📄 aspnet_arraylist.asp
字号:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang="en-US" xml:lang="en-US" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>ASP.NET ArrayList</title>
<link rel="shortcut icon" href="../favicon.ico" type="image/x-icon" />
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<meta name="Keywords" content="xml,tutorial,html,dhtml,css,xsl,xhtml,javascript,asp,ado,vbscript,dom,sql,colors,soap,php,authoring,programming,training,learning,beginner's guide,primer,lessons,school,howto,reference,examples,samples,source code,tags,demos,tips,links,FAQ,tag list,forms,frames,color table,w3c,cascading style sheets,active server pages,dynamic html,internet,database,development,Web building,Webmaster,html guide" />
<meta name="Description" content="Free HTML XHTML CSS JavaScript DHTML XML DOM XSL XSLT RSS AJAX ASP ADO PHP SQL tutorials, references, examples for web building." />
<meta http-equiv="pragma" content="no-cache" />
<meta http-equiv="cache-control" content="no-cache" />
<link rel="stylesheet" type="text/css" href="../stdtheme.css" />
<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ? "../../https@ssl./default.htm" : "../../www./default.htm");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
var pageTracker = _gat._getTracker("UA-3855518-1");
pageTracker._initData();
pageTracker._trackPageview();
</script>
</head>
<body>
<a name="top"></a>
<table cellpadding="0" cellspacing="0" width="100%" bgcolor="#808080">
<tr>
<td width="234" valign="top">
<a href="../default.htm"><img src="../images/w3default80.jpg" border="0" alt="W3Schools" /></a>
</td>
<th valign="middle" align="left" class="right">
<iframe style="background-color:#808080" src="../banners/bannerframe.asp@adpartner=dundas" height="90" width="728"
marginwidth="0" marginheight="0" frameborder="0" scrolling="no">
Your browser does not support inline frames or is currently configured not to display inline frames.
</iframe>
<br /></th>
</tr>
</table>
<table style="margin-left:1px" width="800px" border="0" cellpadding="0" cellspacing="2">
<tr>
<td width="137" class="content" valign="top"><br />
<a class="left" href="../default.asp" target="_top">
<img src="../images/homeicon.gif" border="0" alt="home" /></a>
<a class="left" href="../default.asp" target="_top">
<b>HOME</b></a>
<br /><br />
<b>ASP.NET Tutorial</b>
<br />
<a class="left" target="_top" href="default.asp" >.NET HOME</a><br />
<a class="left" target="_top" href="aspnet_intro.asp" >.NET Intro</a><br />
<a class="left" target="_top" href="aspnet_vsasp.asp" >.NET vs ASP</a><br />
<a class="left" target="_top" href="aspnet_install.asp" >.NET Install</a><br />
<a class="left" target="_top" href="aspnet_pages.asp" >.NET Pages</a><br />
<a class="left" target="_top" href="aspnet_controls.asp" >.NET Controls</a><br />
<a class="left" target="_top" href="aspnet_events.asp" >.NET Events</a><br />
<br />
<b>ASP.NET Forms</b><br />
<a class="left" target="_top" href="aspnet_forms.asp" >.NET Forms</a><br />
<a class="left" target="_top" href="aspnet_viewstate.asp" >.NET ViewState</a><br />
<a class="left" target="_top" href="aspnet_textbox.asp" >asp:TextBox</a><br />
<a class="left" target="_top" href="aspnet_button.asp" >asp:Button</a><br />
<br />
<b>ASP.NET Binding</b><br />
<a class="left" target="_top" href="aspnet_databinding.asp" >Data Binding</a><br />
<a class="left" target="_top" href="aspnet_arraylist.asp" style='font-weight:bold;'>ArrayList</a><br />
<a class="left" target="_top" href="aspnet_hashtable.asp" >Hashtable</a><br />
<a class="left" target="_top" href="aspnet_sortedlist.asp" >SortedList</a><br />
<a class="left" target="_top" href="aspnet_xml.asp" >XML Files</a><br />
<a class="left" target="_top" href="aspnet_repeater.asp" >asp:Repeater</a><br />
<a class="left" target="_top" href="aspnet_datalist.asp" >asp:DataList</a><br />
<br />
<b>ASP.NET Database</b><br />
<a class="left" target="_top" href="aspnet_dbconnection.asp" >.NET DB Connection</a><br />
<br />
<b>ASP.NET 2.0</b><br />
<a class="left" target="_top" href="aspnet_newfeatures.asp" >2.0 New Features</a><br />
<a class="left" target="_top" href="aspnet_masterpages.asp" >2.0 Master Pages</a><br />
<a class="left" target="_top" href="aspnet_navigation.asp" >2.0 Navigation</a><br />
<br />
<b>References</b><br />
<a class="left" target="_top" href="aspnet_refhtmlcontrols.asp" >HTML Controls</a><br />
