HtmlBuilder.CreatingArea Event

Raised just before a new AREA tag is added to the image map.

Namespace: MindFusion.Diagramming
Package: MindFusion.Diagramming

 Syntax

C#

public event EventHandler<AreaEventArgs> CreatingArea

Visual Basic

Public Event CreatingArea As EventHandler(Of AreaEventArgs)

 Event Data

CreatingArea event handlers receive an argument of type AreaEventArgs. The following AreaEventArgs members provide information relevant to the event:

Member name	Description
AreaTag	The HTML AREA tag created by HtmlBuilder.
Item	The diagram element represented by AreaTag in the image map.
Column	Contains the index of a column if the event is raised for a table cell.
Row	Contains the index of a row if the event is raised for a table cell.

 Remarks

You could handle this event in order to insert additional attributes or JavaScript event handlers into the AREA tag. The tag string already ends with a closing ">" when the event is raised, so you must insert any additional attributes one character before the end of the tag string.

 Example

The following code adds a JavaScript onClick event handler to the area tag:

C#

private void htb_CreatingArea(object sender, AreaEventArgs e)
{
    string script = " onClick=\"alert('click click')\"";
    e.AreaTag = e.AreaTag.Insert(e.AreaTag.Length - 1, script);
}

Visual Basic

Private Sub htb_CreatingArea(ByVal sender As Object, ByVal e As AreaEventArgs)

    Dim script As String = " onClick=" + Chr(34) + "alert('click click')" + Chr(34)
    e.AreaTag = e.AreaTag.Insert(e.AreaTag.Length - 1, script)

End Sub