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Posted 29 Aug 2012
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(AGauge) WinForms Gauge Control

, 29 Aug 2012
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(AGauge) WinForms Gauge control


Original AGauge control

AGauge is a gauge control for WinForms create by A.J.Bauer using GDI+. The original code was published in "Code Project - A fast and performing gauge" The version that I published here is an improved version of AGauge which contains the following changes.


Dynamic Gauge Label and Gauge Range

Properties for gauge label (previously known as CapText) and range are grouped into GaugeRanges and GaugeLabels which allow us to create any number of range and label as we wish. Range and label can be edited either from code or using the collection editor from the properties window.

System.ComponentModel.Description("Gauge Ranges.")]
public AGaugeRangeCollection GaugeRanges { get { return _GaugeRanges; } }
private AGaugeRangeCollection _GaugeRanges;

System.ComponentModel.Description("Gauge Labels.")]
public AGaugeLabelCollection GaugeLabels { get { return _GaugeLabels; } }
private AGaugeLabelCollection _GaugeLabels;

Besides, each label can use different Font settings since label is an instance of AGaugeLabel.

Added NeedleType Enumeration

AGauge control has 2 different types of needle design selectable from NeedleType property. Type of NeedleType property was changed from Int32 (0 or 1) to enumeration type (NeedleType.Advance or NeedleType.Simple) to avoid invalid entry from user.


Update ValueInRangeChangedEvent

ValueInRangeChangedDelegate was changed to ValueInRangeChangedEvent to allow multiple subscriptions. The event is changed to trigger only if value is entering or leaving a defined range. Besides, ValueInRangeChangedEventArgs was updated to hold current range and gauge value.

[Description("This event is raised if the value is entering or leaving
  defined range.")]
public event EventHandler<ValueInRangeChangedEventArgs> ValueInRangeChanged;
private void OnValueInRangeChanged(AGaugeRange range, Single value)
  EventHandler<ValueInRangeChangedEventArgs> e = ValueInRangeChanged;
  if (e != null) e(this, new ValueInRangeChangedEventArgs(range, value,

/// <summary>
/// Event argument for <see cref="ValueInRangeChanged"/> event.
/// </summary>
public class ValueInRangeChangedEventArgs : EventArgs
  /// <summary>
  /// Affected GaugeRange
  /// </summary>
  public AGaugeRange Range { get; private set; }
  /// <summary>
  /// Gauge Value
  /// </summary>
  public Single Value { get; private set; }
  /// <summary>
  /// True if value is within current range.
  /// </summary>
  public bool InRange { get; private set; }
  public ValueInRangeChangedEventArgs(AGaugeRange range, Single value,
                                          bool inRange)
    this.Range = range;
    this.Value = value;
    this.InRange = inRange;

Added ValueChangedEvent

ValueChanged event is added to notify user whenever gauge value is updated. Note that attempting to set gauge value out of defined gauge range will not trigger this event.

[Description("This event is raised when gauge value changed.")]
public event EventHandler ValueChanged;
private void OnValueChanged()
  EventHandler e = ValueChanged;
  if (e != null) e(this, null);


This article, along with any associated source code and files, is licensed under The zlib/libpng License


  • 28/08/2012: Initial release (Version 2.0.0)


This article, along with any associated source code and files, is licensed under The zlib/libpng License


About the Author

Code Artist
Technical Lead
Malaysia Malaysia
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QuestionDownload error Pin
Member 1184856213-Feb-18 9:05
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Questiongauge doesnt display properly Pin
Member 130262962-Jan-18 18:02
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AnswerRe: gauge doesnt display properly Pin
Code Artist7-Jan-18 0:14
professionalCode Artist7-Jan-18 0:14 
GeneralRe: gauge doesnt display properly Pin
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NewsLink available Pin
kfh3-Jun-17 12:01
memberkfh3-Jun-17 12:01 
QuestionSource Link Pin
Mehmet Erol Çakır25-Apr-17 22:56
memberMehmet Erol Çakır25-Apr-17 22:56 
BugSource link appears to be broken Pin
Leester3375-Apr-17 19:06
memberLeester3375-Apr-17 19:06 
QuestionIf only... Pin
Member 130395905-Mar-17 8:38
memberMember 130395905-Mar-17 8:38 
QuestionGaugeLabels - Example Pin
Member 1260459813-Oct-16 12:40
memberMember 1260459813-Oct-16 12:40 
GeneralMy vote of 5 Pin
Member 1198694816-Jan-16 2:09
memberMember 1198694816-Jan-16 2:09 
QuestionGaugeRanges Pin
mreza805-Oct-15 22:49
membermreza805-Oct-15 22:49 
QuestionCreate Linear Gauges Pin
smsheethal26-Aug-15 2:49
professionalsmsheethal26-Aug-15 2:49 
AnswerRe: Create Linear Gauges Pin
Code Artist1-Sep-15 3:15
memberCode Artist1-Sep-15 3:15 
QuestionUsing the Gauge Pin
Paul Hartland22-Mar-15 6:53
memberPaul Hartland22-Mar-15 6:53 
Questionscale the gauge Pin
dxtr morgan27-Jan-15 7:45
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AnswerRe: scale the gauge Pin
Code Artist28-Jan-15 2:25
memberCode Artist28-Jan-15 2:25 
Questionm_maxValue Pin
jhnlk20-Mar-14 4:12
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QuestionaGauge Closed Pin
Member 992210316-Oct-13 12:10
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AnswerRe: aGauge Closed Pin
Code Artist22-Oct-13 3:46
memberCode Artist22-Oct-13 3:46 
GeneralRe: aGauge Closed Pin
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memberMember 992210323-Oct-13 0:21 
GeneralRe: aGauge Closed Pin
Code Artist23-Oct-13 1:59
memberCode Artist23-Oct-13 1:59 
QuestionPicturebox collection and transparency Pin
N. Henrik Lauridsen7-Aug-13 20:07
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AnswerRe: Picturebox collection and transparency Pin
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GeneralRe: Picturebox collection and transparency Pin
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QuestionChrash on BaseArcStart = 315 & ScaleLinesMajorStepValue = 25 Pin
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