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Add Method

AttributeCollection.Add Method

Adds an attribute to a server control's AttributeCollection object.

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

'Declaration
Public Sub Add ( _
	key As String, _
	value As String _
)

Parameters

key
Type: System.String

The attribute name.

value
Type: System.String

The attribute value.

If the string in the value parameter contains an ampersand (&), the character is automatically encoded. The resulting HTML representation is "&".

The following example shows how to use the Add method to programmatically add an attribute to an ASP.NET server control AttributeCollection object.

<%@ Page Language="VB" %>

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

<script runat="server">

    Protected Sub SubmitBtn_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        FirstSelect.Attributes.Add("Multiple", "True")
    End Sub
</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" 
            runat="server">
       <option>This</option>
       <option>That</option>
       <option>Other</option>
    </select>
    <br/><br/>

    <input type="submit" 
           id="submitbtn"
           value="modify attribute" 
           onserverclick="submitbtn_click" 
           runat="server"/>
    </div>
 </form>
 </body>
 </html>

.NET Framework

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