HtmlDocument.GetElementsByTagName(String) 方法

public:
 System::Windows::Forms::HtmlElementCollection ^ GetElementsByTagName(System::String ^ tagName);

public System.Windows.Forms.HtmlElementCollection GetElementsByTagName(string tagName);

member this.GetElementsByTagName : string -> System.Windows.Forms.HtmlElementCollection

Public Function GetElementsByTagName (tagName As String) As HtmlElementCollection

參數

傳回

標記名稱的元素集合等於該 tagName 參數。

範例

HTML 頁面常用標籤 META 來嵌入文件中的任意資訊。 以下 HTML 程式碼範例會擷取 HTML 文件中的所有 META 標籤，找到 META 名稱為 Description的標籤，並顯示給使用者。 程式碼範例要求你的應用程式有一個 WebBrowser 名為 WebBrowser1的控制項。

private void DisplayMetaDescription()
{
    if (webBrowser1.Document != null)
    {
        HtmlElementCollection elems = webBrowser1.Document.GetElementsByTagName("META");
        foreach (HtmlElement elem in elems)
        {
            String nameStr = elem.GetAttribute("name");
            if (nameStr != null && nameStr.Length != 0)
            {
                String contentStr = elem.GetAttribute("content");
                MessageBox.Show("Document: " + webBrowser1.Url.ToString() + "\nDescription: " + contentStr);
            }
        }
    }
}

Private Sub DisplayMetaDescription()
    If (WebBrowser1.Document IsNot Nothing) Then
        Dim Elems As HtmlElementCollection
        Dim WebOC As WebBrowser = WebBrowser1

        Elems = WebOC.Document.GetElementsByTagName("META")

        For Each elem As HtmlElement In Elems
            Dim NameStr As String = elem.GetAttribute("name")

            If ((NameStr IsNot Nothing) And (NameStr.Length <> 0)) Then
                If NameStr.ToLower().Equals("description") Then
                    Dim ContentStr As String = elem.GetAttribute("content")
                    MessageBox.Show("Document: " & WebOC.Url.ToString() & vbCrLf & "Description: " & ContentStr)
                End If
            End If
        Next
    End If
End Sub

另請參閱

• getElementsByTagName 方法