How can I display an error message when JSON call fails?

[Eagle_f90]

I am able to successfully display data in my grid when I don't run into any problems getting the data but now I want to display an error message to the user if I run into any problems getting the data. I found http://paramquery.com/api#option-dataModel-error but am not sure how to combine it with a successful call. Also, my understanding of the 3 parameters in that function are that they will only return the core Error data and not a custom message that I return. I can display the Error status code if I have to but it would be nice to display a more user friendly message if possible. Thank you

Code: [Select]

var dataModel =
            {
                location: "remote",
                dataType: "json",
                method: "POST",
                contentType: "application/json; charset=UTF-8",
                url: '@Url.RouteUrl("GetChangeOrders")',
                getData: function (dataJson)
                {
                    return { data: dataJson };
                }
            };

            var obj =
            {
                collapsible: false,
                colModel: colModel,
                dataModel: dataModel,
                editable: false,
                filterModel: { on: true, mode: "AND", header: true },
                flexHeight: true,
                numberCell: { show: false },
                roundCorners: true,
                scrollModel: [lastColumn = "None"],
                sortDir: ["up"],
                sortIndx: ["ID"],
                sorting: "local",
                stripeRows: true,
                title: "IT Change Orders",
                width: $(window).width() - 10,
                wrap: false
            };

[paramvir]

Displaying a custom error message is simple:

dataModel:{
  error: function( ){
    alert( 'custom message' );
  }
  ,..
}

[Eagle_f90]

But that would do a pop-up error correct? I don't want a popup for an error displayed like the "no rows" message.

[paramvir]

That one is:

Code: [Select]

error: function( ){

var oldMsg = $grid.pqGrid( "option", "strNoRows" );
$grid.pqGrid( "option", "strNoRows", "custom message");
$grid.pqGrid( "refresh" );

//restore the normal message.
$grid.pqGrid( "option", "strNoRows", oldMsg);
},


[Eagle_f90]

Thanks for the help