Access Parent Page Control in Child User Control

Question

I have an aspx page in which I have Ajax UpdatePanel which has a AJAX Tabcontainer which has 5 tab. In First tab I have a DropDownList for ProductID. In the second tab I have used a UserControl whose parameter needs to be reflected based on productID. I want to Access the DropDownList ProductID in the user control which I am not getting. Part of my code is

DropDownList IDList = (DropDownList)(this.Parent.FindControl("ProductID");

this is not working and I am getting NULL. I also have Tried

DropDownList IDList = (DropDownList)(this.Page.FindControl("ProductID");

Please tell me how I can do this.

As asked Part of necessary code is

<asp:UpdatePanel ID="UpdatePanelTankFormula" runat="server">
    <ContentTemplate>
        <asp:tabcontainer id="TabContainerTankFormula" AutoPostBack="true" runat="server" OnClientActiveTabChanged="clientActiveTabChanged"   activetabindex="0" style="width:100%;">  

           <asp:TabPanel ID="InputDataTab" runat="server"  HeaderText="Data Input">
               <ContentTemplate> 
                   <asp:DropDownList id="TankNameCombo" DataTextField="TankName" runat="server" AutoPostBack="true" DataValueField="customertankid"   width="200px" onclick="javascript:SetHiddenField();">    </asp:DropDownList>
               </ContentTemplate> 
           </asp:TabPanel>

           <asp:TabPanel ID="LacticAcidAdditionTab" runat="server"  HeaderText="Lactic Acid Addition">
               <ContentTemplate> 
                   //My user control
                   <UC:TankNote runat="server" ID="LaticTankNotesUC" GetNoteType="LAC" MEQMode="False"></UC:TankNote> 
               </ContentTemplate> 
           </asp:TabPanel>

        </asp:tabcontainer>
    <ContentTemplate>
</asp:UpdatePanel>

Now in the Code Behind of this User Control I want to access this DropDownList, which I am not getting. For the fix I have define a Public function that return the value of this list. But its a fix not solution.

score 0 · Answer 1 · answered Jun 26 '13 at 05:42

0

You will have something like this in tab control.

 <cc1:TabContainer ID="TabContainer1" runat="server">
    <cc1:TabPanel ID="TabPanel1" runat="server">
        <ContentTemplate>
            <asp:DropDownList id="dropdownlist1" runat="Server"/>
        </ContentTemplate>
    </cc1:TabPanel>

So first you need to find tabPanel1 then find dropdownlist1 like following.

TabContainer TabContainer1= (TabContainer)(this.Page.FindControl("TabContainer1");
if (TabContainer1!=null){
TabPanel TabPanel1= (TabPanel)(this.TabContainer1.FindControl("TabPanel1");
if(TabPanel1 !=null){
DropDownList dropdownlist1= (DropDownList)(this.TabPanel1.FindControl("dropdownlist1");

}}

answered Jun 26 '13 at 05:42

Jalpesh Vadgama

13,653
19
72
94

I am not even getting TabContainer control it shows it NULL, I also tried this for update panel as whole TabContainer is in UpdatePanel, Even that is not working – Rohit Rohela Jun 26 '13 at 06:02
Yes I did, even UpdatePanel control is not coming in the User control – Rohit Rohela Jun 28 '13 at 05:43
I have updated the post with the necessary code. Please check. – Rohit Rohela Jun 29 '13 at 06:17
You should get update panel. In which event you're trying to find the update panel and child control? – Jalpesh Vadgama Jul 01 '13 at 06:20
Yes I should get it but I don't know why it is not coming. I have a button in my user control on that's click event I need the DropDownList – Rohit Rohela Jul 01 '13 at 06:42
If you can upload a small project there for some where then I can help – Jalpesh Vadgama Jul 01 '13 at 09:45
Yes Sure , I'll upload a small project that describe this problem after a while. And thanks for showing interest. – Rohit Rohela Jul 01 '13 at 13:35
http://www.mediafire.com/?p9jff5lfzqo795r I have made small project that describe this problem. Please have a look. Thanks – Rohit Rohela Jul 01 '13 at 14:24

Access Parent Page Control in Child User Control

1 Answers1