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Hide ASP.NET Web Forms GridView BoundField Column With Value Accessible Through JavaScript

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To hide a BoundField column but make it's value still accessible through JavaScript just set column's ItemStyle-CssClass and HeaderStyle-CssClass properties using CSS class with value display:none.
CSS 
.hiddenColumn{
 display:none;
}
ASPX 
<asp:BoundField DataField="GroupCode" HeaderText="Group Code" ItemStyle-CssClass="hiddenColumn" HeaderStyle-CssClass="hiddenColumn"/>

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