Style Grid Table Rows and Cells Based on Values
Environment
| Product | Progress® Telerik® UI Grid for UI for ASP.NET Core |
| Progress Telerik UI version | 2021.3.1207 |
Description
How can I customize the cells and rows of the Telerik UI for ASP.NET Core Grid on data items values?
Solution
Grid templates enable you to customize and style the content inside the table cells. However, your project might require the customization of the tables cells or rows of the Grid. Naturally, the custom styling is likely based on the values of the data items.
Although the demos apply custom CSS classes, you can still use the demonstrated approaches even if you apply inline styles or other HTML attributes.
To customize the rows and cells based on the values of the data items, utilize any of the following approaches:
Iterate the Table Rows
The usage of the dataBound handler and the iteration of the table rows is suitable only if you intend to customize all Grid rows. The approach loops through all Grid rows and, based on the values they contain, determines which custom-class names will be applied to them.
Refer to the following REPL for a live demo of the approach.
//Grid definition also available in the *Custom data source Demo*
@model IEnumerable<Kendo.Mvc.Examples.Models.ProductViewModel>
@using Kendo.Mvc.UI
@(Html.Kendo().Grid(Model)
.Name("Grid")
.Columns(columns =>
{
columns.Bound(p => p.ProductName).Title("Product Name");
columns.Bound(p => p.UnitPrice).Title("Unit Price").Width(130);
columns.Bound(p => p.UnitsInStock).Title("Units In Stock").Width(130);
columns.Bound(p => p.Discontinued).Width(130);
})
.Pageable()
.Sortable()
.Scrollable(scr=>scr.Height(430))
.Filterable()
.Events(e=>e.Databound("databound"))
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(20)
.ServerOperation(false)
)
)
<style>
.k-grid {
width: 500px;
}
.discontinued {
font-weight: bold;
color: #f00;
}
.critical {
background-color: #fdd;
}
.warning {
background-color: #fda;
}
.ok {
background-color: #ced;
}
</style>
<script>
function getUnitsInStockClass(units) {
if (units < 5) {
return "critical";
} else if (units < 10) {
return "warning";
} else {
return "ok";
}
}
function dataBound(e) {
// get the index of the UnitsInStock cell
var columns = e.sender.columns;
var columnIndex = this.wrapper.find(".k-grid-header [data-field=" + "UnitsInStock" + "]").index();
// iterate the table rows and apply custom row and cell styling
var rows = e.sender.tbody.children();
for (var j = 0; j < rows.length; j++) {
var row = $(rows[j]);
var dataItem = e.sender.dataItem(row);
var units = dataItem.get("UnitsInStock");
var discontinued = dataItem.get("Discontinued");
if (discontinued) {
row.addClass("discontinued");
}
var cell = row.children().eq(columnIndex);
cell.addClass(getUnitsInStockClass(units));
}
}
</script>
Iterate the Data Items
The usage of the dataBound handler and the iteration of the data items is suitable only if you intend to customize part of the Grid rows. The approach loops through all data items of the Grid and accesses just the rows which match certain conditions.
Refer to the following REPL for a live demo of the approach.
//Grid definition also available in the *Custom data source Demo*
@model IEnumerable<Kendo.Mvc.Examples.Models.ProductViewModel>
@using Kendo.Mvc.UI
@(Html.Kendo().Grid(Model)
.Name("Grid")
.Columns(columns =>
{
columns.Bound(p => p.ProductName).Title("Product Name");
columns.Bound(p => p.UnitPrice).Title("Unit Price").Width(130);
columns.Bound(p => p.UnitsInStock).Title("Units In Stock").Width(130);
columns.Bound(p => p.Discontinued).Width(130);
})
.Pageable()
.Sortable()
.Scrollable(scr=>scr.Height(430))
.Filterable()
.Events(e=>e.Databound("databound"))
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(20)
.ServerOperation(false)
)
)
<style>
.k-grid {
width: 500px;
}
.discontinued {
font-weight: bold;
color: #f00;
}
</style>
<script>
function(e) dataBound{
// get the index of the UnitsInStock cell
var columns = e.sender.columns;
var columnIndex = this.wrapper.find(".k-grid-header [data-field=" + "UnitsInStock" + "]").index();
// iterate the data items and apply row styles where necessary
var dataItems = e.sender.dataSource.view();
for (var j = 0; j < dataItems.length; j++) {
var discontinued = dataItems[j].get("Discontinued");
var row = e.sender.tbody.find("[data-uid='" + dataItems[j].uid + "']");
if (discontinued) {
row.addClass("discontinued");
}
}
}
</script>
Use a Row Template
The usage of a row template is suitable only if you do not intend to use hierarchy, grouping, editing, and frozen columns—the Grid does not support the simultaneous application of these features and row templates. The approach directly adds template expressions to the rowTemplate and altRowTemplate definitions and determines which custom CSS classes will be applied to a given row or cell.
Refer to the following REPL for a live demo of the approach.
//Grid definition also available in the *Custom data source Demo*
@model IEnumerable<Kendo.Mvc.Examples.Models.ProductViewModel>
@using Kendo.Mvc.UI
@(Html.Kendo().Grid(Model)
.Name("Grid")
.Columns(columns =>
{
columns.Bound(p => p.ProductName).Title("Product Name");
columns.Bound(p => p.UnitPrice).Title("Unit Price").Width(130);
columns.Bound(p => p.UnitsInStock).Title("Units In Stock").Width(130);
columns.Bound(p => p.Discontinued).Width(130);
})
.ClientAltRowTemplate("#=rowTemplateString#")
.ClientRowTemplate("#=altRowTemplateString#")
.Pageable()
.Sortable()
.Scrollable(scr=>scr.Height(430))
.Filterable()
.Events(e=>e.Databound("databound"))
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(20)
.ServerOperation(false)
)
)
<style>
.k-grid {
width: 500px;
}
.discontinued {
font-weight: bold;
color: #f00;
}
.critical {
background-color: #fdd;
}
.warning {
background-color: #fda;
}
.ok {
background-color: #ced;
}
</style>
<script>
var rowTemplateString = '<tr class="#: Discontinued ? "discontinued" : "" #" data-uid="#: uid #">' +
'<td>#: ProductName #</td>' +
'<td class="#: getUnitsInStockClass(UnitsInStock) #">#: UnitsInStock #</td>' +
'<td>#: Discontinued #</td>' +
'</tr>';
var altRowTemplateString = rowTemplateString.replace('tr class="', 'tr class="k-alt ');
function getUnitsInStockClass(units) {
if (units < 5) {
return "critical";
} else if (units < 10) {
return "warning";
} else {
return "ok";
}
}
</script>