How to get CascadingDropDown value in PageLoad?

Question

User944339287 posted

Hi guys<g class="gr_ gr_18 gr-alert gr_gramm gr_inline_cards gr_run_anim Punctuation multiReplace" id="18" data-gr-id="18">..</g> <g class="gr_ gr_91 gr-alert gr_tiny gr_spell gr_inline_cards gr_run_anim ContextualSpelling multiReplace" id="91" data-gr-id="91">i</g> wonder how do <g class="gr_ gr_92 gr-alert gr_tiny gr_spell gr_inline_cards gr_run_anim ContextualSpelling multiReplace" id="92" data-gr-id="92">i</g> get SelectedValue of CascadingDropDown in PageLoad?

it's returned empty in PageLoad when i try Me.ddl_country.SelectedValue or Me.cdd_country.SelectedValue

HTML

<asp:DropDownList ID="ddl_country" runat="server" CssClass="DropDownList"></asp:DropDownList>                                                               
<cc1:CascadingDropDown ID="cdd_country" runat="server" category="ParentCat" loadingtext="loading..." promptvalue="Select a country" servicemethod="GetParentCategory"                                                                    servicepath="/webservices/area.asmx" targetcontrolid="ddl_country">
</cc1:CascadingDropDown>

Answer 1

User475983607 posted

You have not provided enough code. 

This best we can do for you is provide blogs and tutorials that explain how to implement the CascadingDropDown.  Please set aside time to learn how to use the CascadingDropDown control.

https://blogs.msdn.microsoft.com/spike/2013/04/10/how-to-create-and-use-cascadingdropdown-from-the-ajaxtoolkit/

http://www.ajaxcontroltoolkit.net/CascadingDropDown/CascadingDropDown.aspx