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Axis in ASP.NET MVC HeatMap control

Heat map consists of two axes namely, X-axis and Y-axis that displays the row headers and column headers to plot the data points respectively. You can define the type, format, and other customizing options for both axes in the heat map.

Types

There are three different axis types available in the heat map, which defines the data type of the axis labels. You can define the axis type by using the valueType property in the heat map.

Category axis

Category axis type is used to represent the string values in axis labels.

razor
category.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts => 
ts.Text("Sales Revenue per Employee (in 1000 US$)").TextStyle(ViewBag.textStyle)).XAxis(xAxis =>
xAxis.Labels(ViewBag.xLabels).ValueType(Syncfusion.EJ2.HeatMap.ValueType.Category)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels).ValueType(Syncfusion.EJ2.HeatMap.ValueType.Category)).DataSource(ViewBag.dataSource).Render()
public ActionResult Category()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         string[] xlabels = new string[12] { "Nancy", "Andrew", "Janet", "Margaret", "Steven", "Michael", "Robert", "Laura", "Anne", "Paul", "Karin", "Mario" };
         ViewBag.xLabels = xlabels;
         string[] yLabels = new string[6] { "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat" };
         ViewBag.yLabels = yLabels;
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     int[,] data = new int[,]
            {
                {73, 39, 26, 39, 94, 0},
                {93, 58, 53, 38, 26, 68},
                {99, 28, 22, 4, 66, 90},
                {14, 26, 97, 69, 69, 3},
                {7, 46, 47, 47, 88, 6},
                {41, 55, 73, 23, 3, 79},
                {56, 69, 21, 86, 3, 33},
                {45, 7, 53, 81, 95, 79},
                {60, 77, 74, 68, 88, 51},
                {25, 25, 10, 12, 78, 14},
                {25, 56, 55, 58, 12, 82},
                {74, 33, 88, 23, 86, 59}
            };
            return data;
 }

Numeric axis

Numeric axis type is used to represent the numeric values in axis labels.

razor
numeric.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts => 
ts.Text("Sales Revenue per Employee (in 1000 US$)")).XAxis(xAxis =>
xAxis.Minimum(1).Maximum(11).ValueType(Syncfusion.EJ2.HeatMap.ValueType.Numeric)).YAxis(yaxis =>
yaxis.Minimum(1).Maximum(5).ValueType(Syncfusion.EJ2.HeatMap.ValueType.Category)).DataSource(ViewBag.dataSource).Render()
public ActionResult Numeric()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     int[,] data = new int[,]
            {
                {73, 39, 26, 39, 94, 0},
                {93, 58, 53, 38, 26, 68},
                {99, 28, 22, 4, 66, 90},
                {14, 26, 97, 69, 69, 3},
                {7, 46, 47, 47, 88, 6},
                {41, 55, 73, 23, 3, 79},
                {56, 69, 21, 86, 3, 33},
                {45, 7, 53, 81, 95, 79},
                {60, 77, 74, 68, 88, 51},
                {25, 25, 10, 12, 78, 14},
                {25, 56, 55, 58, 12, 82},
                {74, 33, 88, 23, 86, 59}
            };
            return data;
 }

Date-time axis

Date-time axis type is used to represent the date-time values in axis labels with a specific format. In date-time axis, you can define the start and end date/time using the minimum and maximum properties.

razor
dateTime.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts =>
ts.Text("Monthly Flight Traffic at JFK Airport").TextStyle(ViewBag.textStyle)).XAxis(xAxis =>
{
    xAxis.ValueType(Syncfusion.EJ2.HeatMap.ValueType.DateTime).Minimum(new System.DateTime(2007, 1, 1))
    .Maximum(new System.DateTime(2017, 1, 1)).IntervalType(Syncfusion.EJ2.HeatMap.IntervalType.Years)
    .LabelFormat("yyyy").LabelRotation(45)
    .LabelIntersectAction(Syncfusion.EJ2.HeatMap.LabelIntersectAction.None);
}).YAxis(yaxis => yaxis.Labels( ViewBag.yLabels)).CellSettings(cs =>
cs.Border(ViewBag.border).ShowLabel(false).Format("{value} flights")).LegendSettings(ls =>
ls.Visible(false)).DataSource(ViewBag.dataSource).Render()
public ActionResult DateTime()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         string[] yLabels = new string[12] { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug",
         "Sep", "Oct", "Nov", "Dec"};
         ViewBag.yLabels = yLabels;
         ViewBag.border = new { width = 0};
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     int[,] data = new int[,]
            {
                {36371, 25675, 28292, 33399, 35980, 38585, 39351, 39964, 36543, 30529, 33298, 36985},
                {34702, 27618, 31063, 34525, 36772, 35410, 38750, 39467, 35390, 34196, 35302, 35703},
                {34522, 31324, 32128, 34231, 36817, 34381, 37180, 38255, 32776, 32645, 31539, 32981},
                {32213, 28755, 29517, 31214, 33747, 33507, 35763, 36837, 32910, 33437, 30659, 31965},
                {31282, 28663, 32952, 33941, 34506, 36875, 38836, 35497, 34285, 34094, 32256, 33699},
                {31714, 29405, 33745, 32838, 33461, 35034, 36122, 37943, 34128, 30624, 32398, 33522},
                {32064, 28387, 33751, 32537, 34034, 35977, 37196, 38301, 33627, 34115, 31072, 33939},
                {32417, 27868, 30807, 33386, 35284, 36126, 39753, 40978, 35777, 35277, 31281, 35411},
                {32494, 29848, 34385, 35804, 37943, 38722, 41315, 41335, 37177, 37443, 32457, 37304},
                {34378, 29576, 30547, 35664, 36622, 38145, 40347, 41868, 38252, 36505, 29576, 36450},
                {35219, 31670, 32589, 34927, 36998, 39825, 41126, 42002, 37021, 36583, 32408, 37108}
            };
            return data;
 }

