HtmlSelect.AddParsedSubObject Method

Adds a parsed child control to the HtmlSelect control.

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

protected:
virtual void AddParsedSubObject (
	Object^ obj
) override
protected void AddParsedSubObject (
	Object obj
)
protected override function AddParsedSubObject (
	obj : Object
)
Not applicable.

Parameters

obj

The parsed child control to add.

Exception typeCondition

HttpException

The child control specified by the obj parameter must be of the type ListItem.

The AddParsedSubObject method is used by ASP.NET to add parsed child controls to the HtmlSelect control.

The following code example demonstrates how to override the AddParsedSubObject method in a custom server control so that it always checks that an instance of the ListItem class is added to the HtmlSelect selected items collection.

No code example is currently available or this language may not be supported.
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" 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>Custom HtmlSelect - AddParsedSubObject - VJ# Example</title>
        <script runat="server">
    void HtmlInputButton1_ServerClick(Object sender, EventArgs e) 
    {
        if (HtmlSelect1.get_SelectedIndex() >= 0) {
            if (HtmlSelect1.get_Multiple() == true) {
                Div1.set_InnerHtml("You selected:");
                for (int i=0; i<=HtmlSelect1.get_Items().get_Count() - 1; i++) {
                    if (HtmlSelect1.get_Items().get_Item(i).
                        get_Selected() == true) {
                        Div1.set_InnerHtml(Div1.get_InnerHtml() 
                            + "<br /> &nbsp;&nbsp; "
                            + HtmlSelect1.get_Items().get_Item(i).get_Value()); 
                    }     
                }
            }
            else {
                Div1.set_InnerHtml("You selected " + HtmlSelect1.get_Value());
            }
        }
        else {
            Div1.set_InnerHtml("You did not select an item.");
        }
    } //HtmlInputButton1_ServerClick
         </script>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom HtmlSelect - AddParsedSubObject - VJ# Example</h3>
            
            <p>
      <aspSample:CustomHtmlSelectAddParsedSubObject 
        id="HtmlSelect1" 
        name="HtmlSelect1"
        runat="server">
        <option value="Option1">Option1</option>
        <option value="Option2">Option2</option>
        <option value="Option3">Option3</option>
      </aspSample:CustomHtmlSelectAddParsedSubObject>
      </p>
      
      <p>
      <input 
        id="HtmlInputButton1" 
        runat="server" 
        type="button" 
        onserverclick="HtmlInputButton1_ServerClick"
        value="Select" 
        name="HtmlInputButton1" />&nbsp;&nbsp;
      </p>
      
      <br />
      <div id="Div1" runat="server" 
        style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px" />
       
        </form>
    </body>
</html>

No code example is currently available or this language may not be supported.
package Samples.AspNet.JSL.Controls;

public class CustomHtmlSelectAddParsedSubObject
    extends System.Web.UI.HtmlControls.HtmlSelect
{
    protected void AddParsedSubObject(Object obj) 
        throws System.Web.HttpException
    {
        // If the object is a ListItem, then add the ListItem to 
        //the Items collection.
        if (obj instanceof System.Web.UI.WebControls.ListItem) {
            get_Items().Add((System.Web.UI.WebControls.ListItem)obj);
        }
        else {
            throw new System.Web.
                HttpException("You cannot have a child control of type " 
                + obj.GetType().get_Name().ToString());
        }
    } //AddParsedSubObject
} //CustomHtmlSelectAddParsedSubObject

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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