本文介绍了创建地理围栏,同时将位置存储到 sqlite 数据库的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在开发 windows 移动应用程序.我想在将位置存储到 sqlite 数据库时创建地理围栏,以便在进入地理围栏时生成 SMS 警报.我正在通过地图将位置加载到文本框.
I am developing windows mobile application. I want to create geofence when storing the location to the sqlite database to generate SMS alerts when entering to the geofence. I am loading the location to the text boxes through map.
这是目前的代码
private void Load_Location(object sender, RoutedEventArgs e)
{
LattxtBx.Text = String.Format("{0}", AddLocation.Center.Position.Latitude);
LongtxtBx.Text = String.Format("{0}", AddLocation.Center.Position.Longitude);
}
private async void AddContact_Click(object sender, RoutedEventArgs e)
{
DatabaseHelperClass Db_Helper = new DatabaseHelperClass();//Creating object for DatabaseHelperClass.cs from ViewModel/DatabaseHelperClass.cs
if (NametxtBx.Text != "" & AgetxtBx.Text != "" & AddresstxtBx.Text != "" & SchooltxtBx.Text != "" & GardienttxtBx.Text != "" & PhonetxtBx.Text != "" & LattxtBx.Text != "" & LongtxtBx.Text != "")
{
Db_Helper.Insert(new Contacts(NametxtBx.Text, AgetxtBx.Text, AddresstxtBx.Text, SchooltxtBx.Text, GardienttxtBx.Text, PhonetxtBx.Text, LattxtBx.Text, LongtxtBx.Text));
Frame.Navigate(typeof(ReadContactList));//after add contact redirect to contact listbox page
}
else
{
MessageDialog messageDialog = new MessageDialog("Please fill all fields");//Text should not be empty
await messageDialog.ShowAsync();
}
}
推荐答案
Jan 编写了一个算法来检查经纬度是否在围栏内(经纬度列表)参见 这里
Jan has written an algorithm to check if a lat/long is inside a fence (a list of lat/longs) See here
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