ASP.Net - Bind Null value to check box

I have check box bound to a bool - the value can be null.
The following code gives me a object not set to instance of an ....

   <asp:CheckBox ID="chkSendEmail" runat="server"  Checked='<%# Bind("SEND_EMAIL") %>'/>

How can I bind it?  If null I don't want the check box checked.

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Rajar AhmedConsultantCommented:

You have two option :
1.Either using iif
     <asp:CheckBox id="lblText" runat="server" Checked= '<%#IIF(Typeof(
Eval("send_email")) IS DbNull,false,Eval("send_email"))%>'></asp:CheckBox>

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2.Using function.
     <asp:CheckBox id="lblText" runat="server" Checked= '<%# CheckNull(Eval("send_email")) %>'></asp:CheckBox>

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 Protected Function CheckNull(ByVal objGrid As Object) As Boolean
        If Object.ReferenceEquals(objGrid, DBNull.Value) Then
            Return False
            Return objGrid.ToString()
        End If
    End Function

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For more reference using function :


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