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DataBinding issue in RadComboBox through WebService

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ComboBox
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Anjan
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Anjan asked on 02 Nov 2015, 02:30 PM

When we binding the data through web service in RadComboBox, web service method is not calling and data is not binding.

These are my following Code :

.aspx :

 <script type="text/javascript">
        var cb;
        function cb_onDataBound(pComboboxItem, pDropDownLine) {
            var customAttributes = pComboboxItem.get_attributes();

            pDropDownLine.update(
                '<span class="column" style="width:50px;">' + pComboboxItem.get_text().truncate(30, '[...]') + '</span>'
                + '<span class="column" style="width:50px;">' + customAttributes.getAttribute("Company") + '</span>'
                + '<span class="column" style="width:50px;">' + customAttributes.getAttribute("City") + '</span>'

            );
        }
        function pageLoad(sender, args) {            
            initComboExtensions();
            cb = $find("RadComboBox1");
           
            cb.onDataBound = cb_onDataBound;
        }
       
       
    </script>​

<telerik:RadComboBox runat="server"
                ID="RadComboBox1"
                Skin="Default"
                Height="200px"
                Width="200px"
                DropDownWidth="200px"                
                ShowMoreResultsBox="true"
                EnableVirtualScrolling="true"
                ChangeTextOnKeyBoardNavigation="false"
                OnClientItemsRequesting="OnClientItemsRequesting"
                OnClientItemsRequested="OnClientItemsRequested"
                OnClientDropDownOpening="OnClientDropDownOpening"                                
                EnableLoadOnDemand="true">
                <HeaderTemplate>
                    <ul style="list-style: none">
                        <li>
                            <span class="column" style="width: 50px;">ClientID</span>
                            <span class="column" style="width: 50px;">Company</span>
                            <span class="column" style="width: 50px;">City</span>

                        </li>
                    </ul>
                </HeaderTemplate>
                <WebServiceSettings Method="GetClientNames" Path="BindComboboxService.asmx" />
            </telerik:RadComboBox>

 

.asmx :

[WebMethod]
        public RadComboBoxData GetClientNames(RadComboBoxContext context)
        {
            
            DataTable data = objProjectBL.PopulateClientCombo();
            List<RadComboBoxItemData> result = new List<RadComboBoxItemData>(context.NumberOfItems);
            RadComboBoxData comboData = new RadComboBoxData();
            try
            {

                int itemsPerRequest = 10;
                int itemOffset = context.NumberOfItems;
                int endOffset = itemOffset + itemsPerRequest;
                if (endOffset > data.Rows.Count)
                {
                    endOffset = data.Rows.Count;
                }
                if (endOffset == data.Rows.Count)
                {
                    comboData.EndOfItems = true;
                }
                else
                {
                    comboData.EndOfItems = false;
                }
                result = new List<RadComboBoxItemData>(endOffset - itemOffset);
                for (int i = itemOffset; i < endOffset; i++)
                {
                    RadComboBoxItemData itemData = new RadComboBoxItemData();
                    itemData.Text = data.Rows[i]["ClientID"].ToString();
                    itemData.Value = data.Rows[i]["ClientID"].ToString();
                    itemData.Attributes["Company"] = data.Rows[i]["Company"].ToString();
                    itemData.Attributes["City"] = data.Rows[i]["City"].ToString();
                    result.Add(itemData);
                }

                if (data.Rows.Count > 0)
                {
                    comboData.Message = String.Format("Items <b>1</b>-<b>{0}</b> out of <b>{1}</b>", endOffset.ToString(), data.Rows.Count.ToString());
                }
                else
                {
                    comboData.Message = "No matches";
                }
            }
            catch (Exception e)
            {
                comboData.Message = e.Message;
            }

            comboData.Items = result.ToArray();
            return comboData;
        }​

3 Answers, 1 is accepted

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Bozhidar
Telerik team
answered on 05 Nov 2015, 08:12 AM
Hi,

I tested the provided code, and after I removed the dependencies to the underlying data layer, the combobox is working properly. I've attached the sample page I used for testing. Could you verify if it's working on your end as well?

Regards,
Bozhidar
Telerik
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Anjan
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answered on 05 Nov 2015, 02:09 PM

Hi, 

It is working your code. But my scenario is different. I need to populate multiple column in RadComboBox. Please help that one.

0
Bozhidar
Telerik team
answered on 10 Nov 2015, 08:02 AM
Hi,

In order to help you with your specific scenario, we would need the relevant code. Please send us the modifications needed to the sample I send you, so that we can troubleshoot the exact case.

Regards,
Bozhidar
Telerik
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Bozhidar
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Anjan
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