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Listing 3.11 - ShowFixedValue.aspx

Illustrates how to use the ASP.NET CompareValidator validation control to compare the value of a form field against a fixed value.

Listing 3.11 - ShowFixedValue.aspx (C#)
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<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    void Page_Load()
    {
        cmpDate.ValueToCompare = DateTime.Now.ToString("d");
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Show Fixed Value</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <asp:Label
        id="lblDate"
        Text="Date:"
        AssociatedControlID="txtDate"
        Runat="server" />
    <asp:TextBox
        id="txtDate"
        Runat="server" />
    <asp:CompareValidator
        id="cmpDate"
        Text="(Date must be greater than now)"
        ControlToValidate="txtDate"
        Type="Date"
        Operator="GreaterThan"
        Runat="server" />    
    
    <br /><br />
    
    <asp:Button
        id="btnSubmit"
        Text="Submit"
        Runat="server" />
    
    </div>
    </form>
</body>
</html>