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Backend API
<div>
@{
var dataSource = new List<object>();
var max = 100;
var rnd = new System.Random(0);
for (var i = 0; i < max; i++) {
dataSource.Add(new {
arg = Math.Pow(10, i * 0.1),
val = Math.Log(i + 1) / Math.Log(0.5) + (rnd.NextDouble() - 0.5) * (100 / (i + 1)) + 10
});
}
}
@(Html.DevExtreme().Chart()
.ID("zoomed-chart")
.DataSource(dataSource)
.ArgumentAxis(aa => aa
.ValueMarginsEnabled(false)
.Type(AxisScaleType.Logarithmic)
.Label(l => l.Format(Format.Exponential))
.Grid(g => g.Visible(true))
.MinorGrid(mg => mg.Visible(true))
.MinorTickCount(10)
)
.ResizePanesOnZoom(true)
.Series(s => s.Add())
.Legend(l => l.Visible(false))
)
@(Html.DevExtreme().RangeSelector()
.ID("range-selector")
.DataSource(dataSource)
.Chart(c => c.Series(s => s.Add()))
.Scale(s => s
.Type(RangeSelectorAxisScaleType.Logarithmic)
.Label(l => l.Format(Format.Exponential))
.MinRange(1)
.MinorTickCount(10)
)
.SliderMarker(sm => sm.Format(Format.Exponential))
.Behavior(b => b
.CallValueChanged(ValueChangedCallMode.OnMoving)
.SnapToTicks(false)
)
.OnValueChanged("rangeSelector_valueChanged")
)
</div>
<script>
function rangeSelector_valueChanged(e) {
var zoomedChart = $("#zoomed-chart").dxChart("instance");
zoomedChart.getArgumentAxis().visualRange(e.value);
}
</script>
using DevExtreme.NETCore.Demos.Models.SampleData;
using Microsoft.AspNetCore.Mvc;
using System.Linq;
namespace DevExtreme.NETCore.Demos.Controllers {
public class RangeSelectorController : Controller {
public ActionResult LogarithmicScale() {
return View();
}
}
}