Alert me if node not choosed

[sudheer]

Hi

I m using radtreeview in a form in which if user doesn't choose any role in treeview it should alert .  In code behind i m able to find using below code
if (Roletreeview.CheckedNodes.Count < 0)
Page.RegisterStartupScript("error", "<script language='JavaScript'>alert('" + Resources.Resources._1010 + "'); return false; </script>");

bit i want alert user using javascript code

Advanced thanks ,if any help

[Paul]

Hi sudheer,

Please find below a sample code snippet that shows the needed approach.

<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>

<script type="text/javascript">
    function getCheckedNodes() {
        var treeview = $find('<%= RadTreeView1.ClientID %>');
        if (treeview.get_checkedNodes().length == 0) {
            alert("Please select at least one node");
        }
    }
</script>

<telerik:RadTreeView ID="RadTreeView1" runat="server" TriStateCheckBoxes="True" CheckBoxes="true"
    CheckChildNodes="true">
    <Nodes>
        <telerik:RadTreeNode runat="server" Expanded="True" Text="Root RadTreeNode1">
            <Nodes>
                <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 1">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 2">
                </telerik:RadTreeNode>
            </Nodes>
        </telerik:RadTreeNode>
        <telerik:RadTreeNode runat="server" Expanded="True" Text="Root RadTreeNode2">
            <Nodes>
                <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 1">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode runat="server" Expanded="True" Text="Child RadTreeNode 2">
                    <Nodes>
                        <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 1">
                        </telerik:RadTreeNode>
                        <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 2">
                        </telerik:RadTreeNode>
                        <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 3">
                        </telerik:RadTreeNode>
                        <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 4">
                        </telerik:RadTreeNode>
                    </Nodes>
                </telerik:RadTreeNode>
                <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 3">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 4">
                </telerik:RadTreeNode>
            </Nodes>
        </telerik:RadTreeNode>
        <telerik:RadTreeNode runat="server" Expanded="True" Text="Root RadTreeNode3">
            <Nodes>
                <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 1">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 2">
                </telerik:RadTreeNode>
            </Nodes>
        </telerik:RadTreeNode>
    </Nodes>
</telerik:RadTreeView>
<input id="Button1" type="button" value="button" onclick="getCheckedNodes()" /></p>
</form>

Sincerely yours,
Paul
the Telerik team

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