Nested Repeater - ItemCommand only fires if attached via markup

Question

I have a repeater nested in the ItemTemplate of a parent Repeater. I usually connect them to controls declaratively in markup.

<asp:Repeater runat='server' id='myParentRepeater'>
    <ItemTemplate>
        <asp:Repeater runat='server' id='mynestedRepeater' OnItemCommand='myMethod'>
           ...
        </asp:Repeater>
        ...
    </ItemTemplate>
</asp>

Today I decided to do it in the code-behind, specifically in the ItemDataBound method of the parent repeater./

((Repeater)e.item.FindControl("MyParentRepeater")).ItemCommand += ...

But it won't work this way. Unless I use markup the event handler won't fire. Why is this? Or, assuming it should work, can someone tell me what have I done wrong?

score 3 · Accepted Answer · answered Dec 10 '12 at 15:45

3

The ItemDataBound event is triggered only when the Repeater is databound and not on every postback. But events must be recreated on every postback. Hence use the ItemCreated event instead.

protected void myParentRepeater_ItemCreated(Object Sender, RepeaterItemEventArgs e) {
      if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) {
          ((Repeater)e.item.FindControl("MyParentRepeater")).ItemCommand += ...
      }
}

answered Dec 10 '12 at 15:45

Tim Schmelter

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Does `ItemCreated` fire on every postback? Regardless of whether the control is rebound or not? I always assumed the wiring was done with javascript which would persist across postback ... – immutabl Dec 10 '12 at 15:52
1

@5arx: Yes, `ItemCreated` is the event which is fired when the item (or row in case of a `GridView` and it's `RowCreated`-event) was (re)created. So that's where the controls are actually created. – Tim Schmelter Dec 10 '12 at 15:53

Payman Abbasian · Answer 2 · 2012-12-12T12:23:26.520

1

ADD

 OnItemCommand="repNested_ItemCommand"

to

<asp:Repeater ID="rptNested" runat="server" OnItemCommand="repSales_ItemCommand">

CodeBehind:

Protected Sub repNested_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.RepeaterCommandEventArgs)


 Select Case e.CommandName
// Do whatever you want

edited Dec 12 '12 at 12:23

answered Dec 11 '12 at 15:17

Payman Abbasian

11
2

Nested Repeater - ItemCommand only fires if attached via markup

2 Answers2