The C1LinearGaugeExtender control supports logarithmic gauges. This example will show how you can control the ticks' nonuniform use using the Islogarithmic and LogarithmicBase properties. You'll add a gauge and a check box that will allow you to select at run time if the gauge should be displayed as logarithmic or not.

Complete the following steps:

1. Create a new ASP.NET Web application.

2. In the Solution Explorer, right-click the project and choose Add Reference. Locate and add a reference to the C1.Web.Wijmo.Extenders assembly.
3. Switch to Source view, and add the following markup at the top of the page to register the assembly:

<%@ Register Assembly="C1.Web.Wijmo.Extenders.4" Namespace="C1.Web.Wijmo.Extenders.C1Gauge" TagPrefix="Gauge" %>

4. Note that you may need to edit the above depending on the assembly you are using.
5. Add the following markup within the main <div> tag to add a Panel with content and set the linear gauge extender:

<asp:Panel ID="linearGauge" runat="server"></asp:Panel>

<Gauge:C1LinearGaugeExtender runat="server" ID="LinearGaugeExtender1" Height="80" Width="400" TargetControlID="linearGauge" Value="50" Islogarithmic="true">

    <Labels>

        <LabelStyle FontSize="12pt" FontWeight="800">

            <Fill Color="#1E395B"></Fill>

        </LabelStyle>

    </Labels>

    <Pointer Shape="Rect" Length="0.5">

        <PointerStyle Stroke="#1E395B">

            <Fill Color="#1E395B"></Fill>

        </PointerStyle>

    </Pointer>

    <TickMajor Position="Inside" Factor="2" Interval="20">

        <TickStyle StrokeWidth="0">

            <Fill Color="#1E395B"></Fill>

        </TickStyle>

    </TickMajor>

    <TickMinor Visible="true" Interval="4" Position="Inside">

        <TickStyle StrokeWidth="0">

            <Fill Color="#1E395B"></Fill>

        </TickStyle>

    </TickMinor>

    <Animation Duration="2000" Easing="EaseOutBack"></Animation>

    <Face>

        <FaceStyle Stroke="#7BA0CC" StrokeWidth="4">

            <Fill ColorBegin="White" ColorEnd="#D9E3F0" LinearGradientAngle="270" Type="LinearGradient"></Fill>

        </FaceStyle>

    </Face>

</Gauge:C1LinearGaugeExtender>

This will add a styled gauge to the page.

6. Add the following markup just below the gauge markup to add a check box and initialize it:

<input type="checkbox" id="checkbox1" checked="checked" />

<label for="checkbox1">IsLogarithmic</label>

<script type="text/javascript">

    $(document).ready(function () {

        $("#checkbox1").change(function () {

            $("#<%= linearGauge.ClientID %>").wijlineargauge("option", "islogarithmic", $(this).is(":checked"));

        });

    });    

</script>

What You've Accomplished

Press F5 to run your application,  notice that the gauge displayed has a logarithmic scale. Deselect the check box to return the gauge to its default view.