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TextBox.TextMode Property

Gets or sets the behavior mode (single-line, multiline, or password) of the TextBox control.

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

[ThemeableAttribute(false)] 
public virtual TextBoxMode TextMode { get; set; }
/** @property */
public TextBoxMode get_TextMode ()

/** @property */
public void set_TextMode (TextBoxMode value)

public function get TextMode () : TextBoxMode

public function set TextMode (value : TextBoxMode)

Not applicable.

Property Value

One of the TextBoxMode enumeration values. The default value is SingleLine.

Exception typeCondition

ArgumentOutOfRangeException

The specified mode is not one of the TextBoxMode enumeration values.

Use the TextMode property to specify whether a TextBox control is displayed as a single-line, multiline, or password text box.

When the TextBox control is in multiline mode, you can control the number of rows displayed by setting the Rows property. You can also specify whether the text should wrap by setting the Wrap property.

If the TextBox control is in password mode, all characters entered in the control are masked.

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

The following code example demonstrates how to use the TextMode property to specify a multiline text box.

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 (Visual Studio).

<%@ Page Language="C#" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" > 

<head>
    <title> MultiLine TextBox Example </title>
<script runat="server">

      protected void SubmitButton_Click(Object sender, EventArgs e)
      {
         
         Message.Text = "Thank you for your comment: <br />" + Comment.Text;

      }

      protected void Check_Change(Object sender, EventArgs e)
      {
         
         Comment.Wrap = WrapCheckBox.Checked;
         Comment.ReadOnly = ReadOnlyCheckBox.Checked;

      }

   </script>

</head>

<body>

   <form id="form1" runat="server">

      <h3> MultiLine TextBox Example </h3>

      
      Please enter a comment and click the submit button. 

      <br /><br /> 
            
      <asp:TextBox ID="Comment"
           TextMode="MultiLine"
           Columns="50"
           Rows="5"
           runat="server"/>

      <br />

      <asp:RequiredFieldValidator
           ID="Value1RequiredValidator"
           ControlToValidate="Comment"
           ErrorMessage="Please enter a comment.<br />"
           Display="Dynamic"
           runat="server"/>                         

      <asp:CheckBox ID="WrapCheckBox"
           Text="Wrap Text"
           Checked="True"
           AutoPostBack="True"
           OnCheckedChanged="Check_Change"
           runat="server"/>

      &nbsp;&nbsp;

      <asp:CheckBox ID="ReadOnlyCheckBox"
           Text="ReadOnly"
           Checked="False"
           AutoPostBack="True"
           OnCheckedChanged="Check_Change"
           runat="server"/>

      &nbsp;&nbsp;

      <asp:Button ID="SubmitButton"
           Text="Submit"
           OnClick="SubmitButton_Click"
           runat="server"/>

      <hr />

      <asp:Label ID="Message"
           runat="server"/>

   </form>

</body>
</html>

Windows 98, Windows Server 2000 SP4, 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, 2.0, 1.1, 1.0

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