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Appearance in ASP.NET MVC HeatMap Chart control

08 Apr 2021 / 2 minutes to read

Cell/customizations

You can customize the cell by using the cellSettings property.

Border

Change the width, color, and radius of the heat map cells by using the border property.

razor
border.cs
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@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)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).CellSettings(cs =>
cs.Border(ViewBag.border)).DataSource(ViewBag.dataSource).Render()
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public ActionResult Border()
{
    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();
         ViewBag.border = new { width = 1,radius = 4, color= "white" };
         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;
 }

Cell highlighting

Enable or disable the cell highlighting while hover over the heat map cells by using the enableCellHighlighting property.

Note: The cell highlighting only works in a SVG rendering mode.

razor
cell-highlight.cs
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@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)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).CellSettings(cs =>
cs.EnableCellHighlighting(true)).DataSource(ViewBag.dataSource).Render()
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public ActionResult CellHighlight()
{
    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;
 }

Color gradient mode

You can set the minimum and maximum value colors based on row and column using the ColorGradientMode property. The types of ColorGradientMode,

  • Table: The minimum and maximum value colors calculated for overall data.
  • Row: The minimum and maximum value colors calculated for each row of data.
  • Column: The minimum and maximum value colors calculated for each column of data.

Note: The default value of ColorGradientMode is Table.

razor
colormode.cs
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@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)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).CellSettings(cs =>
cs.EnableCellHighlighting(true)).PaletteSettings(ps => ps.ColorGradientMode(Syncfusion.EJ2.HeatMap.ColorGradientMode.Column)).DataSource(ViewBag.dataSource).Render()
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public ActionResult CellHighlight()
{
    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;
 }

Margin

Set the margin for the heat map from its container by using the margin property.

razor
margin.cs
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@using Syncfusion.EJ2;
@Html.EJS().HeatMap("container").Margin(margin => margin.Left(15).Right(15).Top(15).Bottom(15)).TitleSettings(ts => 
ts.Text("Sales Revenue per Employee (in 1000 US$)").TextStyle(ViewBag.textStyle)).XAxis(xAxis =>
xAxis.Labels(ViewBag.xLabels)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).DataSource(ViewBag.dataSource).Render()
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public ActionResult Margin()
{
    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;
 }

Title

The title is used to provide a quick information about the data plotted in heat map. The text property is used to set the title for heat map. You can also customize text style of a title by using the textStyle property.

razor
title.cs
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@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)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).DataSource(ViewBag.dataSource).Render()
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public ActionResult Title()
{
    ViewBag.textStyle = new
     {
         size= "15px",
         fontWeight= "500",
         fontStyle= "Italic",
         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;
 }

Data label

You can toggle the visibility of data labels by using the showLabel property. By default, the data label will be visible.

razor
data-label.cs
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@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)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).CellSettings(cs =>
cs.ShowLabel(false)).DataSource(ViewBag.dataSource).Render()
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public ActionResult DataLabel()
{
    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;
 }

Text style

You can customize the font family, font size, and color of the data label by using the textStyle in the cellSettings property.

razor
text-style.cs
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@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)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).CellSettings(cs =>
cs.TextStyle(ViewBag.cellTextStyle)).DataSource(ViewBag.dataSource).Render()
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public ActionResult TextStyle()
{
    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();
         ViewBag.cellTextStyle = new { fontStyle = "Italic",fontFamily = "Segoe UI"};
         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;
 }

Format

You can change the format of the data label, such as currency, decimal, percent etc. by using format property.

razor
format.cs
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@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)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).CellSettings(cs =>
cs.Format("{value} $")).DataSource(ViewBag.dataSource).Render()
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public ActionResult Format()
{
    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;
 }

Customize the cell value

In the HeatMap, you can customize the cell value using the cellRender client-side event.

razor
cellRender.cs
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@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)).YAxis(yaxis =>
yaxis.Labels(ViewBag.yLabels)).CellRender("cellRender").DataSource(ViewBag.dataSource).Render()

<script>
var cellRender = function (args) {
    args.displayText = (args.value) + ';
};
</script>
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public ActionResult CellRender()
{
    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;
 }

See Also