HttpCapabilitiesBase.SupportsCallback HttpCapabilitiesBase.SupportsCallback HttpCapabilitiesBase.SupportsCallback HttpCapabilitiesBase.SupportsCallback Property

Definición

Obtiene un valor que indica si el explorador admite scripts de devolución de llamada.Gets a value indicating whether the browser supports callback scripts.

public:
 virtual property bool SupportsCallback { bool get(); };
public virtual bool SupportsCallback { get; }
member this.SupportsCallback : bool
Public Overridable ReadOnly Property SupportsCallback As Boolean

Valor de propiedad

Es true si el explorador admite scripts de devolución de llamada; en caso contrario, es false.true if the browser supports callback scripts; otherwise, false. De manera predeterminada, es false.The default is false.

Ejemplos

En el ejemplo de código siguiente se muestra cómo determinar si el explorador admite scripts de devolución de llamada.The following code example shows how to determine whether the browser supports callback scripts.

<%@ 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).SupportsCallback)
        {
            labelText = "Browser supports callback scripts.";
        }
        else
        {
            labelText = "Browser does not support callback scripts.";
        }

        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>
<%@ page language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        CheckBrowserCaps()
    End Sub

    Function CheckBrowserCaps()

        Dim labelText As String = ""
        Dim myBrowserCaps As System.Web.HttpBrowserCapabilities = Request.Browser
        If (CType(myBrowserCaps, System.Web.Configuration.HttpCapabilitiesBase)).SupportsCallback Then
            labelText = "Browser supports callback scripts."
        Else
            labelText = "Browser does not support callback scripts."
        End If

        Label1.Text = labelText

    End Function 'CheckBrowserCaps
</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>

Se aplica a