Creating a clickable map

文章目錄

• Creating a clickable map

Creating a clickable map

1. Insert a PictureBox when using Win Forms or an <asp:ImageButton> for ASP.NET web forms.
2. Set the image to your map-instance. Ex.: myImage.Image = myMap.GetMap();
3. Set up a click-event for your PictureBox/ImageButton.
4. Create a click-event handler, similar to the one below.

protected void imgMap_Click(object sender, ImageClickEventArgs e)

{     //Center the map on the click-point

    myMap.Center = myMap.ImageToWorld(new System.Drawing.PointF(e.X, e.Y), myMap); 

    //Zoom in 2x

    myMap.Zoom *= 0.5;

    //Call function that renders the map and returns it to the client

    myImage.Image = myMap.GetMap();}

Note: When using ASP.NET, you need to store the zoom and center values between requests. This can be done using either ViewState or Session variables. These should be restored on a postback, and stored when they are changed.