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AttributeCollection.Clear Method

Removes all attributes from a server control's AttributeCollection object.

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

public void Clear()

The following example shows how to programmatically remove all attributes from an HTML server control's AttributeCollection object.

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

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

<script runat="server">

    protected void ClearAttribute_Click(object sender, EventArgs e)
    {
        FirstSelect.Attributes.Clear();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>AttributeCollection Example</title>
</head>

 <body>
    <form id="form1" runat="server">
    <div>
    Make a selection:
    <select id="FirstSelect"
            style="font:16pt verdana; background-color:yellow; color:black;" 
            runat="server">
       <option>This</option>
       <option>That</option>
       <option>Other</option>
    </select>
    <br/><br/>

    <input type="submit" 
           id="clearattributes"
           value="clear all attributes" 
           onserverclick="ClearAttribute_Click" 
           runat="server"/>
    </div>
 </form>
 </body>
 </html>

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

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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