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ComboBox.ShouldPreserveUserEnteredPrefix Property

.NET Framework 4.5

Gets or sets a value that indicates whether the ComboBox keeps the user's input or replaces the input with a matching item.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public bool ShouldPreserveUserEnteredPrefix { get; set; }
<object ShouldPreserveUserEnteredPrefix="bool" .../>

Property Value

Type: System.Boolean
true if the ComboBox keeps the user's input; false if the ComboBox replaces the input with a matching item The registered default is false. For more information about what can influence the value, see Dependency Property Value Precedence.

Identifier field


Metadata properties set to true


By default, when the user types a string into the ComboBox that matches one of its items, the item is selected and the text that the user typed is replaced. This can cause the text that the user entered to change case. If the ShouldPreserveUserEnteredPrefix property is set to true, the ComboBox selects the matching item, but preserves the text that the user entered. For example, suppose that a ComboBox contains the string, "Hello" (with a capital H) and the user enters "hello" (with a lowercase h). If ShouldPreserveUserEnteredPrefix is false, the ComboBox selects the matching item, "Hello," in its collection and populates its text box with that string. If ShouldPreserveUserEnteredPrefix is true, "Hello" is selected from the collection, but the text box says "hello."

.NET Framework

Supported in: 4.6, 4.5

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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