<a class="left" target="_top" href="aspnet_refwebcontrols.asp" >Web Controls</a><br />
<a class="left" target="_top" href="aspnet_refvalidationcontrols.asp" >Validation Controls</a><br />
<br />
<b>Examples</b><br />
<a class="left" target="_top" href="aspnet_examples.asp" >ASP.NET Examples</a><br />
<br />
<b>Selected Reading</b><br />
<a class="left" target="_top" href="../browsers/browsers_stats.asp">Web Statistics</a><br />
<a class="left" target="_top" href="../site/site_glossary.asp">Web Glossary</a><br />
<a class="left" target="_top" href="../hosting/default.asp">Web Hosting</a><br />
<a class="left" target="_top" href="../quality/default.asp">Web Quality</a><br /><br />
<a class="left" target="_top" href="../forum/default.asp">W3Schools Forum</a><br /><br />
<a class="left" target="_top" href="../about/about_helping.asp">Helping W3Schools</a><br /><br />
<script type="text/javascript"><!--
google_ad_client = "pub-3440800076797949";
/*LeftLinkUnit*/
google_ad_slot = "4854527104";
google_ad_width = 120;
google_ad_height = 90;
//-->
</script>
<script type="text/javascript"
src="../../pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</td>
<td valign="top">
<table style="border: 1px solid gray" width="100%" bgcolor="#FFFFFF" border="0" cellpadding="5" cellspacing="0">
<tr>
<td>
<h1>ASP.NET - The ArrayList Object</h1>
<a href="aspnet_databinding.asp"><img alt="previous" border="0" src="../images/btn_previous.gif" /></a>
<a href="aspnet_hashtable.asp"><img alt="next" border="0" src="../images/btn_next.gif" /></a>
<hr />
<p class="intro">The ArrayList object is a collection of items containing a
single data value.</p>
<hr />
<h2>Examples</h2>
<p><a target="_blank" href="showasp.asp@filename=demo_arraylist_radio1">Example 1 - ArrayList RadioButtonList</a></p>
<p><a target="_blank" href="showasp.asp@filename=demo_arraylist_drop1">Example 2 - ArrayList DropDownList</a></p>
<hr />
<h2>Create an ArrayList</h2>
<p>The ArrayList object is a collection of items containing a single data value.</p>
<p>Items are added to the ArrayList with the Add() method.</p>
<p>The following code creates a new ArrayList object named
mycountries and four items are added:</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><script runat="server">
Sub Page_Load
if Not Page.IsPostBack then
dim mycountries=New ArrayList
mycountries.Add("Norway")
mycountries.Add("Sweden")
mycountries.Add("France")
mycountries.Add("Italy")
end if
end sub
</script></pre>
</td></tr>
</table>
<p>By default, an ArrayList object contains 16 entries. An ArrayList
can be sized to its final size with the TrimToSize() method:</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><script runat="server">
Sub Page_Load
if Not Page.IsPostBack then
dim mycountries=New ArrayList
mycountries.Add("Norway")
mycountries.Add("Sweden")
mycountries.Add("France")
mycountries.Add("Italy")
mycountries.TrimToSize()
end if
end sub
</script></pre>
</td></tr>
</table>
<p>An ArrayList can also be sorted alphabetically or numerically with the Sort()
method:</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><script runat="server">
Sub Page_Load
if Not Page.IsPostBack then
dim mycountries=New ArrayList
mycountries.Add("Norway")
mycountries.Add("Sweden")
mycountries.Add("France")
mycountries.Add("Italy")
mycountries.TrimToSize()
mycountries.Sort()
end if
end sub
</script></pre>
</td></tr>
</table>
<p>To sort in reverse order, apply the Reverse() method
after the Sort() method:</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><script runat="server">
Sub Page_Load
if Not Page.IsPostBack then
dim mycountries=New ArrayList
mycountries.Add("Norway")
mycountries.Add("Sweden")
mycountries.Add("France")
mycountries.Add("Italy")
mycountries.TrimToSize()
mycountries.Sort()
mycountries.Reverse()
end if
end sub
</script></pre>
</td></tr>
</table>
<br />
<hr />
<h2>Data Binding to an ArrayList</h2>
<p>An ArrayList object may automatically generate the text and values to the following controls:</p>
<ul>
<li>asp:RadioButtonList</li>
<li>asp:CheckBoxList</li>
<li>asp:DropDownList</li>
<li>asp:Listbox</li>
</ul>
<p>To bind data to a RadioButtonList control, first create a RadioButtonList control (without
any asp:ListItem elements) in an .aspx page:</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><html>
<body></pre>
<pre><form runat="server">
