Retrieve data from Header template of Datalist

I have one checkbox control in Datalist Header and som开发者_StackOverflow中文版e controls in Item Template. On click of the "Submit" button in the page I should capture the state of controls from Datalist.

For Item template I can get the values from datalist.Items property.

How can I get the state of checkbox in "Header Template"?

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You can use this:

CheckBox ch = (CheckBox) DataListID.Controls
    .OfType<DataListItem> ()
    .First (a => a.ItemType == ListItemType.Header)
    .FindControl("<CheckBoxID>");