Inversed axis

Heat map supports inversing the axis origin for both axes, where the axis labels are placed in an inversed manner. You can enable axis inversing by enabling the isInversed property.

razor
inversed.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts =>
ts.Text("Monthly Flight Traffic at JFK Airport").TextStyle(ViewBag.textStyle)).XAxis(xAxis =>
{
    xAxis.ValueType(Syncfusion.EJ2.HeatMap.ValueType.DateTime).Minimum(new System.DateTime(2007, 1, 1))
    .Maximum(new System.DateTime(2017, 1, 1)).IntervalType(Syncfusion.EJ2.HeatMap.IntervalType.Years)
    .LabelFormat("yyyy").LabelRotation(45)
    .LabelIntersectAction(Syncfusion.EJ2.HeatMap.LabelIntersectAction.None).IsInversed(true);
}).YAxis(yaxis => yaxis.Labels( ViewBag.yLabels)).CellSettings(cs =>
cs.Border(ViewBag.border).ShowLabel(false).Format("{value} flights")).LegendSettings(ls =>
ls.Visible(false)).DataSource(ViewBag.dataSource).Render()
public ActionResult Inversed()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         string[] yLabels = new string[12] { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug",
         "Sep", "Oct", "Nov", "Dec"};
         ViewBag.yLabels = yLabels;
         ViewBag.border = new { width = 0};
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     int[,] data = new int[,]
            {
                {36371, 25675, 28292, 33399, 35980, 38585, 39351, 39964, 36543, 30529, 33298, 36985},
                {34702, 27618, 31063, 34525, 36772, 35410, 38750, 39467, 35390, 34196, 35302, 35703},
                {34522, 31324, 32128, 34231, 36817, 34381, 37180, 38255, 32776, 32645, 31539, 32981},
                {32213, 28755, 29517, 31214, 33747, 33507, 35763, 36837, 32910, 33437, 30659, 31965},
                {31282, 28663, 32952, 33941, 34506, 36875, 38836, 35497, 34285, 34094, 32256, 33699},
                {31714, 29405, 33745, 32838, 33461, 35034, 36122, 37943, 34128, 30624, 32398, 33522},
                {32064, 28387, 33751, 32537, 34034, 35977, 37196, 38301, 33627, 34115, 31072, 33939},
                {32417, 27868, 30807, 33386, 35284, 36126, 39753, 40978, 35777, 35277, 31281, 35411},
                {32494, 29848, 34385, 35804, 37943, 38722, 41315, 41335, 37177, 37443, 32457, 37304},
                {34378, 29576, 30547, 35664, 36622, 38145, 40347, 41868, 38252, 36505, 29576, 36450},
                {35219, 31670, 32589, 34927, 36998, 39825, 41126, 42002, 37021, 36583, 32408, 37108}
            };
            return data;
 }

Opposed axis

In heat map, you can place the axis label in an opposite position of its default axis label position by using the opposedPosition property.