<asp:RadioButtonList id="rb" runat="server" />
</form></pre>
<pre></body>
</html></pre>
</td></tr>
</table>
<p>Then add the script that builds the list and binds the values
in the list to the RadioButtonList control:</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><script runat="server">
Sub Page_Load
if Not Page.IsPostBack then
dim mycountries=New ArrayList
mycountries.Add("Norway")
mycountries.Add("Sweden")
mycountries.Add("France")
mycountries.Add("Italy")
mycountries.TrimToSize()
mycountries.Sort()
rb.DataSource=mycountries
rb.DataBind()
end if
end sub
</script></pre>
<pre><html>
<body></pre>
<pre><form runat="server">
<asp:RadioButtonList id="rb" runat="server" />
</form></pre>
<pre></body>
</html></pre>
</td></tr>
</table>
<p>The DataSource
property of the RadioButtonList control is set to the ArrayList and it defines the
data source of the
RadioButtonList control. The DataBind() method of the RadioButtonList control binds the data source with
the RadioButtonList control.</p>
<p><b>Note:</b> The data values are used as both the Text
and Value properties for the control. To add Values that are different from the Text, use either
the Hashtable object or the SortedList object.</p>
<hr />
<a href="aspnet_databinding.asp"><img alt="previous" border="0" src="../images/btn_previous.gif" /></a>
<a href="aspnet_hashtable.asp"><img alt="next" border="0" src="../images/btn_next.gif" width="100" height="20" /></a>
<br />
<hr />
<!-- **** SPOTLIGHTS 1 **** -->
<iframe src="../banners/aspallframe.asp" height="110" width="485"
marginwidth="0" marginheight="0" frameborder="0" scrolling="no">
Your browser does not support inline frames or is currently configured not to display inline frames.
</iframe>
<hr />
<!-- **** SPOTLIGHTS 2 **** -->
<!-- **** SPOTLIGHTS 3 **** -->
<table cellpadding="0" cellspacing="0"><tr><td width="72"></td><td>
<script type="text/javascript"><!--
google_ad_client = "pub-3440800076797949";
/*txt*/
google_ad_slot = "1699448869";
google_ad_width = 336;
google_ad_height = 280;
//-->
</script>
<script type="text/javascript"
src="../../pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</td></tr></table>
<hr />
<center>
<script type="text/javascript"><!--
google_ad_client = "pub-3440800076797949";
/*imgtxt*/
google_ad_slot = "8606855891";
google_ad_width = 468;
google_ad_height = 60;
//-->
</script>
<script type="text/javascript"
src="../../pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</center>
<hr />
<!-- **** END SPOTLIGHTS **** -->
</td></tr>
<tr><td>
<p>Jump to: <a href="#top" target="_top"><b>Top of Page</b></a>
or <a href="../default.asp" target="_top"><b>HOME</b></a> or
<a href='aspnet_arraylist.asp@output=print' target="_blank">
<img src="../images/print.gif" alt="Printer Friendly" border="0" />
<b>Printer friendly page</b></a></p>
<p>W3Schools provides material for training only. We do not warrant the correctness of its contents.
The risk from using it lies entirely with the user.
While using this site, you agree to have read and accepted our
<a href="../about/about_copyright.asp">terms of use</a> and
<a href="../about/about_privacy.asp">privacy policy</a>.
</p>
<p><a href="../about/about_copyright.asp">Copyright 1999-2008</a> by Refsnes Data. All Rights Reserved.</p>
<table border="0" width="100%" cellspacing="0" cellpadding="0"><tr>
<td width="60%" align="left">
<a href="../../validator.w3.org/check@uri=referer" target="_blank">
<img src="../images/vxhtml.gif" alt="Validate" width="88" height="31" border="0" /></a>
<a href="../../jigsaw.w3.org/css-validator/check@uri=referer" target="_blank">
<img src="../images/vcss.gif" alt="Validate" width="88" height="31" border="0" /></a>
<a href="../../www.w3.org/WAI/WCAG1A-Conformance" title="Explanation of Level A Conformance" target="_blank">
<img src="../images/wai.gif" alt="W3C-WAI level A conformance icon" width="88" height="31" border="0" /></a>
</td>
<td>
<a href="../xhtml/xhtml_howto.asp" target="_top">W3Schools was converted to XHTML in December 1999</a>
</td></tr>
</table>
</td></tr>
</table>
</td>
<td width="145" align="center" valign="top">
<iframe style="background-color:#f1f1f1" src="../banners/rightcolumn.asp@secid=dotnet" height="1850" width="147"
marginwidth="0" marginheight="0" frameborder="0" scrolling="no">
</iframe>
</td>
</tr></table>
</body>
</html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -