Html32TextWriter Constructores
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Inicializa una nueva instancia de la clase Html32TextWriter.
Sobrecargas
| Html32TextWriter(TextWriter) |
Inicializa una nueva instancia de la clase Html32TextWriter que utiliza la sangría de línea especificada en el campo DefaultTabString cuando el explorador que realizó la solicitud requiere sangría de línea. |
| Html32TextWriter(TextWriter, String) |
Inicializa una nueva instancia de la clase Html32TextWriter que utiliza la sangría de línea especificada. |
Html32TextWriter(TextWriter)
Inicializa una nueva instancia de la clase Html32TextWriter que utiliza la sangría de línea especificada en el campo DefaultTabString cuando el explorador que realizó la solicitud requiere sangría de línea.
public:
Html32TextWriter(System::IO::TextWriter ^ writer);public Html32TextWriter (System.IO.TextWriter writer);new System.Web.UI.Html32TextWriter : System.IO.TextWriter -> System.Web.UI.Html32TextWriterPublic Sub New (writer As TextWriter)Parámetros
- writer
- TextWriter
Objeto TextWriter que representa el contenido HTML.
Ejemplos
En el ejemplo de código siguiente se muestra cómo usar una clase personalizada que deriva de la Html32TextWriter clase . Tiene dos constructores, que es estándar para todas las clases que se derivan directa o indirectamente de la HtmlTextWriter clase .
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();
}
}
}
' Create a custom HtmlTextWriter class that overrides
' the RenderBeforeContent and RenderAfterContent methods.
Imports System.IO
Imports System.Web.UI
Namespace Examples.AspNet
Public Class CustomHtml32TextWriter
Inherits Html32TextWriter
' Create a constructor for the class
' that takes a TextWriter as a parameter.
Public Sub New(ByVal writer As TextWriter)
Me.New(writer, DefaultTabString)
End Sub
' Create a constructor for the class that takes
' a TextWriter and a string as parameters.
Public Sub New(ByVal writer As TextWriter, ByVal tabString As String)
MyBase.New(writer, tabString)
End Sub
' Override the RenderBeforeContent method to render
' styles before rendering the content of a <th> element.
Protected Overrides Function RenderBeforeContent() As String
' 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 Then
If (SupportsBold) Then
Return "<b>"
Else
Return "<font color=""FF0000"">"
End If
End If
' 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 Then
If (SupportsItalic) Then
Return "<i>"
Else
Return "<font color=""000080"">"
End If
End If
' Call the base method.
Return MyBase.RenderBeforeContent()
End Function
' Override the RenderAfterContent method to close
' styles opened during the call to the RenderBeforeContent
' method.
Protected Overrides Function RenderAfterContent() As String
' 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 Then
If SupportsBold Then
Return "</b>"
Else
Return "</font>"
End If
End If
' 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 Then
If (SupportsItalic) Then
Return "</i>"
Else
Return "</font>"
End If
End If
' Call the base method.
Return MyBase.RenderAfterContent()
End Function
' 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 Overrides Function RenderBeforeTag() As String
' 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 Then
Return "<small>"
End If
Return MyBase.RenderBeforeTag()
End Function
' Override the RenderAfterTag method to render
' close any elements opened in the RenderBeforeTag
' method call.
Protected Overrides Function RenderAfterTag() As String
' 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 Then
Return "</small>"
End If
Return MyBase.RenderAfterTag()
End Function
End Class
End Namespace
Comentarios
El Html32TextWriter constructor pasa el valor de DefaultTabString campo a una segunda versión que tiene los dos parámetros siguientes:
writer, que toma una instancia de la TextWriter clase .tabString, que toma una cadena que define la sangría de línea.
Se aplica a
Html32TextWriter(TextWriter, String)
Inicializa una nueva instancia de la clase Html32TextWriter que utiliza la sangría de línea especificada.
public:
Html32TextWriter(System::IO::TextWriter ^ writer, System::String ^ tabString);public Html32TextWriter (System.IO.TextWriter writer, string tabString);new System.Web.UI.Html32TextWriter : System.IO.TextWriter * string -> System.Web.UI.Html32TextWriterPublic Sub New (writer As TextWriter, tabString As String)Parámetros
- writer
- TextWriter
El objeto TextWriter que representa el contenido HMTL 3.2.
Ejemplos
En el ejemplo de código siguiente se muestra cómo usar una clase personalizada que deriva de la Html32TextWriter clase . Tiene dos constructores, que es estándar para todas las clases que se derivan directa o indirectamente de la HtmlTextWriter clase .
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();
}
}
}
' Create a custom HtmlTextWriter class that overrides
' the RenderBeforeContent and RenderAfterContent methods.
Imports System.IO
Imports System.Web.UI
Namespace Examples.AspNet
Public Class CustomHtml32TextWriter
Inherits Html32TextWriter
' Create a constructor for the class
' that takes a TextWriter as a parameter.
Public Sub New(ByVal writer As TextWriter)
Me.New(writer, DefaultTabString)
End Sub
' Create a constructor for the class that takes
' a TextWriter and a string as parameters.
Public Sub New(ByVal writer As TextWriter, ByVal tabString As String)
MyBase.New(writer, tabString)
End Sub
' Override the RenderBeforeContent method to render
' styles before rendering the content of a <th> element.
Protected Overrides Function RenderBeforeContent() As String
' 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 Then
If (SupportsBold) Then
Return "<b>"
Else
Return "<font color=""FF0000"">"
End If
End If
' 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 Then
If (SupportsItalic) Then
Return "<i>"
Else
Return "<font color=""000080"">"
End If
End If
' Call the base method.
Return MyBase.RenderBeforeContent()
End Function
' Override the RenderAfterContent method to close
' styles opened during the call to the RenderBeforeContent
' method.
Protected Overrides Function RenderAfterContent() As String
' 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 Then
If SupportsBold Then
Return "</b>"
Else
Return "</font>"
End If
End If
' 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 Then
If (SupportsItalic) Then
Return "</i>"
Else
Return "</font>"
End If
End If
' Call the base method.
Return MyBase.RenderAfterContent()
End Function
' 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 Overrides Function RenderBeforeTag() As String
' 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 Then
Return "<small>"
End If
Return MyBase.RenderBeforeTag()
End Function
' Override the RenderAfterTag method to render
' close any elements opened in the RenderBeforeTag
' method call.
Protected Overrides Function RenderAfterTag() As String
' 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 Then
Return "</small>"
End If
Return MyBase.RenderAfterTag()
End Function
End Class
End Namespace
Consulte también
Se aplica a
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