razor
opposed.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts =>
ts.Text("Monthly Flight Traffic at JFK Airport").TextStyle(ViewBag.textStyle)).XAxis(xAxis =>
{
    xAxis.ValueType(Syncfusion.EJ2.HeatMap.ValueType.DateTime).Minimum(new System.DateTime(2007, 1, 1))
    .Maximum(new System.DateTime(2017, 1, 1)).IntervalType(Syncfusion.EJ2.HeatMap.IntervalType.Years)
    .LabelFormat("yyyy").LabelRotation(45)
    .LabelIntersectAction(Syncfusion.EJ2.HeatMap.LabelIntersectAction.None).OpposedPosition(true);
}).YAxis(yaxis => yaxis.Labels( ViewBag.yLabels)).CellSettings(cs =>
cs.Border(ViewBag.border).ShowLabel(false).Format("{value} flights")).LegendSettings(ls =>
ls.Visible(false)).DataSource(ViewBag.dataSource).Render()
public ActionResult Opposed()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         string[] yLabels = new string[12] { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug",
         "Sep", "Oct", "Nov", "Dec"};
         ViewBag.yLabels = yLabels;
         ViewBag.border = new { width = 0};
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     int[,] data = new int[,]
            {
                {36371, 25675, 28292, 33399, 35980, 38585, 39351, 39964, 36543, 30529, 33298, 36985},
                {34702, 27618, 31063, 34525, 36772, 35410, 38750, 39467, 35390, 34196, 35302, 35703},
                {34522, 31324, 32128, 34231, 36817, 34381, 37180, 38255, 32776, 32645, 31539, 32981},
                {32213, 28755, 29517, 31214, 33747, 33507, 35763, 36837, 32910, 33437, 30659, 31965},
                {31282, 28663, 32952, 33941, 34506, 36875, 38836, 35497, 34285, 34094, 32256, 33699},
                {31714, 29405, 33745, 32838, 33461, 35034, 36122, 37943, 34128, 30624, 32398, 33522},
                {32064, 28387, 33751, 32537, 34034, 35977, 37196, 38301, 33627, 34115, 31072, 33939},
                {32417, 27868, 30807, 33386, 35284, 36126, 39753, 40978, 35777, 35277, 31281, 35411},
                {32494, 29848, 34385, 35804, 37943, 38722, 41315, 41335, 37177, 37443, 32457, 37304},
                {34378, 29576, 30547, 35664, 36622, 38145, 40347, 41868, 38252, 36505, 29576, 36450},
                {35219, 31670, 32589, 34927, 36998, 39825, 41126, 42002, 37021, 36583, 32408, 37108}
            };
            return data;
 }

Label formatting

Heat map supports formatting the axis labels by using the labelFormat property. Using this property, you can customize the axis label by global string format (‘P’, ‘C’, etc) or customized format like ‘{value}°C’.

razor
label-format.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts =>
ts.Text("Monthly Flight Traffic at JFK Airport").TextStyle(ViewBag.textStyle)).XAxis(xAxis =>
{
    xAxis.ValueType(Syncfusion.EJ2.HeatMap.ValueType.DateTime).Minimum(new System.DateTime(2007, 1, 1)).IntervalType(Syncfusion.EJ2.HeatMap.IntervalType.Years).LabelFormat("yyyy");
}).YAxis(yaxis => yaxis.ValueType(Syncfusion.EJ2.HeatMap.ValueType.Numeric).LabelFormat("${value}")).LegendSettings(ls =>
ls.Visible(false)).DataSource(ViewBag.dataSource).Render()
public ActionResult LabelFormat()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     int[,] data = new int[,]
            {
                {73, 39, 26, 39, 94, 0},
                {93, 58, 53, 38, 26, 68},
                {99, 28, 22, 4, 66, 90},
                {14, 26, 97, 69, 69, 3},
                {7, 46, 47, 47, 88, 6},
                {41, 55, 73, 23, 3, 79},
                {56, 69, 21, 86, 3, 33},
                {45, 7, 53, 81, 95, 79},
                {60, 77, 74, 68, 88, 51},
                {25, 25, 10, 12, 78, 14},
                {25, 56, 55, 58, 12, 82},
                {74, 33, 88, 23, 86, 59}
            };
            return data;
 }

Axis intervals

In heat map, you can define an interval between the axis labels using the interval property. In date-time axis, you can change the interval mode by using the intervalType property. The date-time axis supports the following interval types:

