Introduction

In this post, I explain How to create Intensity Chart using MVC4 & Jquery.
We all know, An intensity map of Google Chart which is very useful one, that's highlights regions or countries based on relative values. Here I have explained how to apply Intensity Chart in a table. An intensity Chart that highlights table cells based on relative values.

Steps :

Step - 1: Create New Project.

Go to File > New > Project > Select asp.net MVC4 web application > Entry Application Name > Click OK > Select Internet Application > Select view engine Razor > OK

Step-2: Add a new Controller.

Go to Solution Explorer > Right Click on Controllers folder form Solution Explorer > Add > Controller > Enter Controller name > Select Templete "empty MVC Controller"> Add.

Step-3: Add new action into your controller for Get Method.

Here I have added "Chart" Action into "Home" Controller. Please write this following code

            public ActionResult Chart()
            {
                return View();
            }
        

Step-4: Add view for the Action & design.

Right Click on Action Method (here right click on form action) > Add View... > Enter View Name > Select View Engine (Razor) > Check "Create a strong-typed view" > Select your model class > Add.

Step-5: Add jQuery code for creating the Intensity Chart.

Jquery Code

               <script>
                $(document).ready(function () {
            
                    var Color = '#FF9966';
                    var isReverse = false;
                    SetColor(Color, isReverse);

                    // For Reverse Color Button Click
                    $("#rev").click(function () {
                        isReverse = !isReverse;
                        SetColor(Color, isReverse);
                    });

                });
                function SetColor(Color, isReverse) {
            
                    //Find Max Value
                    var maxValue = 1;
                    $("#data tr").each(function (i, val) {
                        var $tr = this;
                        $("td", $tr).each(function (i, val) {
                            var value = parseInt($(this).text());
                            maxValue = value > maxValue ? value : maxValue;
                        });
                    });

                    // Set Color Here
                    $("#data tr").each(function (i, val) {
                        var $tr = this;
                        $("td", $tr).each(function (i, val) {
                            var value = parseInt($(this).text());
                            value = value == 0 ? 1 : value;
                            var percent = ((1 / maxValue) * value);
                            $(this).css('background-color', GetColor(Color.substr(1), (isReverse ? percent : 1 - percent)));
                        });
                    });
                }

                function GetColor(colorHex, percent) {
            
                    colorHex = String(colorHex).replace(/^0-9a-f/gi, '');
                    if (colorHex.length < 6) {
                        colorHex = colorHex[0] + colorHex[0] + colorHex[1] + colorHex[1] + colorHex[2] + colorHex[2];
                    }
                    percent = percent || 0;
                    var rgb = "#", c, i;
                    for (var i = 0; i < 3; i++) {
                        c = parseInt(colorHex.substr(i * 2, 2), 16);
                        c = Math.round(Math.min(Math.max(0, c + (c * percent)), 255)).toString(16);
                        rgb += ("00" + c).substr(c.length);
                    }
                    return rgb;
                }
            </script>
            

Complete View

            @{
                ViewBag.Title = "Chart";
            }

            <h2> Intensity Chart</h2>

            <div>
                <input type="button" id="rev" value="Reverse Color" />
    
                @* Create a table for hold your data *@
                <table id="data" border="0" cellpadding="0" cellspacing="0">
                    @{
                        Random r = new Random();
                        for (int i = 0; i < 5; i++)
                        {
                            <tr>
                                @for (int j = 0; j < 5; j++)
                       {
                                    <td><span style="display:inline-block;padding:10px;min-width:80px;">@(r.Next(100))</span></td>
                       }
                            </tr>
                        }
                    }
                </table>
            </div>

            @* Here I am going to add some js code for the intensity chart *@

            @section Scripts{
                <script>
                    $(document).ready(function () {
            
                        var Color = '#FF9966';
                        var isReverse = false;
                        SetColor(Color, isReverse);

                        // For Reverse Color Button Click
                        $("#rev").click(function () {
                            isReverse = !isReverse;
                            SetColor(Color, isReverse);
                        });

                    });
                    function SetColor(Color, isReverse) {
            
                        //Find Max Value
                        var maxValue = 1;
                        $("#data tr").each(function (i, val) {
                            var $tr = this;
                            $("td", $tr).each(function (i, val) {
                                var value = parseInt($(this).text());
                                maxValue = value > maxValue ? value : maxValue;
                            });
                        });

                        // Set Color Here
                        $("#data tr").each(function (i, val) {
                            var $tr = this;
                            $("td", $tr).each(function (i, val) {
                                var value = parseInt($(this).text());
                                value = value == 0 ? 1 : value;
                                var percent = ((1 / maxValue) * value);
                                $(this).css('background-color', GetColor(Color.substr(1), (isReverse ? percent : 1 - percent)));
                            });
                        });
                    }

                    function GetColor(colorHex, percent) {
            
                        colorHex = String(colorHex).replace(/^0-9a-f/gi, '');
                        if (colorHex.length < 6) {
                            colorHex = colorHex[0] + colorHex[0] + colorHex[1] + colorHex[1] + colorHex[2] + colorHex[2];
                        }
                        percent = percent || 0;
                        var rgb = "#", c, i;
                        for (var i = 0; i < 3; i++) {
                            c = parseInt(colorHex.substr(i * 2, 2), 16);
                            c = Math.round(Math.min(Math.max(0, c + (c * percent)), 255)).toString(16);
                            rgb += ("00" + c).substr(c.length);
                        }
                        return rgb;
                    }
                </script>
            }
        

Step-8: Run Application.