Forms Data Controls :: Get All Checkboxes From A Datalist?

Feb 21, 2011

In a datalist i've got a checkbox with a autopostback.

But there is an error if i run it:

System.InvalidCastException: Unable to cast object of type 'System.Web.UI.LiteralControl' to type 'System.Web.UI.WebControls.CheckBox'.

There are 40 checkboxes, if the person selects 1 i need to deselect all others. Very easy, but how to use correct coding for it?

protected void chkWerkblad_OnCheckedChanged(object source, EventArgs e)
{
CheckBox s = source as CheckBox;
if (s.Checked)
{
foreach (CheckBox c in s.NamingContainer.Controls)
{
if(c !=null)
c.Checked = true;
}
}
}

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  Design Page  

[code]....

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