HttpServerUtility.HtmlDecode Method
Important
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Decodes a string that has been encoded to eliminate invalid HTML characters.
To encode or decode values outside of a web application, use the WebUtility class.
| HtmlDecode(String) |
Decodes an HTML-encoded string and returns the decoded string. |
| HtmlDecode(String, TextWriter) |
Decodes an HTML-encoded string and sends the resulting output to a TextWriter output stream. |
Decodes an HTML-encoded string and returns the decoded string.
public:
System::String ^ HtmlDecode(System::String ^ s);public string HtmlDecode(string s);member this.HtmlDecode : string -> stringPublic Function HtmlDecode (s As String) As StringParameters
- s
- String
The HTML string to decode.
Returns
The decoded text.
Examples
The following example contains the function LoadDecodedFile, which decodes the data from a file and copies it into one string.
<%@ PAGE LANGUAGE = "C#" %>
<%@ IMPORT NAMESPACE = "System.IO" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<script runat ="server">
String LoadDecodedFile(String file)
{
String DecodedString = "";
FileStream fs = new FileStream(file, FileMode.Open);
StreamReader r = new StreamReader(fs);
// Position the file pointer at the beginning of the file.
r.BaseStream.Seek(0, SeekOrigin.Begin);
// Read the entire file into a string and decode each chunk.
while (r.Peek() > -1)
DecodedString += Server.HtmlDecode(r.ReadLine());
r.Close();
return DecodedString;
}
</script>
<head runat="server">
<title>HttpServerUtility.HtmlDecode Example</title>
</head>
<body></body>
</html>
<%@ PAGE LANGUAGE = "VB" %>
<%@ Import Namespace="System.IO" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<script runat = "server">
Function LoadDecodedFile(file As String) As String
Dim DecodedString As String
Dim fs As New FileStream(file, FileMode.Open)
Dim r As New StreamReader(fs)
' Position the file pointer at the beginning of the file.
r.BaseStream.Seek(0, SeekOrigin.Begin)
' Read the entire file into a string and decode each chunk.
Do While r.Peek() > -1
DecodedString = DecodedString & _
Server.HtmlDecode(r.ReadLine())
Loop
r.Close()
LoadDecodedFile = DecodedString
End Function
</script>
<head runat="server">
<title> HttpServerUtility.HtmlDecode Example</title>
</head>
<body></body>
</html>
Remarks
HTML encoding makes sure that text is displayed correctly in the browser and not interpreted by the browser as HTML. For example, if a text string contains a less than sign (<) or greater than sign (>), the browser would interpret these characters as the opening or closing bracket of an HTML tag. When the characters are HTML encoded, they are converted to the strings < and >, which causes the browser to display the less than sign and greater than sign correctly. HtmlDecode decodes text that has been transmitted to the server.
This method is a convenient way to access the HttpUtility.HtmlDecode method at run time from an ASP.NET application. Internally, this method uses HttpUtility.HtmlDecode to decode strings.
In the code-behind file for an ASP.NET web page, access an instance of the HttpServerUtility class through the Server property. In a class that is not in a code-behind file, use HttpContext.Current.Server to access an instance of the HttpServerUtility class.
Outside of a web application, use the WebUtility class to encode or decode values.
Applies to
.NET Framework 4.8.1 i druge verzije
| Proizvod | Verzije |
|---|---|
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Decodes an HTML-encoded string and sends the resulting output to a TextWriter output stream.
public:
void HtmlDecode(System::String ^ s, System::IO::TextWriter ^ output);public void HtmlDecode(string s, System.IO.TextWriter output);member this.HtmlDecode : string * System.IO.TextWriter -> unitPublic Sub HtmlDecode (s As String, output As TextWriter)Parameters
- s
- String
The HTML string to decode.
- output
- TextWriter
The TextWriter output stream that contains the decoded string.
Examples
The following example decodes a string that has been HTML-encoded for transmission over HTTP. It decodes the supplied string named EncodedString which contains the text "This is a <Test String>.", and copies it into the string named DecodedString as "This is a <Test String>.".
String EncodedString = "This is a <Test String>.";
StringWriter writer = new StringWriter();
Server.HtmlDecode(EncodedString, writer);
String DecodedString = writer.ToString();
Dim EncodedString As String = "This is a <Test String>."
Dim writer As New StringWriter
Server.HtmlDecode(EncodedString, writer)
Dim DecodedString As String = writer.ToString()
Remarks
HTML encoding makes sure that text is displayed correctly in the browser and not interpreted by the browser as HTML. For example, if a text string contains a less than sign (<) or greater than sign (>), the browser would interpret these characters as the opening or closing bracket of an HTML tag. When the characters are HTML encoded, they are converted to the strings < and >, which causes the browser to display the less than sign and greater than sign correctly.
HtmlDecode decodes text that has been transmitted to the server.
HtmlDecode is a convenient way to access the HttpUtility.HtmlDecode method at run time from an ASP.NET application. Internally, HtmlDecode uses HttpUtility.HtmlDecode to decode strings.
To encode or decode values outside of a web application, use the WebUtility class.
Applies to
.NET Framework 4.8.1 i druge verzije
| Proizvod | Verzije |
|---|---|
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
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