HtmlDocument.CreateElement(String) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Creates a new HtmlElement
of the specified HTML tag type.
public:
System::Windows::Forms::HtmlElement ^ CreateElement(System::String ^ elementTag);
public System.Windows.Forms.HtmlElement CreateElement (string elementTag);
public System.Windows.Forms.HtmlElement? CreateElement (string elementTag);
member this.CreateElement : string -> System.Windows.Forms.HtmlElement
Public Function CreateElement (elementTag As String) As HtmlElement
Parameters
- elementTag
- String
The name of the HTML element to create.
Returns
A new element of the specified tag type.
Examples
The following code example uses data from the Northwind database to create an HTML table using CreateElement. The AppendChild method is also used, first to add cells (TD
elements) to rows (TR
elements), then to add rows to the table, and finally to append the table to the end of the current document. The code example requires that your application has a WebBrowser control called WebBrowser1
.
private void DisplayCustomersTable()
{
DataSet customersSet = new DataSet();
DataTable customersTable = null;
SqlDataAdapter sda = new SqlDataAdapter("SELECT * FROM Customers", "Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind;");
sda.Fill(customersTable);
customersTable = customersSet.Tables[0];
if (webBrowser1.Document != null)
{
HtmlElement tableRow = null;
HtmlElement headerElem = null;
HtmlDocument doc = webBrowser1.Document;
HtmlElement tableElem = doc.CreateElement("TABLE");
doc.Body.AppendChild(tableElem);
HtmlElement tableHeader = doc.CreateElement("THEAD");
tableElem.AppendChild(tableHeader);
tableRow = doc.CreateElement("TR");
tableHeader.AppendChild(tableRow);
foreach (DataColumn col in customersTable.Columns)
{
headerElem = doc.CreateElement("TH");
headerElem.InnerText = col.ColumnName;
tableRow.AppendChild(headerElem);
}
// Create table rows.
HtmlElement tableBody = doc.CreateElement("TBODY");
tableElem.AppendChild(tableBody);
foreach (DataRow dr in customersTable.Rows)
{
tableRow = doc.CreateElement("TR");
tableBody.AppendChild(tableRow);
foreach (DataColumn col in customersTable.Columns)
{
Object dbCell = dr[col];
HtmlElement tableCell = doc.CreateElement("TD");
if (!(dbCell is DBNull))
{
tableCell.InnerText = dbCell.ToString();
}
tableRow.AppendChild(tableCell);
}
}
}
}
Private Sub DisplayCustomersTable()
' Initialize the database connection.
Dim CustomerData As New DataSet()
Dim CustomerTable As DataTable
Try
Dim DBConn As New SqlConnection("Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind;")
Dim DBQuery As New SqlDataAdapter("SELECT * FROM CUSTOMERS", DBConn)
DBQuery.Fill(CustomerData)
Catch dbEX As DataException
End Try
CustomerTable = CustomerData.Tables("Customers")
If (Not (WebBrowser1.Document Is Nothing)) Then
With WebBrowser1.Document
Dim TableElem As HtmlElement = .CreateElement("TABLE")
.Body.AppendChild(TableElem)
Dim TableRow As HtmlElement
' Create the table header.
Dim TableHeader As HtmlElement = .CreateElement("THEAD")
TableElem.AppendChild(TableHeader)
TableRow = .CreateElement("TR")
TableHeader.AppendChild(TableRow)
Dim HeaderElem As HtmlElement
For Each Col As DataColumn In CustomerTable.Columns
HeaderElem = .CreateElement("TH")
HeaderElem.InnerText = Col.ColumnName
TableRow.AppendChild(HeaderElem)
Next
' Create table rows.
Dim TableBody As HtmlElement = .CreateElement("TBODY")
TableElem.AppendChild(TableBody)
For Each Row As DataRow In CustomerTable.Rows
TableRow = .CreateElement("TR")
TableBody.AppendChild(TableRow)
For Each Col As DataColumn In CustomerTable.Columns
Dim Item As Object = Row(Col)
Dim TableCell As HtmlElement = .CreateElement("TD")
If Not (TypeOf (Item) Is DBNull) Then
TableCell.InnerText = CStr(Item)
End If
TableRow.AppendChild(TableCell)
Next
Next
End With
End If
End Sub
Remarks
elementTag
may be any of the supported HTML tags in Internet Explorer except for FRAME
and IFRAME
.
CreateElement returns an element unattached to the current document tree. To add the element to the document, use either the InsertAdjacentElement or AppendChild methods.
This method will not affect the state of an existing document's source code when you use the WebBrowser control's View Source context menu command or the DocumentText and DocumentStream properties of the WebBrowser control.
When you create new elements with CreateElement, you will not be able to set certain properties, such as Name
. In cases where you need to set the Name attribute, assign them as HTML to the InnerHtml property of another object in the document.
Applies to
See also
משוב
https://aka.ms/ContentUserFeedback.
בקרוב: במהלך 2024, נפתור בעיות GitHub כמנגנון המשוב לתוכן ונחליף אותו במערכת משוב חדשה. לקבלת מידע נוסף, ראה:שלח והצג משוב עבור