HtmlTextWriter.GetStyleKey(String) Méthode

Définition

Obtient la valeur d'énumération HtmlTextWriterStyle correspondant au style spécifié.Obtains the HtmlTextWriterStyle enumeration value for the specified style.

protected:
 System::Web::UI::HtmlTextWriterStyle GetStyleKey(System::String ^ styleName);
protected System.Web.UI.HtmlTextWriterStyle GetStyleKey (string styleName);
member this.GetStyleKey : string -> System.Web.UI.HtmlTextWriterStyle
Protected Function GetStyleKey (styleName As String) As HtmlTextWriterStyle

Paramètres

styleName
String

Attribut de style pour lequel obtenir HtmlTextWriterStyle.The style attribute for which to obtain the HtmlTextWriterStyle.

Retours

Valeur de l'énumération HtmlTextWriterStyle correspondant à styleName.The HtmlTextWriterStyle enumeration value corresponding to styleName.

Exemples

L’exemple de code suivant montre comment substituer la RenderBeginTag méthode dans une classe dérivée de HtmlTextWriter la classe.The following code example demonstrates how to override the RenderBeginTag method in a class derived from the HtmlTextWriter class. La RenderBeginTag substitution détermine si un <label> balisage sera rendu et, le cas échéant, vérifie l’élément pour un Color attribut.The RenderBeginTag override determines whether a <label> markup will be rendered, and, if so, checks the element for a Color attribute. Si un Color attribut n’a pas été défini, GetStyleKey la méthode est utilisée comme premier paramètre dans un appel à la AddStyleAttribute méthode pour ajouter un Color attribut à un <label> élément de balisage et Color affecter à l’attributlavaleurred.If a Color attribute has not been defined, the GetStyleKey method is used as the first parameter in a call to the AddStyleAttribute method to add a Color attribute to a <label> markup element and set the Color attribute to red.

// Override the RenderBeginTag method to check whether
// the tagKey parameter is set to a <label> element
// or a <font> element.   
virtual void RenderBeginTag( HtmlTextWriterTag tagKey ) override
{
   // If the tagKey parameter is set to a <label> element
   // but a color attribute is not defined on the element,
   // the AddStyleAttribute method adds a color attribute
   // and sets it to red.
   if ( tagKey == HtmlTextWriterTag::Label )
   {
      if (  !IsStyleAttributeDefined( HtmlTextWriterStyle::Color ) )
      {
         AddStyleAttribute( GetStyleKey( "color" ), "red" );
      }
   }

   // If the tagKey parameter is set to a <font> element
   // but a size attribute is not defined on the element,
   // the AddStyleAttribute method adds a size attribute
   // and sets it to 30 point.
   if ( tagKey == HtmlTextWriterTag::Font )
   {
      if (  !IsAttributeDefined( HtmlTextWriterAttribute::Size ) )
      {
         AddAttribute( GetAttributeKey( "size" ), "30pt" );
      }
   }

   // Call the base class's RenderBeginTag method
   // to ensure that calling this custom markup writer
   // includes functionality for all other elements.
   __super::RenderBeginTag( tagKey );
}
// Override the RenderBeginTag method to check whether
// the tagKey parameter is set to a <label> element
// or a <font> element.
public override void RenderBeginTag(HtmlTextWriterTag tagKey)
{

    // If the tagKey parameter is set to a <label> element
    // but a color attribute is not defined on the element,
    // the AddStyleAttribute method adds a color attribute
    // and sets it to red.
    if (tagKey == HtmlTextWriterTag.Label)
    {
        if (!IsStyleAttributeDefined(HtmlTextWriterStyle.Color))
        {
            AddStyleAttribute(GetStyleKey("color"), "red");
        }
    }
    // If the tagKey parameter is set to a <font> element
    // but a size attribute is not defined on the element,
    // the AddStyleAttribute method adds a size attribute
    // and sets it to 30 point. 
    if (tagKey == HtmlTextWriterTag.Font)
    {
        if (!IsAttributeDefined(HtmlTextWriterAttribute.Size))
        {
            AddAttribute(GetAttributeKey("size"), "30pt");
        }
    }
    // Call the base class's RenderBeginTag method
    // to ensure that this custom MarkupTextWriter
    // includes functionality for all other markup elements.
    base.RenderBeginTag(tagKey);
}
' Override the RenderBeginTag method to check whether
' the tagKey parameter is set to a <label> element
' or a <font> element.   
Public Overloads Overrides Sub RenderBeginTag(ByVal tagKey As HtmlTextWriterTag)
    ' If the tagKey parameter is set to a <label> element
    ' but a color attribute is not defined on the element,
    ' the AddStyleAttribute method adds a color attribute
    ' and sets it to red.
    If tagKey = HtmlTextWriterTag.Label Then
        If Not IsStyleAttributeDefined(HtmlTextWriterStyle.Color) Then
            AddStyleAttribute(GetStyleKey("color"), "red")
        End If
    End If

    ' If the tagKey parameter is set to a <font> element
    ' but a size attribute is not defined on the element,
    ' the AddStyleAttribute method adds a size attribute
    ' and sets it to 30 point. 
    If tagKey = HtmlTextWriterTag.Font Then
        If Not IsAttributeDefined(HtmlTextWriterAttribute.Size) Then
            AddAttribute(GetAttributeKey("size"), "30pt")
        End If
    End If

    ' Call the base class's RenderBeginTag method
    ' to ensure that this custom MarkupTextWriter
    ' includes functionality for all other markup elements.
    MyBase.RenderBeginTag(tagKey)
End Sub

Remarques

La GetStyleKey méthode retourne la valeur-1 tapée HtmlTextWriterStyle comme valeur, si styleName ne correspond à aucune HtmlTextWriterStyle valeur d’énumération.The GetStyleKey method returns the value -1 typed as a HtmlTextWriterStyle value, if styleName does not correspond to any HtmlTextWriterStyle enumeration value.

S’applique à

Voir aussi