Question

I am annoyed with a problem I have repeater control in updatepanel like this.

<asp:UpdatePanel ID="UpdPnlConstituentRepeater" ChildrenAsTriggers="true"    runat="server">

                            <ContentTemplate>
                                <asp:Repeater ID="repConstituentInformation" runat="server" OnItemDataBound="repConstituentInformation_ItemDataBound">
 <ItemTemplate>
 <asp:DropDownList ID="dropRegistrantDownCostType" runat="server" AppendDataBoundItems="true"
                                                        AutoPostBack="true" OnSelectedIndexChanged="dropRegistrantDownCostType_SelectedIndexChanged"
                                                        EnableViewState="true">
                                                        <asp:ListItem Text="Select Type" Value="0" Selected="True" />
                                                    </asp:DropDownList>

 <asp:CheckBoxList ID="chkBoxListRegistrantBenefits" AutoPostBack="true" runat="server"
                                                        OnSelectedIndexChanged="chkBoxListRegistrantBenefits_SelectedIndexChanged">
                                                    </asp:CheckBoxList>
</itemTemplate>
</ContentTemplate>
</asp:UpdatePanel>

The problem I face that whenever I select any value from dropdown all the page gets refreshed After spending hours on the google I found a solution i.e, on itemdatabound event of repeater we just need to add the following code after finding the dropdown,

Dim sm As ScriptManager = ScriptManager.GetCurrent(Page)
            sm.RegisterAsyncPostBackControl(objDropdownlist) 

It worked very well for the dropdown but same is not working for checkboxlist like using the scripmanager instance if I write sm.RegisterAsyncPostBackControl(chkBoxListRegistrantBenefits), it is not working 🙁

Answer 1

Add ClientIDMode="AutoID" to the Repeater control.

You should not have to add any triggers and you should not even have to call RegisterAsyncPostBackControl. The ChildrenAsTriggers should take care of that.