TextBox::MaxLength Property


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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)

property int MaxLength {
	virtual int get();
	virtual void set(int value);

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.

Exception Condition

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.


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.

A Visual Studio Web site project with source code is available to accompany this topic: Download.

The following code example demonstrates how to use the TextBox control to get user input. When the user clicks the Add button, the sum of the values entered in the text boxes is displayed.

System_CAPS_security Security 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
Available since 1.1
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