Error : Object cannot be cast from DBNull to other types.

when there is null value in column we get following error
Object cannot be cast from DBNull to other types.

adding  following dbnull.value?false will resolve error in you f=gridview

Checked='<%#Eval("Approved")==DBNull.Value?false: Convert.ToBoolean(Eval("Approved")) %>'



<ItemTemplate>
<asp:CheckBox ID="chkStatus" runat="server"  Checked='<%# Eval("Approved") == DBNull.Value ? false : Convert.ToBoolean(Eval("Approved")) %>'
Text='<%# Eval("Approved").ToString().Equals("0") ? " Approved " : " Pending " %>' />            

</ItemTemplate>     

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