Radcombobox getting access to value from server

[Maxim]

Hi, im trying to get access to the value from the data that is feed by a webservice. The data is displayed well, but I want that when the page load, the first item must be selected in some case, so I need to feed the selected value for this, but I don't have it. So my problem is that I can't access the radcombobox.items from anywhere.

01.<telerik:RadScriptBlock runat="server">
02.  <script type="text/javascript">
03.    function onClientSelectedIndexChangingAddress(sender, eventArgs)
04.    {
05.      if (!eventArgs.get_item() || eventArgs.get_item().get_value() == "")
06.      {
07.        eventArgs.set_cancel(true);
08.      }
09.    }
10.
11.    function onClientSelectedIndexChangedAddress(sender, eventArgs)
12.    {
13.      var idTxtLastSelectedItem = sender.get_id();
14.      idTxtLastSelectedItem = idTxtLastSelectedItem.substring(0, idTxtLastSelectedItem.indexOf("oucAddressDropDownExtended") + 26) + "_txtLastSelectedItem";
15.      document.getElementById(idTxtLastSelectedItem).value = sender.get_text();
16.      sender.clearItems();
17.    }
18.
19.    function onClientItemsRequestingAddress(sender, eventArgs) {
20.      var idTxtLastSelectedItem = sender.get_id();
21.      idTxtLastSelectedItem = idTxtLastSelectedItem.substring(0, idTxtLastSelectedItem.indexOf("oucAddressDropDownExtended") + 26) + "_txtLastSelectedItem";
22.
23.      var txtUserGroupID = document.getElementById("<%= txtUserGroupID.ClientID %>");
24.      var txtUserID = document.getElementById("<%= txtUserID.ClientID %>");
25.      var txtTermChooseAnAddress = document.getElementById("<%= txtTermChooseAnAddress.ClientID %>");
26.      var txtTermAddressNoMatch = document.getElementById("<%= txtTermAddressNoMatch.ClientID %>");
27.      var txtTermAddressResults = document.getElementById("<%= txtTermAddressResults.ClientID %>");
28.      var txtHidePartnerPrincipalAddress = document.getElementById("<%= txtHidePartnerPrincipalAddress.ClientID %>");
29.
30.
31.      var lastItemRequested = document.getElementById(idTxtLastSelectedItem).value;
32.      if (lastItemRequested == sender.get_text()) {
33.        eventArgs._context.Text = "";
34.      }
35.
36.      if (txtUserGroupID.value != "") {
37.        eventArgs.get_context()["UserGroupID"] = txtUserGroupID.value;
38.      }
39.
40.      if (txtUserID.value != "") {
41.        eventArgs.get_context()["UserID"] = txtUserID.value;
42.      }
43.
44.      eventArgs.get_context()["TermChooseAnAddress"] = txtTermChooseAnAddress.value;
45.      eventArgs.get_context()["TermAddressNoMatch"] = txtTermAddressNoMatch.value;
46.      eventArgs.get_context()["TermAddressResults"] = txtTermAddressResults.value;
47.      eventArgs.get_context()["HidePartnerPrincipalAddress"] = txtHidePartnerPrincipalAddress.value;
48.    }
49.
50.  </script>
51.</telerik:RadScriptBlock>

1.<telerik:RadComboBox ID="lstShippingAddress" runat="server" EnableEmbeddedSkins="false" Skin="eCom" MaxHeight="250px" EnableLoadOnDemand="True" EnableVirtualScrolling="True" ShowMoreResultsBox="True" AllowCustomText="true" DropDownWidth="500px" OnClientItemsRequesting="onClientItemsRequestingAddress" OnClientSelectedIndexChanging="onClientSelectedIndexChangingAddress" OnClientSelectedIndexChanged="onClientSelectedIndexChangedAddress" >
2.  <WebServiceSettings Method="GetAddresses" Path="/EcomUtilsWS.asmx" />
3.</telerik:RadComboBox>

[Princy]

Hi Maxim,

When Load-On-Demand is using RadComboBox doesn't loads the items initially. In order to achieve your scenario you have to set the Text in Page_Load event to have this as selected Item in RadComboBox.  Please take a look into this forum thread which discuss about the same scenario.

Thanks,
Princy.

[Maxim]

And what if I don't know what text write ? I won't be able to select the item and that's precisely my problem, because if I know the value I can do as you say and set the text, but I don't know what is the first selected item in the radcombobox is (the value is not set from 0 to n, but are the id of address, so I got no choice but to try to fetch the items or find an other way to set the selectedvalue to the first item in the radcombobox. I don't think it's possible with our current way of doing, but the problem is that I can't change it.

Here is how the RadComboBoxItemData are set on the webservice :

1.Dim itemData As New RadComboBoxItemData()
2.        itemData.Text = EcommerceFunctions.GetAddressDescriptionDropdown(oAddresses.Item(i), oPartner)
3.        itemData.Value = oAddresses.Item(i).Id.ToString
4.        lstResult.Add(itemData)

Thanks !

[Maxim]

I also need to get the value of the first item selected, because I need it for further use, so what Im trying to do is :

myRadComboBox.selectedItem = 0  ' set the first when page load

myValue = myRadComboBox.SelectedValue ' get the value of the first selected item that I set.

or

oAdress = GetFirstAdress() ' retrieve the first item from the radCombobox

[Maxim]

In the end I called the webservice manually from odebehind and returned the data that I needed from it :

01.Dim oRadComboBoxContext As New RadComboBoxContext
02.Dim oEcomUtilsWS As New EcomUtilsWS
03.Dim oRadComboBoxData As RadComboBoxData
04.Dim oRadComboBoxItems As New List(Of RadComboBoxItemData)
05.Try
06.  oRadComboBoxContext.Add("UserID", oUserId)
07.  oRadComboBoxContext.Add("TermChooseAnAddress", String.Empty)
08.  oRadComboBoxContext.Add("termNoAddress", String.Empty)
09.  oRadComboBoxContext.Add("termNoSelection", String.Empty)
10.  oRadComboBoxContext.Add("lstAddressResults", String.Empty)
11.  oRadComboBoxContext.Add("lstAddressNoMatch", String.Empty)
12.  oRadComboBoxContext.Add("TermAddressResults", String.Empty)
13.  oRadComboBoxContext.Add("TermAddressNoMatch", String.Empty)
14.  oRadComboBoxContext.Text = String.Empty
15.  oRadComboBoxContext.NumberOfItems = 0
16.
17.  oRadComboBoxData = oEcomUtilsWS.GetAddresses(oRadComboBoxContext)
18.  oRadComboBoxItems = oRadComboBoxData.Items.ToList
19.Catch ex As Exception
20.  Kcentric.Framework.Diagnostics.Trace.Log(Me.GetType.ToString & "." & New System.Diagnostics.StackFrame().GetMethod.Name, ex)
21.End Try
22.Return oRadComboBoxItems