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asp.netcontrolsvisibledatabound

Negate field value to set control visiblity

I have a control with the visible property set to the value of a boolean field. However, I want the visiblity to be the opposite of the boolean field. How do I do this?

This code shows the visible property set to the value of the field. I want to negate that value.

<span runat="server" id="toMonthYear" visible='<%#Eval("isAttending")%>'>
     <%#Eval("toMonthName")%> 
</span>
Solution

  • Simply cast it to bool and use the negation operator (NOT in VB.NET).

    Visible='<%# !(bool)Eval("isAttending") %>'