  • Years
  • Months
  • Days
  • Hours
  • Minutes
razor
interval.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts =>
ts.Text("Monthly Flight Traffic at JFK Airport").TextStyle(ViewBag.textStyle)).XAxis(xAxis =>
{
    xAxis.ValueType(Syncfusion.EJ2.HeatMap.ValueType.DateTime).Minimum(new System.DateTime(2007, 1, 1))
    .Maximum(new System.DateTime(2017, 1, 1)).IntervalType(Syncfusion.EJ2.HeatMap.IntervalType.Years)
    .LabelFormat("yyyy").Interval(2);
}).YAxis(yaxis => yaxis.Labels( ViewBag.yLabels)).CellSettings(cs =>
cs.Border(ViewBag.border).ShowLabel(false).Format("{value} flights")).LegendSettings(ls =>
ls.Visible(false)).DataSource(ViewBag.dataSource).Render()
public ActionResult Interval()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         string[] yLabels = new string[12] { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug",
         "Sep", "Oct", "Nov", "Dec"};
         ViewBag.yLabels = yLabels;
         ViewBag.border = new { width = 0};
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     int[,] data = new int[,]
            {
                {36371, 25675, 28292, 33399, 35980, 38585, 39351, 39964, 36543, 30529, 33298, 36985},
                {34702, 27618, 31063, 34525, 36772, 35410, 38750, 39467, 35390, 34196, 35302, 35703},
                {34522, 31324, 32128, 34231, 36817, 34381, 37180, 38255, 32776, 32645, 31539, 32981},
                {32213, 28755, 29517, 31214, 33747, 33507, 35763, 36837, 32910, 33437, 30659, 31965},
                {31282, 28663, 32952, 33941, 34506, 36875, 38836, 35497, 34285, 34094, 32256, 33699},
                {31714, 29405, 33745, 32838, 33461, 35034, 36122, 37943, 34128, 30624, 32398, 33522},
                {32064, 28387, 33751, 32537, 34034, 35977, 37196, 38301, 33627, 34115, 31072, 33939},
                {32417, 27868, 30807, 33386, 35284, 36126, 39753, 40978, 35777, 35277, 31281, 35411},
                {32494, 29848, 34385, 35804, 37943, 38722, 41315, 41335, 37177, 37443, 32457, 37304},
                {34378, 29576, 30547, 35664, 36622, 38145, 40347, 41868, 38252, 36505, 29576, 36450},
                {35219, 31670, 32589, 34927, 36998, 39825, 41126, 42002, 37021, 36583, 32408, 37108}
            };
            return data;
 }

Axis label increment

Axis label increment in the heat map is used to display the axis labels with regular interval values in numeric and date-time axes. The labels will be displayed with tick gaps when you set the label interval. But, to achieve the same behavior without tick gaps, use the label increment. You can set the axis label increment using the increment property and the default value of this property is 1.

razor
increment.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").XAxis(xAxis =>
xAxis.ValueType(Syncfusion.EJ2.HeatMap.ValueType.Numeric).Minimum(0).Increment(2)).YAxis(yaxis =>
yaxis.ValueType(Syncfusion.EJ2.HeatMap.ValueType.Numeric).Minimum(0).Increment(3)).DataSource(ViewBag.dataSource).Render()
public ActionResult Increment()
{
    ViewBag.dataSource = GetDataSource();
    return View();
}

 private int[,] GetDataSource()
 {
     int[,] data = new int[,]
            {
                {73, 39, 26, 39, 94, 0},
                {93, 58, 53, 38, 26, 68},
                {99, 28, 22, 4, 66, 90},
                {14, 26, 97, 69, 69, 3},
                {7, 46, 47, 47, 88, 6},
                {41, 55, 73, 23, 3, 79},
                {56, 69, 21, 86, 3, 33},
                {45, 7, 53, 81, 95, 79},
                {60, 77, 74, 68, 88, 51},
                {25, 25, 10, 12, 78, 14},
                {25, 56, 55, 58, 12, 82},
                {74, 33, 88, 23, 86, 59}
            };
            return data;
 }

Limiting labels in date-time axis

You can display the axis labels at specific time intervals along with the date-time axis using the showLabelOn property. This property supports the following types:

  • None: Displays the axis labels based on the intervalType and interval property of the axis. This type is default value of the showLabelOn property.
  • Years: Displays the axis labels on every year between given date-time range.
  • Months: Displays the axis labels on every month between given date-time range.
  • Days: Displays the axis labels on every day between given date-time range.
  • Minutes: Displays the axis labels on every minute between given date-time range.
razor
show-label.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts => ts.Text("Summary of merge requests in GitLab").TextStyle(ViewBag.textStyle)).XAxis(
xAxis =>
{
    xAxis.Minimum(new System.DateTime(2017, 6, 23)).Maximum(new System.DateTime(2018, 6, 30)).IntervalType(Syncfusion.EJ2.HeatMap.IntervalType.Days).ValueType(Syncfusion.EJ2.HeatMap.ValueType.DateTime).
    ShowLabelOn(Syncfusion.EJ2.HeatMap.LabelType.Months).
    LabelFormat("MMM").OpposedPosition(true).Increment(7);
}).YAxis(yaxis =>
{
    yaxis.Labels(ViewBag.yLabels).IsInversed(true);
}).LegendSettings(ls => ls.Position(Syncfusion.EJ2.HeatMap.LegendPosition.Bottom).Width("20%").ShowLabel(true).
Alignment(Syncfusion.EJ2.HeatMap.Alignment.Near).LabelDisplayType(Syncfusion.EJ2.HeatMap.LabelDisplayType.None).
EnableSmartLegend(true)).PaletteSettings(ps => ps.Palette(palette =>
{
    palette.Value(0).Color("rgb(238,238,238)").Label("no contributions").Add();
    palette.Value(1).Color("rgb(172, 213, 242)").Label("1-15 contributions").Add();
    palette.Value(16).Color("rgb(127, 168, 201)").Label("16-31 contributions").Add();
    palette.Value(32).Color("rgb(82, 123, 160)").Label("31-49 contributions").Add();
    palette.Value(50).Color("rgb(37, 78, 119)").Label("50+ contributions").Add();
}).Type(Syncfusion.EJ2.HeatMap.PaletteType.Fixed).EmptyPointColor("white")).Height("300px").CellSettings(cs =>
cs.Border(ViewBag.border).ShowLabel(false)).TooltipRender("tooltipRender").DataSource(ViewBag.dataSource).Render()

