ASP.NET MVC HeatMap Overview
The Telerik UI HeatMap HtmlHelper for ASP.NET MVC is a server-side wrapper for the Kendo UI HeatMap widget.
The HeatMap uses colors to indicate the relative value of data points in two dimensions. HeatMap charts are suitable for visualizing the magnitude of a value over two dimensions.
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To see the component in action, check the examples:
Basic configuration
The following example demonstrates how to define a HeatMap.
@(Html.Kendo().Chart()
.Name("heatmap")
.Title("Source control contributions for the last 12 weeks")
.Series(series =>
{
series.HeatMap(new object[] {
new {Week = 1, Day = "Mon", Value = 8}, new {Week = 1, Day = "Tue", Value = 4}, new {Week = 1, Day = "Wed", Value = 7}, new {Week = 1, Day = "Thu", Value = 14}, new {Week = 1, Day = "Fri", Value = 10}, new {Week = 1, Day = "Sat", Value = 0}, new {Week = 1, Day = "Sun", Value = 0},
new {Week = 2, Day = "Mon", Value = 6}, new {Week = 2, Day = "Tue", Value = 6}, new {Week = 2, Day = "Wed", Value = 9}, new {Week = 2, Day = "Thu", Value = 12}, new {Week = 2, Day = "Fri", Value = 12}, new {Week = 2, Day = "Sat", Value = 3}, new {Week = 2, Day = "Sun", Value = 0},
new {Week = 3, Day = "Mon", Value = 5}, new {Week = 3, Day = "Tue", Value = 5}, new {Week = 3, Day = "Wed", Value = 8}, new {Week = 3, Day = "Thu", Value = 11}, new {Week = 3, Day = "Fri", Value = 0}, new {Week = 3, Day = "Sat", Value = 1}, new {Week = 3, Day = "Sun", Value = 0},
new {Week = 4, Day = "Mon", Value = 0}, new {Week = 4, Day = "Tue", Value = 0}, new {Week = 4, Day = "Wed", Value = 0}, new {Week = 4, Day = "Thu", Value = 0}, new {Week = 4, Day = "Fri", Value = 0}, new {Week = 4, Day = "Sat", Value = 0}, new {Week = 4, Day = "Sun", Value = 0},
new {Week = 5, Day = "Mon", Value = 9}, new {Week = 5, Day = "Tue", Value = 0}, new {Week = 5, Day = "Wed", Value = 0}, new {Week = 5, Day = "Thu", Value = 0}, new {Week = 5, Day = "Fri", Value = 0}, new {Week = 5, Day = "Sat", Value = 0}, new {Week = 5, Day = "Sun", Value = 0},
new {Week = 6, Day = "Mon", Value = 6}, new {Week = 6, Day = "Tue", Value = 4}, new {Week = 6, Day = "Wed", Value = 7}, new {Week = 6, Day = "Thu", Value = 14}, new {Week = 6, Day = "Fri", Value = 10}, new {Week = 6, Day = "Sat", Value = 2}, new {Week = 6, Day = "Sun", Value = 0},
new {Week = 7, Day = "Mon", Value = 4}, new {Week = 7, Day = "Tue", Value = 6}, new {Week = 7, Day = "Wed", Value = 9}, new {Week = 7, Day = "Thu", Value = 2}, new {Week = 7, Day = "Fri", Value = 4}, new {Week = 7, Day = "Sat", Value = 0}, new {Week = 7, Day = "Sun", Value = 0},
new {Week = 8, Day = "Mon", Value = 11}, new {Week = 8, Day = "Tue", Value = 4}, new {Week = 8, Day = "Wed", Value = 7}, new {Week = 8, Day = "Thu", Value = 14}, new {Week = 8, Day = "Fri", Value = 10}, new {Week = 8, Day = "Sat", Value = 0}, new {Week = 8, Day = "Sun", Value = 0},
new {Week = 9, Day = "Mon", Value = 5}, new {Week = 9, Day = "Tue", Value = 4}, new {Week = 9, Day = "Wed", Value = 7}, new {Week = 9, Day = "Thu", Value = 4}, new {Week = 9, Day = "Fri", Value = 1}, new {Week = 9, Day = "Sat", Value = 0}, new {Week = 9, Day = "Sun", Value = 0},
new {Week = 10, Day = "Mon", Value = 3}, new {Week = 10, Day = "Tue", Value = 6}, new {Week = 10, Day = "Wed", Value = 9}, new {Week = 10, Day = "Thu", Value = 12}, new {Week = 10, Day = "Fri", Value = 12}, new {Week = 10, Day = "Sat", Value = 4}, new {Week = 10, Day = "Sun", Value = 0},
new {Week = 11, Day = "Mon", Value = 1}, new {Week = 11, Day = "Tue", Value = 4}, new {Week = 11, Day = "Wed", Value = 7}, new {Week = 11, Day = "Thu", Value = 10}, new {Week = 11, Day = "Fri", Value = 10}, new {Week = 11, Day = "Sat", Value = 0}, new {Week = 11, Day = "Sun", Value = 0},
new {Week = 12, Day = "Mon", Value = 0}, new {Week = 12, Day = "Tue", Value = 4}, new {Week = 12, Day = "Wed", Value = 7}, new {Week = 12, Day = "Thu", Value = 8}, new {Week = 12, Day = "Fri", Value = 10}, new {Week = 12, Day = "Sat", Value = 0}, new {Week = 12, Day = "Sun", Value = 0}
}).xField("Week").yField("Day").Field("Value");
})
.Tooltip(t => t.Visible(true).Template("#:value.value# contributions on #:value.y#, week #:value.x#"))
.XAxis(x=>x
.Numeric()
.Labels(l=>l.Template("Week #:value#").Rotation(45))
)
.YAxis(y=>y
.Categories(new[] { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"})
)
)
Events
You can subscribe to all HeatMap events.
Handling Events by Handler Name
The following example demonstrates how to subscribe to events by a handler name.
@(Html.Kendo().Chart()
.Name("heatmap")
// other configuration
.Events(events => events
.DataBound("onDataBound")
)
)
<script>
function onDataBound(e) {
// Handle the dataBound event.
}
</script>
Referencing Existing Instances
To reference an existing Kendo UI HeatMap instance, use the jQuery.data() configuration option. Once a reference is established, use the Client-side API to control its behavior.
// Place the following after the declaration of the TreeMap for ASP.NET MVC.
<script>
$(function() {
// The Name() of the TreeMap is used to get its client-side instance.
var heatMap = $("#heatmap").data("kendoChart");
});
</script>