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Can't find Combobox

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ComboBox

This is a migrated thread and some comments may be shown as answers.

Daniel asked on 17 Oct 2013, 01:23 PM

Hi Guys, i hope someone can help me with my Problem.

It adding a bunch of RadComboBox dynamiclly on PageLoad to my Page. This works without Problems.
But if i want to find any Combobox by $find i always get Null back.

Has this something to do with kind of adding?

Here is my Code:

Public Sub MenuHrefAnlegen(ByVal endVal As Integer, ByVal strArrQuerystring As Array)

Dim width As String = "width:199px;"

Dim count As Integer = 1

Dim i As Integer

Dim startval As Integer

startval = 1

For i = startval To endVal

'erzeuge menü element

Dim combo As New RadComboBox()

combo.ID = "rcbHrefAuswaehlen" & count

combo.EnableLoadOnDemand = True

combo.Skin = "Metro"

combo.Items.Insert(0, New RadComboBoxItem("Über uns", String.Empty))

combo.Items.Insert(1, New RadComboBoxItem("Baufinanzierung", String.Empty))

combo.Items.Insert(2, New RadComboBoxItem("Denkmal-Immobilien", String.Empty))

combo.Items.Insert(3, New RadComboBoxItem("Photovoltaik", String.Empty))

combo.Items.Insert(4, New RadComboBoxItem("Assekuranz", String.Empty))

combo.Items.Insert(5, New RadComboBoxItem("Kontaktseite", String.Empty))

combo.Items.Insert(6, New RadComboBoxItem("Impressum", String.Empty))

combo.Items.Insert(7, New RadComboBoxItem("Benutzerdefinierte Seite", String.Empty))

Dim hfMenuElement As New HiddenField

hfMenuElement.ID = "hfMenuElement" + count.ToString()

hfMenuElement.Value = strArrQuerystring(count)

MenuAusMenuPunktenZusammengesetzt.Controls.Add(New LiteralControl("<li class=""floatKill""><a href=""#"" id=""hrefm" & count & """ runat=""server"" onmouseover=""menuov('menuleft" & count & "', 'menupuffer" & count & "', 'menuright" & count & "');"" onmouseout=""menuovf('menuleft" & count & "', 'menupuffer" & i & "', 'menuright" & count & "');""><div id=""menuleft" & count & """ class=""menu_left""></div><div id=""menupuffer" & count & """ class=""menu_puffer"" style=""" & width & """>" & strArrQuerystring(count) & "</div><div id=""menuright" & count & """ class=""menu_right""></div></a><div class=""pfeil links"" style=""margin-left:15px;margin-top:8px;""></div><div class=""pfeil links"" style=""margin-top:8px;""></div><div class=""pfeil links"" style=""margin-right:15px;margin-top:8px;""></div></li>"))

MenuAusMenuPunktenZusammengesetzt.Controls.Add(combo)

MenuAusMenuPunktenZusammengesetzt.Controls.Add(hfMenuElement)

count += 1

Next

End Sub

And my find function:

function CollectMenuElementeWithHref(sender, eventArgs) {

var VID = $('input[id$=hfVermittlerID]').val();

var obj = { ID: VID };

for (var i = 1; i < 9; i++) {

var hfVal = $('[id$=hfMenuElement' + i + ']').val();

//At this point i get Null back

var combo = $find("<%= rcbHrefAuswaehlen" + i + ".ClientID %>");

var item = combo.get_items().getItem(2);

if (hfVal) {

obj["pa" + i] = hfVal

obj["href" +1] = item.get_text()

}

eventArgs.set_cancel(true);

window.location.href = 'VermittlerBearbeiten.aspx?' + $.param(obj);

}

Thank you for reading :)
Daniel

4 Answers, 1 is accepted

answered on 18 Oct 2013, 03:32 AM

Hi Daniel,

Please have a look into the sample code that I tried to access a dynamically created RadComboBox in JavaScript.

ASPX:

<telerik:RadMenu ID="RadMenu1" runat="server" OnClientItemClicked="OnClientItemClicked1">

<Items>

<telerik:RadMenuItem Text="Menu1" runat="server">

</telerik:RadMenuItem>

</Items>

</telerik:RadMenu>

C#:

protected void Page_Load(object sender, EventArgs e)

{

RadComboBox combo = new RadComboBox();

combo.ID = "RadComboBox1";

combo.Skin = "Metro";

combo.EnableLoadOnDemand = true;

combo.Items.Insert(0,new RadComboBoxItem("Item1","1"));

combo.Items.Insert(1,new RadComboBoxItem("Item2","2"));

combo.Items.Insert(2,new RadComboBoxItem("Item3","3"));

combo.Items.Insert(3,new RadComboBoxItem("Item4","4"));

combo.Items.Insert(4,new RadComboBoxItem("Item5","5"));

RadMenu1.Controls.Add(combo);

}

JavaScript:

<script type="text/javascript">

function OnClientItemClicked1(sender, args) {

var combobox = $find('<%= RadMenu1.FindControl("RadComboBox1").ClientID %>');//accessing radcombobox

}

</script>

Hope this will helps you.
Thanks,
Shinu.

answered on 18 Oct 2013, 08:01 AM

Okay thank you, i will try this.
But for understanding, does it only work in this way and if yes, why?

EDIT:

Unfortunately it still not working.
I can creat the Combobox like in your example. But if i wanna get the value by javascript, i still can't find the Control.
What i'm doing wrong? :/

I tried it like this:

function CollectMenuElementeWithHref(sender, eventArgs) {

....

//Still get Null back

var combobox = $find('<%= RadMenu1.FindControl("<%= rcbHrefAuswaehlen" + i + ".ClientID %>").ClientID %>');//accessing radcombobox

//This also not working

        //var combobox = $find('<%= RadMenu1.FindControl("rcbHrefAuswaehlen' + i + '").ClientID %>');//accessing radcombobox

        var

item = combobox.get_items().getItem(2);

....

}

        <asp:Panel ID="pnlErsteMenuesAnlegenSchritt3" runat="server">

            <telerik:RadMenu ID="RadMenu1" runat="server">
                <Items>
                    <telerik:RadMenuItem Text="Menu1" runat="server">
                    </telerik:RadMenuItem>
                </Items>
            </telerik:RadMenu>

            <telerik:RadButton ID="rtbnMenuElementeHrefEingabeVerarbeiten" runat="server" Text="Weiter" OnClientClicking="CollectMenuElementeWithHref"></telerik:RadButton>
        </asp:Panel>