// Generate the chart in order to get the correct coordinates from the click position. bp = Chart.GetChartBitmap();
// Get x and y points int x = Convert.ToInt32( Page.Request.Params["x"]); int y = Convert.ToInt32(Page.Request.Params["y"]); PointF p = Chart.Mapping.GetLatLongCoordinates(new Point(x,y));
// Create a layer with a point at the clicked position. MapLayer layer2 = new MapLayer(); layer2.AddLatLongPoint(p,new ElementMarker(ElementMarkerType.Circle,8,Color.Red)); Chart.Mapping.MapLayerCollection.Add(layer2); iLabel.Text+="<BR>Latitude: " + p.X + " Longitude: " + p.Y;
}
// Generate the chart again to show the added point. bp = Chart.GetChartBitmap(); string fileName = Chart.FileManager.SaveImage(bp);
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Chart.Type = ChartType.Map Chart.Size = "600x350" Chart.TempDirectory = "temp" Chart.Debug = True 'Chart.Title = ".netCHARTING Sample"; Chart.Visible = False Chart.ChartArea.Label.Text = "Please click on a point on this map" Chart.ChartArea.Background = New Background(Color.FromArgb(142,195,236),Color.FromArgb(63,137,200),90) Chart.Mapping.DefaultShape.Background.Color = Color.LightGray
' Demonstrates adding a point to a projected map based on lat/long coordinates of the click. ' FullScreen
Chart.Mapping.MapLayerCollection.Add("../../images/MapFiles/primusa.shp") Dim bp As Bitmap = Nothing
If Not Page.Request.Params("y") Is Nothing AndAlso Not Page.Request.Params("x") Is Nothing Then
' Generate the chart in order to get the correct coordinates from the click position. bp = Chart.GetChartBitmap()
' Get x and y points Dim x As Integer = Convert.ToInt32(Page.Request.Params("x")) Dim y As Integer = Convert.ToInt32(Page.Request.Params("y")) Dim p As PointF = Chart.Mapping.GetLatLongCoordinates(New Point(x,y))
' Create a layer with a point at the clicked position. Dim layer2 As MapLayer = New MapLayer() layer2.AddLatLongPoint(p,New ElementMarker(ElementMarkerType.Circle,8,Color.Red)) Chart.Mapping.MapLayerCollection.Add(layer2) iLabel.Text &= "<BR>Latitude: " & p.X & " Longitude: " & p.Y
End If
' Generate the chart again to show the added point. bp = Chart.GetChartBitmap() Dim fileName As String = Chart.FileManager.SaveImage(bp)
imageLabel.Text &= "<input type=image value=""submit"" border=0 src=""" & fileName & """ ISMAP>" bp.Dispose() End Sub
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