Question

我在Sqlite中为表添加约束如下：

using System.Windows;
using System.ComponentModel;

namespace WpfApplication1
{

    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        BindingList<FamilyMember> Family = new BindingList<FamilyMember>();

        public MainWindow()
        {
            InitializeComponent();
            InitializeDG();
            AddFamilyMembers();
        }

        private void InitializeDG()
        {
            dg_MainGrid.ItemsSource = Family;
            dg_MainGrid.AutoGenerateColumns = true;
        }

        private void AddFamilyMembers()
        {
            Family.Add(new FamilyMember { FName = "Name1", LName = "D", Notes = "34" });
            Family.Add(new FamilyMember { FName = "Name2", LName = "L", Notes = "36" });
            Family.Add(new FamilyMember { FName = "Name3", LName = "D", Notes = "7" });
            Family.Add(new FamilyMember { FName = "Name3", LName = "D", Notes = "5" });
        }
        private void button_Click(object sender, RoutedEventArgs e)
        {
            string TheName = ((FamilyMember)dg_MainGrid.SelectedItem).FName;//get the selected FName
        }
    }

    public class FamilyMember
    {
        public string FName { get; set; }
        public string LName { get; set; }
        public string Notes { get; set; }
    }
}

我在SQL Server数据库中使用此代码，但在SQLite中未被接受。

如何在Sqlite中创建这样的约束？

Answer 1

SQLite3中的ALTER命令仅限于添加列或重命名表，因此您无法执行此操作。相反，您必须使用所需的约束重新创建表。

在Sqlite中为表添加约束

1 个答案: