hello!  I have successfully implemented the Ajax Cascading Dropdowns but am running into an issue.  I am databinding the available selections to all three of my dropdown lists.  Then I need to make the selected value of each dropdown a value from my dataset.  The selected value works for the first dropdown, but I cannot figure out how to set up the selected values of the other 2 dropdowns.  (This would be values a user has selected previously, not default values.)

Can anyone assist me?

Thanks in advance!

Hi Stormcadi,

As far as I know,  you should do some modifications on your WebService.You should add a  field to your tabel which get the datas from.  This field indicates that if it is the default selected item under some condition(Based on the former CascadingDropDown's selection).

    [WebMethod]
    public CascadingDropDownNameValue[] GetCities(string knownCategoryValues, string category)
    {
        StringDictionary kv = CascadingDropDown.ParseKnownCategoryValuesString(knownCategoryValues);
        int stateID;
        if (!kv.ContainsKey("State") || !Int32.TryParse(kv["State"], out stateID))
        {
            return null;
        }
        List<CascadingDropDownNameValue> myList = new List<CascadingDropDownNameValue>();
        strSql = "SELECT * FROM tb_City WHERE StateID=" + stateID.ToString();

        GetDr(strSql);
        while (myReader.Read())
        {
            if (myReader["isDefault"].ToString() =="true")
            {
                myList.Add(new CascadingDropDownNameValue(myReader["CityName"].ToString(), myReader["CityID"].ToString(),true));
            }
            else {
                myList.Add(new CascadingDropDownNameValue(myReader["CityName"].ToString(), myReader["CityID"].ToString(),false));
            }
        }
        myReader.Close();
        return myList.ToArray();
    }

Please remove the CascadingDropDown's PromptText property. For example,

       <cc1:CascadingDropDown ID="CascadingDropDown2" BehaviorID="myCDECity" runat="server" TargetControlID="dlCity" ParentControlID="dlState"
            Category="City" ServicePath="../WebService/CityServiceOledb.asmx"
            ServiceMethod="GetCities" LoadingText="Load Text....">
        </cc1:CascadingDropDown>

Best regards,

Jonathan