User Interaction in ASP.NET Core Linear Gauge control

14 Apr 2021 / 2 minutes to read

Linear gauge will display the details about the pointer value through tooltip, when the mouse is moved over the pointer. By default, tooltip will not be visible and you can enable the tooltip by setting enable property to true.

tagHelper

tooltip.cs

@{ 
    var tooltip = new LinearGaugeTooltipSettings
    {
        Enable = true
    };
}
@using Syncfusion.EJ2
<ejs-lineargauge id="linear" load="gaugeLoad" tooltip="tooltip"></ejs-lineargauge>
<script>
    window.gaugeLoad = function (args) {
        var axis = args.gauge.axes[0];
        axis.pointers = [{
            value: 80
        }]
    }
</script>

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2_Core_Application.Models;
using Newtonsoft.Json;
using Syncfusion.EJ2.Charts;
using Syncfusion.EJ2.LinearGauge;


namespace EJ2_Core_Application.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {

            return View();
        }
    }
}

Format the Tooltip

By default, tooltip will show the pointer value only. In addition to that, you can show more information in tooltip. For example, the format ${value} shows pointer value with currency symbol.

tagHelper

tooltip-format.cs

@{ 
    var tooltip = new LinearGaugeTooltipSettings
    {
        Enable = true,
        Format= "${value}"
    };
}
@using Syncfusion.EJ2
<ejs-lineargauge id="linear" load="gaugeLoad" tooltip="tooltip"></ejs-lineargauge>
<script>
    window.gaugeLoad = function (args) {
        var axis = args.gauge.axes[0];
        axis.pointers = [{
            value: 80
        }]
    }
</script>

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2_Core_Application.Models;
using Newtonsoft.Json;
using Syncfusion.EJ2.Charts;
using Syncfusion.EJ2.LinearGauge;


namespace EJ2_Core_Application.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {

            return View();
        }
    }
}

Tooltip Template

Any HTML elements can be displayed in the tooltip by using the template property of the tooltip. You can use the {value} as placeholders in the HTML element to display the pointer values of the corresponding axis.

tagHelper

tooltip-template.cs

@{ 
    var tooltip = new LinearGaugeTooltipSettings
    {
        Enable = true,
        Template = "<div>Pointer: 80 </div>"
    };
}
@using Syncfusion.EJ2
<ejs-lineargauge id="linear" load="gaugeLoad" tooltip="tooltip"></ejs-lineargauge>
<script>
    window.gaugeLoad = function (args) {
        var axis = args.gauge.axes[0];
        axis.pointers = [{
            value: 80
        }]
    }
</script>

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2_Core_Application.Models;
using Newtonsoft.Json;
using Syncfusion.EJ2.Charts;
using Syncfusion.EJ2.LinearGauge;


namespace EJ2_Core_Application.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {

            return View();
        }
    }
}

Customize the Appearance of Tooltip

fill - Specifies fill color for tooltip
border - Specifies tooltip border width and color
textStyle - Specifies the tooltip text style, such as color, font family, font style and font weight

tagHelper

tooltip-appearance.cs

@{ 
    var tooltip = new LinearGaugeTooltipSettings
    {
        Enable = true,
        Fill = "#e5bcbc",
        Border = new LinearGaugeBorder
        {
            Color= "#d80000",
            Width=2
        }
    };
}
@using Syncfusion.EJ2
<ejs-lineargauge id="linear" load="gaugeLoad" tooltip="tooltip"></ejs-lineargauge>
<script>
    window.gaugeLoad = function (args) {
        var axis = args.gauge.axes[0];
        axis.pointers = [{
            value: 80
        }]
    }
</script>

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2_Core_Application.Models;
using Newtonsoft.Json;
using Syncfusion.EJ2.Charts;
using Syncfusion.EJ2.LinearGauge;


namespace EJ2_Core_Application.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {

            return View();
        }
    }
}

Pointer Drag

You can drag and drop either marker or bar pointer over the desired axis value using enableDrag property in the pointer.

tagHelper

pointer-drag.cs

@using Syncfusion.EJ2;
<ejs-lineargauge id="linear" load="gaugeLoad"></ejs-lineargauge>
<script>
    window.gaugeLoad = function (args) {
        var axis = args.gauge.axes[0];
        axis.pointers = [{
            value: 80,
            enableDrag : true
        }]
    }
</script>

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2_Core_Application.Models;
using Newtonsoft.Json;
using Syncfusion.EJ2.Charts;
using Syncfusion.EJ2.LinearGauge;


namespace EJ2_Core_Application.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {

            return View();
        }
    }
}

Contents

Tooltip
Pointer Drag

Contents

Tooltip
Pointer Drag