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HttpCapabilitiesBase.SupportsUncheck Property

Gets a value indicating whether the clearing of a checked HTML <input type=checkbox> element is reflected in postback data.

Namespace: System.Web.Configuration
Assembly: System.Web (in system.web.dll)

public virtual bool SupportsUncheck { get; }
/** @property */
public boolean get_SupportsUncheck ()

public function get SupportsUncheck () : boolean

Not applicable.

Property Value

true if the clearing of a checked HTML <input type=checkbox> element is reflected in postback data; otherwise, false. The default is true.

If false, the value of the checked attribute of HTML <input type=checkbox> elements is omitted from postback data.

The following code example shows how to determine whether the clearing of a checked HTML <input type=checkbox> element is reflected in postback data.

<%@ 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(Object Sender, EventArgs e)
    {
        CheckBrowserCaps();
    }

    void CheckBrowserCaps()
    {
        String labelText = "";
        System.Web.HttpBrowserCapabilities myBrowserCaps = Request.Browser;
        if (((System.Web.Configuration.HttpCapabilitiesBase)myBrowserCaps).SupportsUncheck)
        {
            labelText = "Browser reflects the unchecking of a checked HTML CHECKBOX element in postback data.";
        }
        else
        {
            labelText = "Browser does not reflect the unchecking of a checked HTML CHECKBOX element in postback data.";
        }

        Label1.Text = labelText;
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Browser Capabilities Sample</title>
</head>
<body>
    <form runat="server" id="form1">
        <div>
            Browser Capabilities:
            <p/><asp:Label ID="Label1" Runat="server" />
        </div>
    </form>
</body>
</html>

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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