Refresh a single Kendo grid row

Question

Is there a way to refresh a single Kendo grid row without refreshing the whole datasource or using jQuery to set the value for each cell?

Answer 1

data.set will actually refresh the entire grid and send a databound event in some cases. This is very slow and unnecessary. It will also collapse any expanded detail templates which is not ideal.

I would recommend you to use this function that I wrote to update a single row in a kendo grid.

// Updates a single row in a kendo grid without firing a databound event.
// This is needed since otherwise the entire grid will be redrawn.
function kendoFastRedrawRow(grid, row) {
    var dataItem = grid.dataItem(row);

    var rowChildren = $(row).children('td[role="gridcell"]');

    for (var i = 0; i < grid.columns.length; i++) {

        var column = grid.columns[i];
        var template = column.template;
        var cell = rowChildren.eq(i);

        if (template !== undefined) {
            var kendoTemplate = kendo.template(template);

            // Render using template
            cell.html(kendoTemplate(dataItem));
        } else {
            var fieldValue = dataItem[column.field];

            var format = column.format;
            var values = column.values;

            if (values !== undefined && values != null) {
                // use the text value mappings (for enums)
                for (var j = 0; j < values.length; j++) {
                    var value = values[j];
                    if (value.value == fieldValue) {
                        cell.html(value.text);
                        break;
                    }
                }
            } else if (format !== undefined) {
                // use the format
                cell.html(kendo.format(format, fieldValue));
            } else {
                // Just dump the plain old value
                cell.html(fieldValue);
            }
        }
    }
}

Example:

// Get a reference to the grid
var grid = $("#my_grid").data("kendoGrid");

// Access the row that is selected
var select = grid.select();
// and now the data
var data = grid.dataItem(select);

// Update any values that you want to
data.symbol = newValue;
data.symbol2 = newValue2;
...

// Redraw only the single row in question which needs updating
kendoFastRedrawRow(grid, select);

// Then if you want to call your own databound event to do any funky post processing:
myDataBoundEvent.apply(grid);