Html32TextWriter.SupportsBold 屬性

定義

命名空間:

System.Web.UI

組件:

System.Web.dll

取得或設定布林值，指出提出要求的裝置是否支援粗體 HTML 文字。 請使用 SupportsBold 屬性，條件式地呈現粗體文字至 Html32TextWriter 輸出資料流。

public:
 property bool SupportsBold { bool get(); void set(bool value); };

public bool SupportsBold { get; set; }

member this.SupportsBold : bool with get, set

Public Property SupportsBold As Boolean

屬性值

Boolean

如果提出要求的裝置支援粗體文字，則為 true，否則為 false。 預設為 true。

範例

下列程式碼範例示範如何覆寫 RenderBeforeContent 和 RenderAfterContent 方法。 每個覆寫都會檢查項目是否 Label 正在轉譯，然後使用 SupportsBold 方法來檢查要求裝置是否可以顯示粗體格式設定。 如果裝置支援粗體格式設定， RenderBeforeContent 方法會寫入專案的開頭標記 b ，而 RenderAfterContent 方法會寫入其結束記號。 如果裝置不支援粗體格式設定， RenderBeforeContent 方法會寫入元素的 Font 開頭標記，並將 color 屬性設定為紅色的十六進位值，而 RenderAfterContent 方法會寫入結束記號。

此程式碼範例是提供給 類別之較大範例的 Html32TextWriter 一部分。

// 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 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

另請參閱

• RenderBeforeContent()
• RenderAfterContent()
• SupportsItalic