HttpCapabilitiesBase.RequiresUniqueFilePathSuffix Property

Reference

Definition

Namespace:: System.Web.Configuration

Assembly:: System.Web.dll

Important

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Gets a value indicating whether the browser requires unique form-action URLs.

public:
 virtual property bool RequiresUniqueFilePathSuffix { bool get(); };

public virtual bool RequiresUniqueFilePathSuffix { get; }

member this.RequiresUniqueFilePathSuffix : bool

Public Overridable ReadOnly Property RequiresUniqueFilePathSuffix As Boolean

Property Value

Boolean

true if the browser requires unique form-action URLs; otherwise, false. The default is false.

Examples

The following code example shows how to determine whether the browser requires unique form-action URLs.

<%@ 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).RequiresUniqueFilePathSuffix)
        {
            labelText = "Browser requires FORM ACTION URLs be unique.";
        }
        else
        {
            labelText = "Browser does not require FORM ACTION URLs be unique.";
        }

        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)).RequiresUniqueFilePathSuffix Then
            labelText = "Browser requires FORM ACTION URLs be unique."
        Else
            labelText = "Browser does not require FORM ACTION URLs be unique."
        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>

Remarks

A self-referring HTML <form> element is one for which the action attribute specifies its own URL. If true, self-referring forms do not return the correct results. This is due to caching by either the browser or an intermediate gateway. To correct this, server control adapters append a default query string (__ufps=``uniquefilepathsuffix) onto the form-action URL values of self-referring forms.

Applies to

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