HttpServerUtility Class (System.Web)

HttpServerUtility Class

.NET Framework Class Library

HttpServerUtility Class

Provides helper methods for processing Web requests.

Namespace: System.Web
Assembly: System.Web (in System.Web.dll)

Syntax

Visual Basic (Declaration)

<AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level := AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class HttpServerUtility

Visual Basic (Usage)

Dim instance As HttpServerUtility

[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class HttpServerUtility

Visual C++

[AspNetHostingPermissionAttribute(SecurityAction::LinkDemand, Level = AspNetHostingPermissionLevel::Minimal)]
public ref class HttpServerUtility sealed

JScript

public final class HttpServerUtility

Remarks

The methods and properties of the HttpServerUtility class are exposed through the intrinsic Server object provided by ASP.NET.

Examples

The following example demonstrates how to use the HtmlEncode method and the UrlEncode method of the HttpServerUtility class. The HtmlEncode method helps ensure that any user-supplied string input will be rendered as static text in browsers instead of executable script or HTML elements. The UrlEncode method encodes URLs so that they are correctly transmitted in the HTTP stream.

Visual Basic

<%@ 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">

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)

        If (Not String.IsNullOrEmpty(TextBox1.Text)) Then

            ' Access the HttpServerUtility methods through
            ' the intrinsic Server object.
            Label1.Text = "Welcome, " & _
                Server.HtmlEncode(TextBox1.Text) & _
                ".<br/> The url is " & _
                Server.UrlEncode(Request.Url.ToString())
        End If



    End Sub
</script>

<html  >
<head id="Head1" runat="server">
    <title>HttpServerUtility Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        Enter your name:<br />

        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Submit" />
        <br />
        <asp:Label ID="Label1" runat="server"/>
        </div>
    </form>
</body>
</html>

<%@ 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">

    protected void Button1_Click(object sender, EventArgs e)
    {
        if (!String.IsNullOrEmpty(TextBox1.Text))
        {
            // Access the HttpServerUtility methods through
            // the intrinsic Server object.
            Label1.Text = "Welcome, " +
                Server.HtmlEncode(TextBox1.Text) +
                ".<br/> The url is " + 
                Server.UrlEncode(Request.Url.ToString());
        }
    }

</script>

<html  >
<head runat="server">
    <title>HttpServerUtility Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        Enter your name:<br />

        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Submit" />
        <br />
        <asp:Label ID="Label1" runat="server"/>
        </div>
    </form>
</body>
</html>

.NET Framework Security

AspNetHostingPermission
for operating in a hosted environment. Demand value: LinkDemand. Permission value: Minimal

Inheritance Hierarchy

System..::.Object
System.Web..::.HttpServerUtility

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

Reference

HttpServerUtility Members

System.Web Namespace

HttpContext