参考http://www.cnblogs.com/wnaisheng/

Creates a map and adds an ArcGISTiledMapServiceLayer.
Map navigation using mouse:

• Drag to pan
• SHIFT + Click to recenter
• Mouse Scroll Forward to zoom in
• Mouse Scroll Backward to zoom out
• Use Arrow keys to pan
• + key to zoom in a level
• - key to zoom out a level
• Double Click to Center and Zoom in