Find CheckBox Inside a repeater in another button click event

Question

I have two nested repeater and a check box inside that, like this

<asp:Repeater ID="rptInterestCategory" runat="server" OnItemDataBound="rptInterestCategory_ItemDataBound">
        <ItemTemplate>
            <asp:Repeater ID="rptInterests" runat="server" OnItemDataBound="rptInterests_ItemDataBound">
                <ItemTemplate>
                    <asp:CheckBox ID="cbInterest" runat="server" OnCheckedChanged="cbInterest_CheckedChanged" Data-Id='<%# DataBinder.Eval(Container.DataItem, "id") %>' Text='<%# DataBinder.Eval(Container.DataItem, "name") %>' />

                </ItemTemplate>
            </asp:Repeater>
            <hr/>
        </ItemTemplate>
    </asp:Repeater>

Now on another button click event I want to find which all checkboxes(cbInterest )are checked and need to get the value inside it. What will be the correct approach to do this?

Answer 1

The way you would loop through them is to first get a reference to the nested Repeater:

Repeater rptInterests = (Repeater)rptInterestCategory.FindControl("rptInterests");

And then you can loop through the data items, find the checkbox, and get the value of the CheckBox:

foreach (RepeaterItem item in rptInterests.Items)
{
    CheckBox cbInterest = (CheckBox)item.FindControl("cbInterest");
    bool isChecked = cbInterest.Checked;
}