Am avut nevoie să validez din asp .net dacă un checkbox este marcat sau nu. Am găsit următoarea soluţie:
<%@ Page language="c#" Codebehind="ValidateCheckbox.aspx.cs" AutoEventWireup="false" Inherits="WebApplication1.ValidateCheckbox" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <HTML> <HEAD> <script language="javascript"> function ValidateChecked(oSrc, args){ if(document.all["<%=chk.ClientID%>"].checked == false){ alert("Has to be checked."); args.IsValid = false; } } </script> </HEAD> <body> <form id="Form1" method="post" runat="server"> <asp:CustomValidator ClientValidationFunction="ValidateChecked" Runat="server" ID="val"/> <asp:CheckBox ID="chk" Runat="server" /> <asp:Button ID="btn" Runat="server" Text="Submit" /> </form> </body> </HTML>
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