I'm trying to get javascipt select all items in a HTML form <SELECT>
control and submit the form to an asp.net page. For some reason when
the link is clicked, you can see the items all get selected, but then
they are somehow unselected as the form posts. Any idea? My Html and
..net code follows:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>test SELECT</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="Visual Basic .NET 7.1" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5"
name="vs_targetSchema">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<table>
<tbody>
<tr>
<td>
<SELECT multiple size="20" name="ListBox2" id="ListBox2"
style="WIDTH:350px">
<OPTION selected value="Value 1">Text 1</OPTION>
<OPTION>Text 2</OPTION>
<OPTION>Text 3</OPTION>
<OPTION>Text 4</OPTION>
<OPTION>Text 5</OPTION>
<OPTION>Text 6</OPTION>
<OPTION>Text 7</OPTION>
<OPTION>Final option</OPTION>
</SELECT>
</td>
</tr>
<tr>
<td>
<asp:TextBox id="txtOut" runat="server" Columns="60" Rows="10"
TextMode="MultiLine"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<a href="#" onclick="javascript:selectListBox2();">click me</a>
<asp:Button id="Button1" runat="server"
Text="Button"></asp:Button>
</td>
</tr>
</tbody>
</table>
<script>
<!--
function selectListBox2()
{
var iLoop;
for (iLoop = 0; iLoop < document.Form1.ListBox2.length; iLoop++)
{
document.Form1.ListBox2[iLoop].selected = true;
}
document.Form1.submit();
}
// -->
</script>
</form>
</body>
</HTML>
Public Class test_DualList
Inherits System.Web.UI.Page
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
Protected WithEvents Button1 As System.Web.UI.WebControls.Button
Protected WithEvents txtOut As System.Web.UI.WebControls.TextBox
'NOTE: The following placeholder declaration is required by the
Web Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form
Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button1.Click
Dim iLoopRows As Int16
If (IsPostBack) Then
txtOut.Text = Request.Form.Item("ListBox2")
Else
Button1.Attributes.Add("onclick",
"javascript:selectListBox2();")
End If
End Sub
End Class
