📄 html_select.aspx

📁 东软内部材料（四）asp等相关的教学案例　
💻 ASPX
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<%@Page Language="C#"%>
<%@Import Namespace="System.Drawing" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>

<script language="JScript">
<!--
function ShowHTMLContent() {
  var strURL = 'http://<% = Request.ServerVariables["SERVER_NAME"] %><% = Request.Path %>?<% = Request.QueryString %>';
  var strDisplay = new String;
  var objHTTP = new ActiveXObject("microsoft.XMLHTTP")
  objHTTP.open('GET', strURL, false);
  objHTTP.send();
  var strReply = objHTTP.responseText;
  var intStart = strReply.indexOf('<!' + '--start-->') + 12;
  var intEnd = strReply.indexOf('<!' + '--end-->');
  if ((intStart > 0) && (intEnd > intStart))
    var strDisplay = strReply.substring(intStart, intEnd);
  document.all['outHTML'].innerText = strDisplay + ' ';
}
function SetCheck(strCheckboxName) {
  document.all[strCheckboxName].checked = true;
}
//-->
</script>

<!-- #include file="style.inc" -->
</head>
<body bgcolor="#ffffff" onload="ShowHTMLContent()">
<!--------------------------------------------------------------------------->
<span class="heading">HtmlSelect Control</span> &nbsp; &nbsp; &nbsp;

<!--start-->
<select id="MyControl" runat="server" />
<!--end-->

<p />
<div id="outError" runat="server" />
<font face="Courier New" size="2"><div style="background-color:gainsboro; padding-left:10px" id="outHTML">Fetching HTML content...</div></font>

<form runat="server" method="get">
<table border="0">
<tr>
<td nowrap="nowrap"></td><td align="right" nowrap="nowrap">DataSource =</td><td nowrap="nowrap">{Hashtable}</td>
<td nowrap="nowrap">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  &nbsp;</td>
<td nowrap="nowrap"><input type="checkbox" id="chkDataTextField" runat="server" /> Set: &nbsp; </td><td align="right" nowrap="nowrap">DataTextField =</td><td nowrap="nowrap"><select id="selDataTextField" size="1" runat="server" onchange="SetCheck('chkDataTextField')"><option>Key</option><option>Value</option></select></td>
</tr><tr>
<td nowrap="nowrap"><input type="checkbox" id="chkDataValueField" runat="server" /> Set: &nbsp; </td><td align="right" nowrap="nowrap">DataValueField =</td><td nowrap="nowrap"><select id="selDataValueField" size="1" runat="server" onchange="SetCheck('chkDataValueField')"><option>Key</option><option>Value</option></select></td><td></td>
<td nowrap="nowrap"><input type="checkbox" id="chkDisabled" runat="server" /> Set: &nbsp; </td><td align="right" nowrap="nowrap">Disabled =</td><td nowrap="nowrap"><select id="selDisabled" size="1" runat="server" onchange="SetCheck('chkDisabled')"><option>True</option><option>False</option></select></td><td nowrap="nowrap"></td>
</tr><tr>
<td nowrap="nowrap"></td><td align="right" nowrap="nowrap">ID =</td><td nowrap="nowrap"><% = MyControl.ID %></td><td nowrap="nowrap"></td>
<td nowrap="nowrap"><input type="checkbox" id="chkMultiple" runat="server" /> Set: &nbsp; </td><td align="right" nowrap="nowrap">Multiple =</td><td nowrap="nowrap"><select id="selMultiple" size="1" runat="server" onchange="SetCheck('chkMultiple')"><option>True</option><option>False</option></select></td>
</tr><tr>
<td nowrap="nowrap"><input type="checkbox" id="chkSelectedIndex" runat="server" /> Set: &nbsp; </td><td align="right" nowrap="nowrap">SelectedIndex =</td><td nowrap="nowrap"><select id="selSelectedIndex" size="1" runat="server" onchange="SetCheck('chkSelectedIndex')">
<option>-1</option><option>0</option><option>1</option><option>2</option><option>3</option><option>4</option></select></td><td></td>
<td nowrap="nowrap"><input type="checkbox" id="chkSize" runat="server" /> Set: &nbsp; </td><td align="right" nowrap="nowrap">Size =</td><td nowrap="nowrap"><input type="text" size="2" id="txtSize" runat="server" onkeypress="SetCheck('chkSize')" /></td>
</tr><tr>
<td nowrap="nowrap">&nbsp;</td><td align="right" nowrap="nowrap">Value =</td><td nowrap="nowrap"><% = MyControl.Value %></td><td></td>
<td nowrap="nowrap"><input type="checkbox" id="chkVisible" runat="server" /> Set: &nbsp; </td><td align="right" nowrap="nowrap">Visible =</td><td nowrap="nowrap"><select id="selVisible" size="1" runat="server" onchange="SetCheck('chkVisible')"><option>True</option><option>False</option></select></td>
</tr><tr>
<td></td><td></td><td></td><td></td>
<td nowrap="nowrap"><input type="button" Value="Reset" onclick="javascript:location.href='http://<% = Request.ServerVariables["SERVER_NAME"] %><% = Request.Path %>'"></td><td nowrap="nowrap"></td><td nowrap="nowrap"><input type="submit" Value="Update" runat="server" /></td></tr>
</table>
</form>

<script language="C#" runat="server">

	void  Page_Load(Object sender, EventArgs e)
	{
		outError.InnerHtml = "";

		try
		{
			Hashtable tabValues = new Hashtable(5);
			tabValues.Add("Microsoft", 49.56);
			tabValues.Add("Sun", 28.33);
			tabValues.Add("IBM", 55);
			tabValues.Add("Compaq", 20.74);
			tabValues.Add("Oracle", 41.1);
			MyControl.DataSource = tabValues;

			if (IsPostBack)
			{
				if (chkDataTextField.Checked) MyControl.DataTextField = selDataTextField.Value;
				if (chkDataValueField.Checked) MyControl.DataValueField = selDataValueField.Value;
				MyControl.DataBind();
				if (chkDisabled.Checked) MyControl.Disabled = Convert.ToBoolean(selDisabled.Value);
				if (chkMultiple.Checked) MyControl.Multiple = Convert.ToBoolean(selMultiple.Value);
				if (chkSelectedIndex.Checked) MyControl.SelectedIndex = Convert.ToInt32(selSelectedIndex.Value);
				if (chkSize.Checked) MyControl.Size = Convert.ToInt32(txtSize.Value);
				if (chkVisible.Checked) MyControl.Visible = Convert.ToBoolean(selVisible.Value);
			}
			else
			{
				MyControl.DataValueField = "Value";
				MyControl.DataTextField = "Key";
				MyControl.DataBind();
			}

			selDataTextField.Value = MyControl.DataTextField;
			selDataValueField.Value = MyControl.DataValueField;
			selDisabled.Value = MyControl.Disabled.ToString();
			selMultiple.Value = MyControl.Multiple.ToString();
			selSelectedIndex.Value = MyControl.SelectedIndex.ToString();
			txtSize.Value = MyControl.Size.ToString();
			selVisible.Value = MyControl.Visible.ToString();
		}
		catch (Exception objError)
		{
			outError.InnerHtml = "<b>* Error</b>: " + objError.Message + "<p />";
		}
	}
	
</script>

<!--------------------------------------------------------------------------->
<!-- #include file="foot.inc" -->
</body>
</html>
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