Data Visualization ▸ Bar Gauge

@model IEnumerable<DevExtreme.MVC.Demos.Models.Color>

@{ var firstColor = Model.First(); }

<div class="long-title"><h3>Colors Representation via Basic Colors</h3></div>
<div id="gauge-demo">
    @(Html.DevExtreme().BarGauge()
        .ID("gauge")
        .StartValue(0)
        .EndValue(255)
        .Palette(new[] { "#ff0000", "#00ff00", "#0000ff" })
        .Label(l => l.Visible(false))
        .Values(new JS(String.Format(@"getBasicColors(""{0}"")", firstColor.Code)))
    )
    <div class="action-container">
        @(Html.DevExtreme().SelectBox()
            .ID("select-color")
            .InputAttr("aria-label", "Color")
            .Width(150)
            .DataSource(Model)
            .DisplayExpr("Name")
            .ValueExpr("Name")
            .Value(firstColor.Name)
            .OnSelectionChanged(@<text>
                function(e) {
                    var gauge = $("#gauge").dxBarGauge("instance");
                    gauge.option("values", getBasicColors(e.selectedItem.Code));
                }
            </text>)
        )
        <div class="color-box"></div>
    </div>
</div>

<script>
    function getBasicColors(value) {
        var code = Number("0x" + value.slice(1));

        $(".color-box").css("background-color", value);
        return [
            (code >> 16) & 0xff,
            (code >> 8) & 0xff,
            code & 0xff
        ];
    }
</script>

using DevExtreme.MVC.Demos.Models.SampleData;
using System.Collections.Generic;
using System.Web.Mvc;

namespace DevExtreme.MVC.Demos.Controllers {
    public class GaugesController : Controller {

        public ActionResult BarGauge() {
            return View(SampleData.Colors);
        }

    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace DevExtreme.MVC.Demos.Models {
    public class Color {
        public string Name { get; set; }
        public string Code { get; set; }
    }
}

using System;
using System.Collections.Generic;

namespace DevExtreme.MVC.Demos.Models.SampleData {
    public partial class SampleData {
        public static readonly IEnumerable<Color> Colors = new[] {
            new Color {
                Name = "Amaranth",
                Code = "#e52b50"
            },
            new Color {
                Name = "Amethyst",
                Code = "#9966cc"
            },
            new Color {
                Name = "Ash grey",
                Code = "#b2beb5"
            },
            new Color {
                Name = "Barn red",
                Code = "#7c0a02"
            },
            new Color {
                Name = "Imperial",
                Code = "#602f6b"
            },
            new Color {
                Name = "Lemon lime",
                Code = "#e3ff00"
            },
            new Color {
                Name = "Mountain Meadow",
                Code = "#30ba8f"
            },
            new Color {
                Name = "Outer Space",
                Code = "#414a4c"
            },
            new Color {
                Name = "Persian plum",
                Code = "#701c1c"
            },
            new Color {
                Name = "Seal brown",
                Code = "#321414"
            },
            new Color {
                Name = "Twilight lavender",
                Code = "#8a496b"
            },
            new Color {
                Name = "Umber",
                Code = "#635147"
            }
        };
    }
}

#gauge-demo {
    height: 440px;
    width: 100%;
}
 
#gauge {
    width: 80%;
    height: 100%;
    margin-top: 20px;
    float: left;
}
 
.action-container {
    width: 20%;
    text-align: left;
    margin-top: 20px;
    float: left;
}
 
.color-box {
    width: 40px;
    height: 40px;
    margin-top: 20px;
}
 
.long-title h3 {
    font-weight: 200;
    font-size: 28px;
    text-align: center;
    margin-bottom: 20px;
}