<script>
    var tooltipRender = function (args) {
        var intl = new ej.base.Internationalization();
        var format = intl.getDateFormat({ format: 'EEE MMM dd, yyyy' });
        var newDate = args.xValue;
        var date = new Date(newDate.getTime());
        var axisLabel = args.heatmap.axisCollections[1].axisLabels;
        var index = axisLabel.indexOf(args.yLabel);
        (date).setDate((date).getDate() + index);
        var value = format(date);
        args.content = [(args.value === 0 ? 'No' : args.value) + ' ' + 'contributions' + '<br>' + value];
    };
</script>
public ActionResult ShowLabel()
{
    ViewBag.textStyle = new
    {
        size = "15px",
        fontWeight = "500",
        fontStyle = "Normal",
        fontFamily = "Segoe UI"
    };
    string[] yLabels = new string[7] { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
    ViewBag.yLabels = yLabels;
    ViewBag.border = new { color = "white" };
    ViewBag.dataSource = GetDataSource();
    return View();
}

 private int[,] GetDataSource()
 {
     int?[,] dataSource = new int?[,]
            {
                { null, null, null, null, 16, 48, 0 },
                {0, 15, 0, 24, 0, 39, 0},
                { 0, 18, 37, 0, 0, 50, 0},
                { 0, 10, 0, 0, 44, 5, 0},
                { 0, 36, 0, 45, 20, 18, 0},
                { 0, 28, 1, 42, 0, 10, 0},
                { 0, 16, 32, 0, 1, 25, 0},
                { 0, 31, 2, 9, 24, 0, 0},
                { 0, 8, 47, 0, 0, 35, 0},
                { 0, 31, 0, 0, 0, 40, 0},
                { 0, 8, 0, 27, 0, 35, 0},
                {0, 12, 9, 45, 0, 8, 0},
                {0, 0, 13, 0, 22, 10, 0},
                {0, 16, 32, 0, 1, 25, 0},
                {0, 31, 2, 9, 24, 0, 0},
                {0, 8, 47, 27, 0, 35, 0},
                {0, 28, 14, 10, 0, 0, 0},
                {0, 36, 0, 45, 20, 18, 0},
                {0, 28, 1, 42, 0, 10, 0},
                {0, 31, 0, 24, 0, 40, 0},
                {0, 8, 47, 27, 0, 35, 0},
                {0, 36, 0, 45, 20, 18, 0},
                {0, 28, 1, 42, 0, 10, 0},
                {0, 31, 0, 24, 0, 40, 0},
                {0, 16, 32, 0, 1, 25, 0},
                {0, 31, 2, 9, 24, 0, 0},
                {0, 8, 47, 27, 0, 35, 0},
                {0, 10, 0, 36, 23, 19, 0},
                {0, 18, 37, 23, 0, 50, 0},
                {0, 28, 14, 10, 0, 0, 0},
                {0, 18, 37, 23, 0, 50, 0},
                {0, 18, 37, 23, 0, 50, 0},
                {0, 28, 14, 10, 0, 0, 0},
                {0, 31, 2, 9, 24, 0, 0},
                {0, 8, 47, 27, 0, 35, 0},
                {0, 10, 2, 0, 44, 5, 0},
                {0, 36, 0, 45, 20, 18, 0},
                {0, 28, 1, 42, 0, 10, 0},
                {0, 31, 0, 24, 0, 40, 1},
                {0, 16, 32, 0, 1, 25, 0},
                {0, 31, 2, 9, 24, 0, 0},
                {0, 8, 47, 27, 0, 35, 0},
                {0, 10, 2, 0, 44, 5, 0},
                {0, 12, 9, 45, 0, 8, 0},
                {0, 0, 13, 35, 22, 10, 0},
                {0, 28, 14, 10, 0, 0, 0},
                {0, 36, 0, 45, 20, 18, 2},
                {0, 28, 1, 42, 0, 10, 0},
                {0, 31, 0, 24, 0, 40, 1},
                {0, 8, 47, 27, 0, 35, 0},
                {0, 10, 2, 0, 44, 5, 0},
                {0, 31, 2, 9, 24, 0, 1},
                {0, 8, 47, 27, 0, 35, 40},
                {0, 10, 2, 0, 44, 5, null},
            };
            return data;
 }

