HtmlTextWriter.AddAttribute Method (String, String, Boolean)
Assembly: System.Web (in System.Web.dll)
For an instance of any given markup element, the HtmlTextWriter class maintains a list of attributes for that element. When the RenderBeginTag method is called, any attributes added by the AddAttribute method are rendered to the opening tag of the element. The list of attributes is then cleared from the HtmlTextWriter object.
Use the method with fEncode set to true, if the attribute can possibly contain a quotation mark ("), a less than sign (<), or an ampersand (&). The method call will encode the attribute to meet the requirements of the requesting device. You can set fEncode to false, if you know that none of these characters will be generated, or if you know that the attribute is already encoded.
The coding pattern for rendering markup elements is as follows:
The following code example shows how to use the AddAttribute overload of the method to ensure that a custom attribute, named myattribute, and its value are not encoded for an <img> element.
// Control the encoding of attributes. // Simple known values do not need encoding. writer.AddAttribute(HtmlTextWriterAttribute.Alt, "Encoding, \"Required\"", true); writer.AddAttribute("myattribute", "No "encoding " required", false); writer.RenderBeginTag(HtmlTextWriterTag.Img); writer.RenderEndTag(); writer.WriteLine();
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.