本文整理汇总了C#中System.Data.SQLite.SQLiteConnection.First方法的典型用法代码示例。如果您正苦于以下问题：C# SQLiteConnection.First方法的具体用法？C# SQLiteConnection.First怎么用？C# SQLiteConnection.First使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Data.SQLite.SQLiteConnection的用法示例。
在下文中一共展示了SQLiteConnection.First方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
/// <summary>
/// Mains.
/// </summary>
/// <param name="args">The arguments.</param>
static void Main(string[] args)
{
CommandBuilderFactory.Assign(mapper => new SqliteCommandBuilder(mapper));
string cs = "URI=file:test.db";
var connection = new SQLiteConnection(cs);
connection.Open();
if (!connection.TableExists("Users"))
{
using (var uow = new AdoNetUnitOfWork(connection))
{
uow.Execute(
"CREATE TABLE Users (Id INTEGER PRIMARY KEY AUTOINCREMENT, FirstName TEXT, LastName text, CreatedAtUtc INTEGER)");
uow.SaveChanges();
}
}
var users = connection.ToList<User>("firstName = @FirstName", new {FirstName = "Gau%"});
try
{
var first = connection.First<User>(new {Id = 1});
}
catch (EntityNotFoundException x)
{
Console.WriteLine("Expected to find user, since First was used instead of FirstOrDefault. User friendly error message: " + x.Message);
}
// clear old data
using (var uow = new AdoNetUnitOfWork(connection))
{
using (var cmd = uow.CreateCommand())
{
cmd.CommandText = "SELECT * FROM Users";
cmd.AddParameter("id", "983498043903");
foreach (var entity in cmd.ToEnumerable<User>())
{
Console.WriteLine(entity.FirstName);
}
}
uow.Truncate<User>();
for (int i = 0; i < 100; i++)
{
uow.Insert(new User { FirstName = "Arne" + i });
}
uow.SaveChanges();
}
Console.WriteLine("Press ENTER to quit.");
Console.ReadLine();
}示例2: Main
static void Main(string[] args)
{
CommandBuilderFactory.Assign(mapper => new SqliteCommandBuilder(mapper));
string cs = "URI=file:test.db";
var connection = new SQLiteConnection(cs);
connection.Open();
if (!connection.TableExists("Users"))
{
using (var uow = new AdoNetUnitOfWork(connection))
{
uow.Execute(
"CREATE TABLE Users (Id INTEGER PRIMARY KEY AUTOINCREMENT, FirstName TEXT, LastName text, CreatedAtUtc INTEGER)");
uow.SaveChanges();
}
}
var users = connection.ToList<User>(new {FirstName = "Gau%"});
var first = connection.First<User>(new {Id = 1});
// clear old data
using (var uow = new AdoNetUnitOfWork(connection))
{
using (var cmd = uow.CreateCommand())
{
cmd.CommandText = "SELECT * FROM Users";
cmd.AddParameter("id", "983498043903");
foreach (var entity in cmd.ToEnumerable<User>())
{
Console.WriteLine(entity.FirstName);
}
}
uow.Truncate<User>();
for (int i = 0; i < 100; i++)
{
uow.Insert(new User { FirstName = "Arne" + i });
}
uow.SaveChanges();
}
}