Multi Level Labels

You can add many levels of labels using the multiLevelLabels property. This property can be configured using the following properties:

  • Categories
  • Overflow
  • Alignment
  • Text style
  • Border

Categories

Using this property, you can configure the start, end, text, maximumTextWidth of the multilevel labels.

razor
multi-level-category.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts => ts.Text("Product wise Monthly sales revenue for a e-commerce website").
TextStyle(ViewBag.textStyle)).XAxis(
xAxis => xAxis.Labels(ViewBag.xLabels)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).PaletteSettings(ps => ps.Palette(palette =>
{
    palette.Color("#F0ADCE").Add();
    palette.Color("#19307B").Add();
})).DataSource(ViewBag.dataSource).LegendSettings(ls => ls.Visible(false)).Load("load").Render()

<script>
    var load = function (args) {
        args.heatmap.xAxis.multiLevelLabels = ([
            {
                categories: [
                    { start: 0, end: 2, text: 'Electronics', },
                    { start: 3, end: 4, text: 'Beauty and personal care', },
                    { start: 5, end: 7, text: 'Fashion', },
                    { start: 8, end: 10, text: 'Household', },
                ]
            },
        ]);
        args.heatmap.yAxis.multiLevelLabels = ([
            {
                categories: [
                    { start: 0, end: 2, text: 'Q1' },
                    { start: 3, end: 5, text: 'Q2' },
                    { start: 6, end: 8, text: 'Q3' },
                    { start: 9, end: 11, text: 'Q4' }
                ]
            },
        ]);
    };
</script>
public ActionResult MultiLevelLabel()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     Double[,] dataSource = new Double[,]
            {
                {52, 65, 67, 45, 37, 52,32, 76, 60, 64, 82, 91 },
                {68, 52, 63, 51, 30, 51, 51, 81, 70, 60, 88, 80 },
                {60, 50, 42, 53, 66, 70, 41, 69, 76, 74, 86, 97},
                {66, 64, 46, 40, 47, 41, 45, 76, 83, 69, 92, 84},
                {65, 42, 58, 32, 36, 44, 49, 79, 83, 69, 83, 93},
                {54, 46, 61, 46, 40, 39, 41, 69, 61, 84, 84, 87},
                {48, 46, 61, 47, 49, 41, 41, 67, 78, 83, 98, 87},
                {69, 52, 41, 44, 41, 52, 46, 71, 63, 84, 83, 91},
                {50, 59, 44, 43, 27, 42, 26, 64, 76, 65, 81, 86},
                {47, 49, 66, 53, 50, 34, 31, 79, 78, 79, 89, 95},
                {61, 40, 62, 26, 34, 54, 56, 74, 83, 78, 95, 98}
            };
            return dataSource;
 }

Overflow

Using this property, you can trim and wrap the multilevel labels.

Note: This support works in x-axis only.

razor
multi-level-overflow.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts => ts.Text("Product wise Monthly sales revenue for a e-commerce website").
TextStyle(ViewBag.textStyle)).XAxis(
xAxis => xAxis.Labels(ViewBag.xLabels)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).PaletteSettings(ps => ps.Palette(palette =>
{
    palette.Color("#F0ADCE").Add();
    palette.Color("#19307B").Add();
})).DataSource(ViewBag.dataSource).LegendSettings(ls => ls.Visible(false)).Load("load").Render()

