I am new to Ajax. I am implementing a cascading dropdown in a telerik RadGrid. I am adding the dropdownList and CascadingDropDown as follows:
DropDownList droplist = new DropDownList();
droplist.ID = "DropDownListOrderTask";
droplist.AutoPostBack = true;
item["OrderTask"].Controls.Add(droplist);
CascadingDropDown ccdOrderTask = new CascadingDropDown();
ccdOrderTask.ID = "ccdOrderTask";
ccdOrderTask.Category = "OrderTask";
ccdOrderTask.TargetControlID = "DropDownListOrderTask";
ccdOrderTask.PromptText = "Select Order Task";
ccdOrderTask.LoadingText = "Loading OrderTask";
ccdOrderTask.ServiceMethod = "BindOrderTask";
ccdOrderTask.ServicePath = "ajaxservice.asmx";
TextBox txt = (TextBox)item["TaskOwner"].Controls[0];
txt.Visible = false;
droplist = new DropDownList();
droplist.ID = "DropDownListTaskOwner";
item["TaskOwner"].Controls.Add(droplist);
CascadingDropDown ccdTaskOwner = new CascadingDropDown();
ccdTaskOwner.ID = "ccdTaskOwner";
ccdTaskOwner.Category = "TaskOwner";
ccdTaskOwner.ParentControlID = "DropDownListOrderTask";
ccdTaskOwner.TargetControlID = "DropDownListTaskOwner";
ccdTaskOwner.PromptText = "Select Task Owner";
ccdTaskOwner.LoadingText = "Loading Task Owner";
ccdTaskOwner.ServiceMethod = "BindTaskOwner";
ccdTaskOwner.ServicePath = "ajaxservice.asmx";
On the PreRender I have the following: protected override void OnPreRender(EventArgs e) { base.OnPreRender(e);
var ajaxManager = RadAjaxManager.GetCurrent(Page);
if(ajaxManager != null)
ajaxManager.AjaxSettings.AddAjaxSetting(this._UpdatePanel, this._RadGrid1, this._RadLoadingPanel);
}
In the ajaxservice.asmx I have the following:
[WebMethod]
public CascadingDropDownNameValue[] BindOrderTask(string knownCategoryValues, string category)
{
OrderRequestTaskTypeTable _orderRequestTaskTypeTable = new OrderRequestTaskType_List().ExecuteTypedDataTable();
List<CascadingDropDownNameValue> orderTaskDetails = new List<CascadingDropDownNameValue>();
foreach(DataRow dtRow in _orderRequestTaskTypeTable.Rows)
{
String orderTaskId = dtRow["OrderRequestTaskTypeId"].ToString();
String orderTaskName = dtRow["DescriptionTaskType"].ToString();
orderTaskDetails.Add(new CascadingDropDownNameValue(orderTaskId, orderTaskName));
}
return orderTaskDetails.ToArray();
}
The first dropDown, DropDownListOrderTask contains no values. On debugging through Firebug it says: ReferenceError: BindOrderTask is not defined I am sure I am missing something but not sure what. Please help me.
