/// <summary>
/// 地图加载完成事件，将把地图置于背景之上
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void PictureBox1_LoadCompleted(object sender, AsyncCompletedEventArgs e)
{
MapPicture.BringToFront();
}
/// <summary>
/// 地图加载完成事件，将把地图置于背景之上
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void PictureBox1_LoadCompleted(object sender, AsyncCompletedEventArgs e)
{
MapPicture.BringToFront();
}
