Hi....

I have a master page in my website. It has a child page which contains a treeview control on it. Every node of the treeview redirects to a new page (Not a master page's child page) Now I just want that when a user selects a node, the requested page should open in new window. Remaining child pages would be shown in the same window.

Thanks

In ItemDataBound of TreeView, add the client side javascript click event, like following...

e.Item.Attribute.Add("OnClick", "javascript:win=window.open('page.aspx');");

Thanx for answer bt mytreeview is not databound instead it's hand written nodes. 

Do you mean that the new opened window in the same wendow with the child page?   If so, why not use iframe?

NO, I just want that  page (which is a normal page and not a child page of my master page) should open  in new window by clicking on clicking the  treeview node (It is on a master page's child page).

Put a iframe inside of a content page(just as you said, the child page, we call it "content page"), and set the target to this iframe, check this demo code,

<%@ Page Title=" " Language="C#" MasterPageFile="~/main.master" %>

<script runat="server">

</script>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
    <div style="float: left; width: 200px;">
        <asp:TreeView ID="TreeView1" runat="server" Target="iframeDemo">
            <Nodes >
                <asp:TreeNode Text="My Computer">
                    <asp:TreeNode Text="Favorites">
                        <asp:TreeNode Text="News">
                            <asp:TreeNode Text="MSN" NavigateUrl="http://www.msn.com" />
                            <asp:TreeNode Text="MSNBC News" NavigateUrl="http://www.msnbc.msn.com" />
                        </asp:TreeNode>
                    </asp:TreeNode>
                </asp:TreeNode>
            </Nodes>
        </asp:TreeView>
    </div>
    <div style="float: left; width: 1000px;">
        <iframe width="100%" height="800px;" scrolling="no" src="http://www.asp.net" id="iframeDemo" name="iframeDemo">
        </iframe>
    </div>
    <div style="clear: both;">
    </div>
</asp:Content>