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MaxLength Property

TextBox::MaxLength Property

Gets or sets the maximum number of characters allowed in the text box.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

[ThemeableAttribute(false)]
public:
virtual property int MaxLength {
	int get ();
	void set (int value);
}
<asp:TextBox MaxLength="Int32" />

Property Value

Type: System::Int32
The maximum number of characters allowed in the text box. The default is 0, which indicates that the property is not set.

ExceptionCondition
ArgumentOutOfRangeException

The specified width is less than 0.

Use the MaxLength property to limit the number of characters that can be entered in the TextBox control.

NoteNote

This property is applicable only when the TextMode property is set to TextBoxMode.SingleLine or TextBoxMode.Password.

This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins.

TopicLocation
How to: Set ASP.NET Web Server Control PropertiesBuilding ASP .NET Web Applications
How to: Set ASP.NET Web Server Control PropertiesBuilding ASP .NET Web Applications

The following code example demonstrates how to use the MaxLength property to limit the number of characters allowed in the TextBox control to 3.

Security noteSecurity Note

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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