How to get controls from a placeholder

[Peny]

Hello,

I have a placeholder inside an update panel as showing in the below Code block.

<tr>
<td>
<asp:UpdatePanel ID="UpdatePanel36" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:PlaceHolder runat="server" ID="Fields">
</asp:PlaceHolder>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="DropDownList2" />
</Triggers>
</asp:UpdatePanel>
</td>
</tr>

I dynamically create some Comboboxes as showing below

.....
Dim dropDownList As DropDownList
dropDownList = New DropDownList
dropDownList.ID = array_action_ids(i)
dropDownList.Visible = True
dropDownList.DataSourceID = "SqlDataSource2"
dropDownList.DataTextField = "LEGAL_PHONE_NUMBER"
dropDownList.DataValueField = "LEGAL_PHONE_ID"
Fields.Controls.Add(GetLiteral("<td>"))
Fields.Controls.Add(dropDownList)
Fields.Controls.Add(GetLiteral("</td>"))
.....

I also have a submit button.
I want to get the selected value of the dropdownlist when the button is clicked.

I tried

Dim dropdownlist_phone As DropDownList = CType(Fields.FindControl("DropDownList_Phone"), DropDownList)

but it didn't work. I also tried

Dim temp_Placeholder as Placeholder = CType(UpdatePanel36.FindControl("Fields"), Placeholder)
Dim dropdownlist_phone As DropDownList = CType(temp_Placeholder.FindControl("DropDownList_Phone"), DropDownList)

but it didnt either work.
The controls of the Fields placeholder seems to be nothing in both approaches.

Could you please help me?

Thanks in advance,
Peny

[Prangadj]

Peny, you mistaken ms asp.net forums with telericks? No telerick controls in your code, ask other place.

[Peny]

Hello ,

I am sorry for the wrong post ...

I am new in asp.net and telerik programming, so I didnt exactly where to ask.
Is there a way to do this with telerik controls?

Regards,
Peny

[Prangadj]

If this does not work with MS controls, it won't work with telericks as your logic is not good. Make sure you create dropdowns on page init or page load and no later. May also read this asp.net tutorial:
http://www.aspnettutorials.com/tutorials/controls/control-dym-aspnet2-csharp.aspx

Prangadj

[Peny]

Hello Prangadj,

I really appreciate your help!!!

I cannot create the controls on page init because the controls creation depends on the value of an other dropdown list and i dont know from the beggining which controls should be created.

Peny