Xamarin.forms SQLite.NET PCL在自动增量主键的所有实例中返回0
我完全不明白这一点,因为我已经在Xamarin应用程序中使用这个库好几年了 我有一个基类,它包含在所有db项中通用的属性:Xamarin.forms SQLite.NET PCL在自动增量主键的所有实例中返回0,xamarin.forms,sqlite-net,sqlite-net-pcl,Xamarin.forms,Sqlite Net,Sqlite Net Pcl,我完全不明白这一点,因为我已经在Xamarin应用程序中使用这个库好几年了 我有一个基类,它包含在所有db项中通用的属性: public class BaseItem { [PrimaryKey, AutoIncrement] public int ID { get; set; } = 0; // SQLite ID public long CreatedTimeSeconds { get; set; } = DateTime.Now.ToUnixTimeS
public class BaseItem
{
[PrimaryKey, AutoIncrement]
public int ID { get; set; } = 0; // SQLite ID
public long CreatedTimeSeconds { get; set; } = DateTime.Now.ToUnixTimeSeconds();
public long ModifiedTimeSeconds { get; set; } = DateTime.Now.ToUnixTimeSeconds();
}
现在,我从中得出:
[Table("CategoryTable")]
public class Category : BaseItem
{
public int CategoryTypeID { get; set; } = (int)CategoryType.Invalid;
public string Name { get; set; } = string.Empty;
public string Description { get; set; } = string.Empty;
}
以下是我所看到的内容的简化版本:
public class DBWorld
{
ISQLiteService SQLite { get { return DependencyService.Get<ISQLiteService>(); } }
private readonly SQLiteConnection _conn;
public DBWorld()
{
_conn = SQLite.GetConnection("myapp.sqlite");
}
public void TestThis()
{
_conn.CreateTable<Category>();
var category = new Category();
category.Name = "This Should Work";
int recCount = connection.Insert(category);
// at this point recCount shows as 1, and category.ID shows as zero.
// I thought Insert was supposed to set the autoincrement primary key
// regardless, it should be set in the database, right? So...
var categoryList = connection.Query<Category>($"SELECT * FROM {DBConstants.CategoryTableName}");
// at this point categoryList[0] contains all the expected values, except ID = 0
}
}
我显然错过了一些东西,但就我的一生而言,我不知道是什么…就像在VisualStudio Xamarin世界中发生的许多其他奇怪的事情一样,当我稍后返回时,这一切都按照我们所有人的预期进行。我想Visual Studio只是太累了,需要重新启动。您的意思是PrimaryKey没有自动递增?正确。但是,标准的Microsoft初始修复程序使其工作正常。我重新启动了我的电脑,一切正常。