New to Telerik UI for WinForms? Download free 30-day trial

Working with needles

RadialGaugeNeedle is a scale indicator that points to a value. To add a needle to the gauge, you should add it via the RadradialGauge. Items collection.

Figure 1: Needle

radialgauge-understanding-gauge-elements-working-with-needles 001


  • Value - specifies the needle's value.

Figure 2: Value

radialgauge-understanding-gauge-elements-working-with-needles 002

  • Thickness: Controls how thick the needle will be rendered.

  • PointRadiusPercentage: Specifies the outer radius of the needle's start point.

  • InnerPointRadiusPercentage: Specifies the inner radius of the needle's start point.

Figure 3: Inner Radius

radialgauge-understanding-gauge-elements-working-with-needles 003

  • LenghtPercentage: Controls how long the needle will be rendered.

  • BackLenghtPercentage: The value with which the needle juts out from the center point.

Figure 4: Back Length Percentage

radialgauge-understanding-gauge-elements-working-with-needles 004

  • BindValue: Indicates whether the needle's value is bound to the gauge's Value.

Figure 5: Bind Value

radialgauge-understanding-gauge-elements-working-with-needles 005

  • BindOffset: Specifies the value offset of the needle according to the gauge's value.

Figure 6: Offset

radialgauge-understanding-gauge-elements-working-with-needles 006


The ValueChanged event fires when the needle's value is modified.

See Also

In this article