<script>
    var load = function (args) {
        args.heatmap.xAxis.multiLevelLabels = ([
            {
                overflow:'Trim',
                categories: [
                    { start: 0, end: 2, text: 'Electronics', },
                    { start: 3, end: 4, text: 'Beauty and personal care', },
                    { start: 5, end: 7, text: 'Fashion', },
                    { start: 8, end: 10, text: 'Household', },
                ]
            },
        ]);
        args.heatmap.yAxis.multiLevelLabels = ([
            {
                categories: [
                    { start: 0, end: 2, text: 'Q1' },
                    { start: 3, end: 5, text: 'Q2' },
                    { start: 6, end: 8, text: 'Q3' },
                    { start: 9, end: 11, text: 'Q4' }
                ]
            },
        ]);
    };
</script>
public ActionResult MultiLevelLabel()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     Double[,] dataSource = new Double[,]
            {
                {52, 65, 67, 45, 37, 52,32, 76, 60, 64, 82, 91 },
                {68, 52, 63, 51, 30, 51, 51, 81, 70, 60, 88, 80 },
                {60, 50, 42, 53, 66, 70, 41, 69, 76, 74, 86, 97},
                {66, 64, 46, 40, 47, 41, 45, 76, 83, 69, 92, 84},
                {65, 42, 58, 32, 36, 44, 49, 79, 83, 69, 83, 93},
                {54, 46, 61, 46, 40, 39, 41, 69, 61, 84, 84, 87},
                {48, 46, 61, 47, 49, 41, 41, 67, 78, 83, 98, 87},
                {69, 52, 41, 44, 41, 52, 46, 71, 63, 84, 83, 91},
                {50, 59, 44, 43, 27, 42, 26, 64, 76, 65, 81, 86},
                {47, 49, 66, 53, 50, 34, 31, 79, 78, 79, 89, 95},
                {61, 40, 62, 26, 34, 54, 56, 74, 83, 78, 95, 98}
            };
            return dataSource;
 }

Alignment

This property provides an option to position the multilevel labels at far, center, and near.

razor
multi-level-alignment.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts => ts.Text("Product wise Monthly sales revenue for a e-commerce website").
TextStyle(ViewBag.textStyle)).XAxis(
xAxis => xAxis.Labels(ViewBag.xLabels)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).PaletteSettings(ps => ps.Palette(palette =>
{
    palette.Color("#F0ADCE").Add();
    palette.Color("#19307B").Add();
})).DataSource(ViewBag.dataSource).LegendSettings(ls => ls.Visible(false)).Load("load").Render()

<script>
    var load = function (args) {
        args.heatmap.xAxis.multiLevelLabels = ([
            {
                alignment: 'Near',
                categories: [
                    { start: 0, end: 2, text: 'Electronics', },
                    { start: 3, end: 4, text: 'Beauty and personal care', },
                    { start: 5, end: 7, text: 'Fashion', },
                    { start: 8, end: 10, text: 'Household', },
                ]
            },
        ]);
        args.heatmap.yAxis.multiLevelLabels = ([
            {
                categories: [
                    { start: 0, end: 2, text: 'Q1' },
                    { start: 3, end: 5, text: 'Q2' },
                    { start: 6, end: 8, text: 'Q3' },
                    { start: 9, end: 11, text: 'Q4' }
                ]
            },
        ]);
    };
</script>
public ActionResult MultiLevelLabel()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
     Double[,] dataSource = new Double[,]
            {
                {52, 65, 67, 45, 37, 52,32, 76, 60, 64, 82, 91 },
                {68, 52, 63, 51, 30, 51, 51, 81, 70, 60, 88, 80 },
                {60, 50, 42, 53, 66, 70, 41, 69, 76, 74, 86, 97},
                {66, 64, 46, 40, 47, 41, 45, 76, 83, 69, 92, 84},
                {65, 42, 58, 32, 36, 44, 49, 79, 83, 69, 83, 93},
                {54, 46, 61, 46, 40, 39, 41, 69, 61, 84, 84, 87},
                {48, 46, 61, 47, 49, 41, 41, 67, 78, 83, 98, 87},
                {69, 52, 41, 44, 41, 52, 46, 71, 63, 84, 83, 91},
                {50, 59, 44, 43, 27, 42, 26, 64, 76, 65, 81, 86},
                {47, 49, 66, 53, 50, 34, 31, 79, 78, 79, 89, 95},
                {61, 40, 62, 26, 34, 54, 56, 74, 83, 78, 95, 98}
            };
            return dataSource;
 }

Text Customization

The textStyle property of multilevel labels provides options to customize the size, color, fontFamily, fontWeight, fontStyle, opacity, textAlignment and textOverflow.

razor
multi-level-textstyle.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts => ts.Text("Product wise Monthly sales revenue for a e-commerce website").
TextStyle(ViewBag.textStyle)).XAxis(
xAxis => xAxis.Labels(ViewBag.xLabels)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).PaletteSettings(ps => ps.Palette(palette =>
{
    palette.Color("#F0ADCE").Add();
    palette.Color("#19307B").Add();
})).DataSource(ViewBag.dataSource).LegendSettings(ls => ls.Visible(false)).Load("load").Render()

