Ошибка при получении данных из pgadmin в c# Visual Studio - PullRequest
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Ошибка при получении данных из pgadmin в c# Visual Studio

0 голосов
/ 01 мая 2020

Это мой код для выбора данных из C# в функцию pgadmin: 

private void button_load_Click(object sender, EventArgs e)
{
        try
        {
            DGV_customers.DataSource = null;
            //load all data from table customers
            conn.Open();
            sql = "select * from customers_select()";
            cmd = new NpgsqlCommand(sql, conn);
            dt = new DataTable();
            dt.Load(cmd.ExecuteReader());
            DGV_customers.DataSource = dt;
            conn.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show("Error: " + ex.Message, "FAIL!!!", MessageBoxButtons.OK, MessageBoxIcon.Error);
            conn.Close();
        }
}

Моя функция в pgadmin (postgresql): 

create function customers_select()
returns table
(
    _member_id int,
    _name character,
    _phone_number character,
    _address character,
    _height character,
    _weight character,
    _age character
)
as
$$
begin
    select member_id, name, phone_number, address, height, weight, age;
end
$$
language plpgsql

Это показывает ошибку :

42703: столбец "member_id" не существует

1 Ответ

0 голосов
/ 01 мая 2020 
    private void button_save_insert_Click(object sender, EventArgs e)
    {
        try
        {
            customers_form.DGV_customers.DataSource = null;
            conn.Open();
            sql = @"select * from st_insert(:_member_id,:_name,:_phone:_number,:_address,:_height,:_weight,:_age)";
            cmd = new NpgsqlCommand(sql, conn);
            dt = new DataTable();
            dt.Load(cmd.ExecuteReader());

            //customers_form DGV_customers = new customers_form();
            customers_form.DGV_customers.DataSource = dt;
            customers_form.DGV_customers.Rows.Add(textBox_member_id.Text, textBox_name.Text, textBox_phone_number.Text, textBox_address.Text, textBox_height.Text, textBox_weight.Text, textBox_age.Text);

            cmd.Parameters.AddWithValue("_member_id", textBox_member_id.Text);
            cmd.Parameters.AddWithValue("_name", textBox_name.Text);
            cmd.Parameters.AddWithValue("_phone_number", textBox_phone_number.Text);
            cmd.Parameters.AddWithValue("_address", textBox_address.Text);
            cmd.Parameters.AddWithValue("_height", textBox_height.Text);
            cmd.Parameters.AddWithValue("_weight", textBox_weight.Text);
            cmd.Parameters.AddWithValue("_age", textBox_age.Text);

            if((int)cmd.ExecuteScalar() == 1)
            {
                conn.Close();
                //this.Close();
                MessageBox.Show("Success insert a new Customers", "Saved", MessageBoxButtons.OK, MessageBoxIcon.Information);
                button_save_insert.PerformClick();

            }
        }
        catch(Exception ex)
        {
            MessageBox.Show("Error: "+ex.Message, "INSERT FAIL", MessageBoxButtons.OK, MessageBoxIcon.Error);
            conn.Close();
        }
    }

Функция для вставки в pgadmin: 

    create function st_insert
(
    _name character,
    _phone_number character,
    _address character,
    _height character,
    _weight character,
    _age integer
)returns int as
$$
begin
    insert into customers
    (
        name,
        phone_number,
        address,
        height,
        weight,
        age
    )values
    (
        _name,
        _phone_number,
        _address,
        _height,
        _weight,
        _age
    );
    if found then
        return 1;
    else
        return 0;
    end if;
end
$$
language plpgsql

Показать ошибку в visual studio c#

Ошибка: 42601: синтаксическая ошибка в или около ":"

...