Html32TextWriter Constructor (TextWriter)
Initializes a new instance of the Html32TextWriter class that uses the line indentation that is specified in the HtmlTextWriter.DefaultTabString field when the requesting browser requires line indentation.
Assembly: System.Web (in System.Web.dll)
Parameters
- writer
-
Type:
System.IO.TextWriter
The TextWriter that renders the HMTL content.
The Html32TextWriter constructor passes the DefaultTabString field value to a second version that has the following two parameters:
writer, which takes an instance of the TextWriter class.
tabString, which takes a string that defines line indentation.
The following code example demonstrates how to use a custom class that derives from the Html32TextWriter class. It has two constructors, which is standard for all classes that derive directly or indirectly from the HtmlTextWriter class.
using System.IO; using System.Web.UI; namespace Examples.AspNet { public class CustomHtml32TextWriter : Html32TextWriter { // Create a constructor for the class // that takes a TextWriter as a parameter. public CustomHtml32TextWriter(TextWriter writer) : this(writer, DefaultTabString) { } // Create a constructor for the class that takes // a TextWriter and a string as parameters. public CustomHtml32TextWriter(TextWriter writer, String tabString) : base(writer, tabString) { } // Override the RenderBeforeContent method to render // styles before rendering the content of a <th> element. protected override string RenderBeforeContent() { // Check the TagKey property. If its value is // HtmlTextWriterTag.TH, check the value of the // SupportsBold property. If true, return the // opening tag of a <b> element; otherwise, render // the opening tag of a <font> element with a color // attribute set to the hexadecimal value for red. if (TagKey == HtmlTextWriterTag.Th) { if (SupportsBold) return "<b>"; else return "<font color=\"FF0000\">"; } // Check whether the element being rendered // is an <H4> element. If it is, check the // value of the SupportsItalic property. // If true, render the opening tag of the <i> element // prior to the <H4> element's content; otherwise, // render the opening tag of a <font> element // with a color attribute set to the hexadecimal // value for navy blue. if (TagKey == HtmlTextWriterTag.H4) { if (SupportsItalic) return "<i>"; else return "<font color=\"000080\">"; } // Call the base method. return base.RenderBeforeContent(); } // Override the RenderAfterContent method to close // styles opened during the call to the RenderBeforeContent // method. protected override string RenderAfterContent() { // Check whether the element being rendered is a <th> element. // If so, and the requesting device supports bold formatting, // render the closing tag of the <b> element. If not, // render the closing tag of the <font> element. if (TagKey == HtmlTextWriterTag.Th) { if (SupportsBold) return "</b>"; else return "</font>"; } // Check whether the element being rendered is an <H4>. // element. If so, and the requesting device supports italic // formatting, render the closing tag of the <i> element. // If not, render the closing tag of the <font> element. if (TagKey == HtmlTextWriterTag.H4) { if (SupportsItalic) return "</i>"; else return "</font>"; } // Call the base method return base.RenderAfterContent(); } // Override the RenderBeforeTag method to render the // opening tag of a <small> element to modify the text size of // any <a> elements that this writer encounters. protected override string RenderBeforeTag() { // Check whether the element being rendered is an // <a> element. If so, render the opening tag // of the <small> element; otherwise, call the base method. if (TagKey == HtmlTextWriterTag.A) return "<small>"; return base.RenderBeforeTag(); } // Override the RenderAfterTag method to render // close any elements opened in the RenderBeforeTag // method call. protected override string RenderAfterTag() { // Check whether the element being rendered is an // <a> element. If so, render the closing tag of the // <small> element; otherwise, call the base method. if (TagKey == HtmlTextWriterTag.A) return "</small>"; return base.RenderAfterTag(); } } }
Available since 1.1