ComboBox.MaxDropDownHeight Property

Gets or sets the maximum height for a combo box drop-down.

Namespace: System.Windows.Controls
Assembly: PresentationFramework (in presentationframework.dll)
XML Namespace:

public double MaxDropDownHeight { get; set; }
/** @property */
public double get_MaxDropDownHeight ()

/** @property */
public void set_MaxDropDownHeight (double value)

public function get MaxDropDownHeight () : double

public function set MaxDropDownHeight (value : double)

<object MaxDropDownHeight="double"/>
- or –
<object MaxDropDownHeight ="qualifiedDouble"/>
- or -
<object MaxDropDownHeight ="Auto"/>
 double   Double  String representation of a Double value. This is interpreted as a device-independent unit (1/96th inch) measurement. Strings need not explicitly include decimal points. For instance a value of 1 is acceptable. The same Double range restrictions as mentioned in the Property Value section apply.  qualifiedDouble  A double value as described above, followed by one of the following unit declaration strings: px, in, cm, pt.  px (default) is device-independent units (1/96th inch per unit)  in is inches; 1in==96px  cm is centimeters; 1cm==(96/2.54) px  pt is points; 1pt==(96/72) px  Auto  Enables autosizing behavior. See Remarks. 

Property Value

A double that represents the height that is retrieved or the height to set. The default value as defined to the property system is a calculated value based on taking a one-third fraction of the system max screen height parameters, but this default is potentially overridden by various control templates.

Identifier Field


Metadata Flags


Auto sizing is not the default, and will result in the drop down size potentially exceeding the available size in the parent element. This is not typically desirable.

The following example shows how to use the MaxDropDownHeight property to specify the height of the ComboBox control's drop-down.

<Setter Property = "MaxDropDownHeight" Value="30"/>

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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