Internet Explorer Web Controls

Re: TreeView OnSelectedIndexChange Client Side Event Question

seljo — Mon, 29 Sep 2003 22:55:14 GMT

I am having trouble capturing any client side events for this control. Could you post the entire .aspx HTML source for me to compare to mine? I am trying to add nodes dynamically from a DB. I can do this by setting AutoPostback to true, but everytime a click event occurs, the page gets posted back. This is unacceptable! I need to be able to determine in client side script when the page posts back. Any ideas would be greatly appreciated. Here is my aspx HTML code:

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="treeview.aspx.vb" Inherits="ilh.WebForm1"%>
<%@ Register TagPrefix="ie" Namespace="Microsoft.Web.UI.WebControls" Assembly="Microsoft.Web.UI.WebControls" %>
<%@ import namespace="Microsoft.Web.UI.WebControls"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>ILH Browser</title>
<script language="javascript">

</script>

<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 MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">

<asp:button id="Button1" style="Z-INDEX: 101; LEFT: 24px; POSITION: absolute; TOP: 64px" runat="server"
Text="Refresh" Width="65px" Height="24px"></asp:button>

<ie:treeview id="Treeview1" style="Z-INDEX: 102; LEFT: 24px; POSITION: absolute; TOP: 104px"
runat="server" Expanded="false" Autopostback="false" NAME="Treeview1"></ie:treeview>

<asp:label id="lblNodeCount" style="Z-INDEX: 103; LEFT: 104px; POSITION: absolute; TOP: 64px"
runat="server" Width="320px" Height="16px">Number of nodes</asp:label>

</form>
</body>
</HTML>

my vb code:

...

sub page_load()
...
treeview1.atributes.add("onselectedindexchange","js_indexChanged();")
...
end sub

Re: TreeView OnSelectedIndexChange Client Side Event Question

luvnsv — Wed, 21 May 2003 18:16:41 GMT

i also have the same problem getting the text that i clicked on the tree
any idea on how to do?
i'm using vb, can help out?

thanks...

Re: TreeView OnSelectedIndexChange Client Side Event Question

majstor — Wed, 21 May 2003 10:04:01 GMT

It helps and works fine with IE 6.0 but on IE 5.0 window.event.newTreeNodeIndex is undefined and on line
newIndex= window.event.newTreeNodeIndex;
reports an error: "object doesn't support property or method"

Any idea?

Re: TreeView OnSelectedIndexChange Client Side Event Question

MLibby — Mon, 05 May 2003 15:26:50 GMT

Here's the scoop...
Unlike the HTML server controls, for the Web server controls, you cannot simply use the HTML sytax to add cliend-side event handling. The reason is ASP.NET already uses client-side event handling code to perform automatic postback operations. So for Web controls you have to use Attributes.Add(...) to handle the client side click. Here are code snippets...

<HTML>
<HEAD>
<title>Main</title>
...
<script language="javascript">

</script>
</HEAD>
...

C# code:
private void Page_Load(object sender, System.EventArgs e)
{
if (!IsPostBack)
{
// I'm using one of many ways to populate the tree, an xml file.
MyTree.TreeNodeSrcFile = MapPath("EmpReportsTo.tns.xml");
MyTree.Attributes.Add("onselectedindexchange", "myFunction();");
DataBind();
}
}
...

That should be all you need. Let me know if this helps,
Mike

Re: TreeView OnSelectedIndexChange Client Side Event Question

molingw — Mon, 05 May 2003 01:16:34 GMT

hello! i met the same question. i do not how to get the Event when i click the node. because i want to display then node's text which i click.

thank you!

Re: TreeView OnSelectedIndexChange Client Side Event Question

kevin_jones — Mon, 21 Apr 2003 15:25:22 GMT

var Node = MyTree.getTreeNode(Index);
var NodeType = FromNode.getAttribute("type");
var NodeName = FromNode.getAttribute("text");
window.status = "The type is " + Type + " and the name is " + Name + ".";

TreeView OnSelectedIndexChange Client Side Event Question

MLibby — Thu, 17 Apr 2003 20:31:06 GMT

Hello everyone,

I'm able to successfully handle the OnSelectedIndexChange client side event but now how do I get to the text and data of the selected item using the index?

Here is my code:

WebForm1.aspx.cs
...
TreeXmlSql.Attributes.Add("onselectedindexchange", "myFunction();");
...

WebForm1.aspx
...

...

Any help is greatly appeciated,
Mike