private Task ClearAsync()
{
var factory = new DbProviderFactoriesSample();
var expression = "DELETE FROM Names";
var connection = factory.GetConnection();
//var task = connection.OpenAsync();
//using (var connection2 = factory.GetConnection())
//{
// connection2.OpenAsync().ContinueWith(_ =>
// {
// var clearCommand = connection2.CreateCommand();
// clearCommand.CommandText = expression;
// clearCommand.ExecuteNonQuery();
// });
//}
return(connection.OpenAsync().ContinueWith(_ =>
{
var clearCommand = connection.CreateCommand();
clearCommand.CommandText = expression;
clearCommand.ExecuteNonQuery();
connection.Close();
}));
}
private Task FillAsync(int iterations)
{
var factory = new DbProviderFactoriesSample();
var expression = "";
var task = Task.Run(() =>
{
var insertRaw = "INSERT INTO Names(Name) VALUES('Vlad') ";
expression = "";
for (int i = 0; i < iterations; i++)
{
expression += insertRaw;
}
}).ContinueWith(t =>
{
var connection = factory.GetConnection();
connection.OpenAsync().ContinueWith(_ =>
{
var fillCommand = connection.CreateCommand();
fillCommand.CommandText = expression;
fillCommand.ExecuteNonQuery();
});
});
return(task);
}
private Task ReadAsync(IList <NameViewModel> names)
{
var factory = new DbProviderFactoriesSample();
var expression = "SELECT * FROM Names";
var connection = factory.GetConnection();
return(connection.OpenAsync().ContinueWith(_ =>
{
var readCommand = connection.CreateCommand();
readCommand.CommandText = expression;
readCommand.ExecuteReaderAsync().ContinueWith(t =>
{
while (t.Result.Read())
{
Application.Current.Dispatcher.Invoke(() =>
{
names.Add(new NameViewModel
{
Id = t.Result.GetInt32(0),
Name = t.Result.GetString(1)
});
});
//names.Add(new NameViewModel
//{
// Id = t.Result.GetInt32(0),
// Name = t.Result.GetString(1)
//});
}
connection.Close();
}
);
}));
}
private void Clear()
{
var factory = new DbProviderFactoriesSample();
var expression = "DELETE FROM Names";
using (var connection = factory.GetConnection())
{
connection.Open();
var clearCommand = connection.CreateCommand();
clearCommand.CommandText = expression;
clearCommand.ExecuteNonQuery();
}
}
private void Read()
{
var factory = new DbProviderFactoriesSample();
var expression = "SELECT * FROM Names";
using (var connection = factory.GetConnection())
{
connection.Open();
var readCommand = connection.CreateCommand();
readCommand.CommandText = expression;
var reader = readCommand.ExecuteReader();
while (reader.Read())
{
Console.WriteLine($"ID: {reader.GetInt32(0)}\tName: {reader.GetString(1)}");
}
}
}
private void Fill(int iterations)
{
var factory = new DbProviderFactoriesSample();
var insertRaw = "INSERT INTO Names(Name) VALUES('Vlad') ";
var expression = "";
for (int i = 0; i < iterations; i++)
{
expression += insertRaw;
}
using (var connection = factory.GetConnection())
{
connection.Open();
var fillCommand = connection.CreateCommand();
fillCommand.CommandText = expression;
fillCommand.ExecuteNonQuery();
}
}
private void Read(IList <NameViewModel> names)
{
var factory = new DbProviderFactoriesSample();
var expression = "SELECT * FROM Names";
using (var connection = factory.GetConnection())
{
connection.Open();
var readCommand = connection.CreateCommand();
readCommand.CommandText = expression;
var reader = readCommand.ExecuteReader();
while (reader.Read())
{
names.Add(new NameViewModel
{
Id = reader.GetInt32(0),
Name = reader.GetString(1)
});
}
}
}
private Task ReadAsync()
{
var factory = new DbProviderFactoriesSample();
var expression = "SELECT * FROM Names";
var connection = factory.GetConnection();
return(connection.OpenAsync().ContinueWith(_ =>
{
completed = true;
var readCommand = connection.CreateCommand();
readCommand.CommandText = expression;
readCommand.ExecuteReaderAsync().ContinueWith(t =>
{
while (t.Result.Read())
{
Console.WriteLine($"ID: {t.Result.GetInt32(0)}\tName: {t.Result.GetString(1)}");
}
connection.Close();
}
);
}));
}
