How can I loop through Items in the Item Template from an asp:Repeater?

Question

I have a repeater, which is bound on preRender with items. In the Item template each row has a check box. This works fine.

I'm trying to loop through all the checkboxes in the item template after it has been bound. Is there any way of doing this?

Answer 1

It sounds to me like you want to use the ItemDataBound event.

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.repeater.itemdatabound.aspx

You will want to check the ItemType of the RepeaterItem so that you don't attempt to find the checkbox in Header/Footer/Seperator/Pager/Edit

Your event would look something along the lines of:

void rptItems_ItemDataBound(object sender, RepeaterItemEventArgs e) {     if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)     {         var checkBox = (CheckBox) e.Item.FindControl("ckbActive");          //Do something with your checkbox...         checkBox.Checked = true;     } } 

This event can be raised by adding the event in your code behind like so:

rptItems.ItemDataBound += new RepeaterItemEventHandler(rptItems_ItemDataBound); 

Or by adding it to the control on the client:

onitemdatabound="rptItems_ItemDataBound" 

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Alternatively you can do as the others suggested and iterate over the RepeaterItems, however you still need to check the itemtype.

foreach (RepeaterItem item in rptItems.Items) {     if (item.ItemType == ListItemType.Item || item.ItemType == ListItemType.AlternatingItem)     {         var checkBox = (CheckBox)item.FindControl("ckbActive");          //Do something with your checkbox...         checkBox.Checked = true;     } } 

You would want to do that in the Page PreRender, after the Repeater has been bound.