Public Overloads Function Add( _
   ByVal toolTip As String, _
   ByVal href As String, _
   ByVal attr As String, _
   ByVal rect As RectangleF _
) As Integer

Visual Basic (Usage)	Copy Code
Dim instance As MapAreasCollection Dim toolTip As String Dim href As String Dim attr As String Dim rect As RectangleF Dim value As Integer   value = instance.Add(toolTip, href, attr, rect)

public int Add( 
   string toolTip,
   string href,
   string attr,
   RectangleF rect
)

Parameters

toolTip

The tooltip of the map area, which corresponds to the html <AREA> tag's Title attribute. Multi-line tooltips can be used using a carriage return/line feed (e.g. vbCrLf for VB).

Tool tip.

href

The destination URL or anchor point of the map area. Corresponds to the html <AREA> tag's HREF attribute.

Jump URL.

attr

One or more map area attributes. The entire string expression is appended at the end of the <AREA> tag.

Other area attributes.

rect

A RectangleF structure that defines the shape of the map area's rectangle.

Rect coordinates

Return Value

An integer that represents the index where the item was inserted into the collection (0-based).

The following sample creates a map area in the shape of a rectangle. A RectangleF structure defines the shape of the map area.

Visual Basic	Copy Code
Dim myRectF As New System.Drawing.RectangleF() 'set position of rectangleF structure myRectF.X = 20 myRectF.Y = 20 myRectF.Width = 80 myRectF.Height = 80 'create the map area Chart1.MapAreas.Add ("Tooltip1" & vbCrLf & "Tooltip2", "http://www.SomeDomain.com", "Target=_Blank", myRectF)

Appends a MapArea object to the end of the collection, using the specified parameters to set the map area properties.

The attr parameter is used for map attributes such as "Target=_Blank", "OnClick="javascript:MyJavaScriptFunction()", etc.

Chart coordinates are used when setting the position of the rectangle. "0,0" represents the top-left corner of the chart image and "100,100" represents the bottom-right corner of the chart image. To find out more about the chart's coordinate system see the Chart Coordinate System topic.

IMPORTANT: To create an image map this way the RenderType property of the Chart object MUST be RenderType.ImageTag. It is possible to create an image map when using binary streaming, but another technique must be used. Refer to the Client-Side Mapping and Binary Streaming  topic for further details.

To create a map area that has a custom shape use the definition that takes a GraphicsPath object.

Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family

Reference