<script>
    var load = function (args) {
        args.heatmap.xAxis.multiLevelLabels = ([
            {
                textStyle: {
                    color: 'black',
                    fontWeight: 'Bold'
                },
                categories: [
                    { start: 0, end: 2, text: 'Electronics', },
                    { start: 3, end: 4, text: 'Beauty and personal care', },
                    { start: 5, end: 7, text: 'Fashion', },
                    { start: 8, end: 10, text: 'Household', },
                ]
            },
        ]);
        args.heatmap.yAxis.multiLevelLabels = ([
            {
                categories: [
                    { start: 0, end: 2, text: 'Q1' },
                    { start: 3, end: 5, text: 'Q2' },
                    { start: 6, end: 8, text: 'Q3' },
                    { start: 9, end: 11, text: 'Q4' }
                ]
            },
        ]);
    };
</script>
public ActionResult MultiLevelLabel()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
    Double[,] dataSource = new Double[,]
            {
                {52, 65, 67, 45, 37, 52,32, 76, 60, 64, 82, 91 },
                {68, 52, 63, 51, 30, 51, 51, 81, 70, 60, 88, 80 },
                {60, 50, 42, 53, 66, 70, 41, 69, 76, 74, 86, 97},
                {66, 64, 46, 40, 47, 41, 45, 76, 83, 69, 92, 84},
                {65, 42, 58, 32, 36, 44, 49, 79, 83, 69, 83, 93},
                {54, 46, 61, 46, 40, 39, 41, 69, 61, 84, 84, 87},
                {48, 46, 61, 47, 49, 41, 41, 67, 78, 83, 98, 87},
                {69, 52, 41, 44, 41, 52, 46, 71, 63, 84, 83, 91},
                {50, 59, 44, 43, 27, 42, 26, 64, 76, 65, 81, 86},
                {47, 49, 66, 53, 50, 34, 31, 79, 78, 79, 89, 95},
                {61, 40, 62, 26, 34, 54, 56, 74, 83, 78, 95, 98}
            };
            return dataSource;
 }

Border Customization

Using the border property, you can customize the width, color, and type. The types of border are Rectangle, WithoutTopBorder, WithoutBottomBorder, WithoutTopAndBottomBorder, Brace, WithoutBorder.

razor
multi-level-border.cs
@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").TitleSettings(ts => ts.Text("Product wise Monthly sales revenue for a e-commerce website").
TextStyle(ViewBag.textStyle)).XAxis(
xAxis => xAxis.Border(br=>br.Width(1).Type(Syncfusion.EJ2.HeatMap.BorderType.Rectangle).
Color("#a19d9d")).Labels(ViewBag.xLabels)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).PaletteSettings(ps => ps.Palette(palette =>
{
    palette.Color("#F0ADCE").Add();
    palette.Color("#19307B").Add();
})).DataSource(ViewBag.dataSource).LegendSettings(ls => ls.Visible(false)).Load("load").Render()

<script>
    var load = function (args) {
        args.heatmap.xAxis.multiLevelLabels = ([
            {
                border: { type: 'Brace', color: '#a19d9d' },
                categories: [
                    { start: 0, end: 2, text: 'Electronics', },
                    { start: 3, end: 4, text: 'Beauty and personal care', },
                    { start: 5, end: 7, text: 'Fashion', },
                    { start: 8, end: 10, text: 'Household', },
                ]
            },
        ]);
        args.heatmap.yAxis.multiLevelLabels = ([
            {
                border: { type: 'Brace', color: '#a19d9d' },
                categories: [
                    { start: 0, end: 2, text: 'Q1' },
                    { start: 3, end: 5, text: 'Q2' },
                    { start: 6, end: 8, text: 'Q3' },
                    { start: 9, end: 11, text: 'Q4' }
                ]
            },
        ]);
    };
</script>
public ActionResult MultiLevelLabel()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Normal",
         fontFamily= "Segoe UI"
         };
         ViewBag.dataSource = GetDataSource();
         return View();
}

 private int[,] GetDataSource()
 {
    Double[,] dataSource = new Double[,]
            {
                {52, 65, 67, 45, 37, 52,32, 76, 60, 64, 82, 91 },
                {68, 52, 63, 51, 30, 51, 51, 81, 70, 60, 88, 80 },
                {60, 50, 42, 53, 66, 70, 41, 69, 76, 74, 86, 97},
                {66, 64, 46, 40, 47, 41, 45, 76, 83, 69, 92, 84},
                {65, 42, 58, 32, 36, 44, 49, 79, 83, 69, 83, 93},
                {54, 46, 61, 46, 40, 39, 41, 69, 61, 84, 84, 87},
                {48, 46, 61, 47, 49, 41, 41, 67, 78, 83, 98, 87},
                {69, 52, 41, 44, 41, 52, 46, 71, 63, 84, 83, 91},
                {50, 59, 44, 43, 27, 42, 26, 64, 76, 65, 81, 86},
                {47, 49, 66, 53, 50, 34, 31, 79, 78, 79, 89, 95},
                {61, 40, 62, 26, 34, 54, 56, 74, 83, 78, 95, 98}
            };
            return dataSource;
 }