database

var tem = new Array();

$(function () {

$("#txtClientName").autocomplete({
source: function (request, response) {

$.ajax({

url: "url",
type: "POST",
dataType: "json",

data: { searchText: request.term, maxResults: 10 },
success: function (data) {

if (data.toString() != "No Record Found") {
var i = 0;

response($.map(data, function (item) {

// $('#txtName').val(item.strUserName);
tem[i] = item.Text;
i++;
return { label: item.Text, id: item.Value }
}))

}
}
})
},
select: function (event, ui) {

//alert(ui.item ? (ui.item.label +"You picked '" + ui.item.label + "' with an ID of " + ui.item.id): "Nothing selected, input was " + this.value);

$('#txtClientName').val(ui.item.label);


}

});

});
on controller:-

public JsonResult getClientName(string searchText)
             {

HomeModel mgrObj = new HomeModel();
SortedList lstObj = new SortedList();

//connect to data base query.and return list
return Json(slst);
}