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HtmlTextArea.Cols Property

Gets or sets the width (in characters) of the HtmlTextArea control.

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

public int Cols { get; set; }
/** @property */
public int get_Cols ()

/** @property */
public void set_Cols (int value)

public function get Cols () : int

public function set Cols (value : int)

Not applicable.

Property Value

The width (in characters) of the HtmlTextArea control. The default value is -1, which indicates that this property is not set.

Use the Cols property to specify or determine the width (in characters) of the HtmlTextArea control. If you enter text that is longer than the width of the text box, the text automatically continues on the next line of the control.

To control the height of the control, set the Rows property.

The following code example demonstrates how to use the Cols property to control the width of the HtmlTextArea control.

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<script runat="server">

  void SubmitBtn_Click(Object sender, EventArgs e)
    TextArea1.Cols = Convert.ToInt32(Select1.Value);
    Span1.InnerHtml = "You wrote: <br />" + TextArea1.Value;


<html xmlns="" >
   <title>HtmlTextArea Example</title>


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

      <h3>HtmlTextArea Example</h3>

      Enter your comments: <br />

      <textarea rows="2" cols="20" id="TextArea1" 

      <br />
      Select column width: <br />

      <select id="Select1"

         <option value="10" selected="selected"> 10 </option>
         <option value="20"> 20 </option>
         <option value="30"> 30 </option>
         <option value="40"> 40 </option>
         <option value="50"> 50 </option>
         <option value="60"> 60 </option>


      <br /><br />

      <input type="submit"  

      <br />

      <span id="Span1" 
            runat="server" />



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