C#数据库问题

Question

有人可以告诉我为什么这不是将值添加到数据库中.表单运行正常,不会返回任何错误.

    private void button1_Click(object sender, EventArgs e)
    {
        SqlConnection connection = new SqlConnection();
        SqlCommand command = new SqlCommand();

        connection.ConnectionString = (@"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\John\Documents\Setup.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True");

        command.Parameters.AddWithValue("@userName", textBox1.Text);
        command.Parameters.AddWithValue("@passWord", textBox2.Text);
        command.CommandText = "INSERT INTO Setup (userName, password) VALUES(@userName, @passWord)";



        try
        {
            connection.Open();
            int rowsAffected = command.ExecuteNonQuery();

        }
        catch (Exception ex)
        {
            // handle exception
        }
        finally
        {
            connection.Close();
        }


    }

仅供参考:我是"新手"我的数据库名为Setup.我手动添加了一个名为myTable的表,其中包含2列userName,另一个名为password,两者都设置为nchar(50)

Answer 1

您需要指定Table,而不是数据库(在连接字符串中使用).在表名中添加了模式前缀:

command.CommandText = "INSERT INTO dbo.myTable (userName, password) VALUES (@userName, @passWord)";

并添加:

command.Connection = connection;

将Command对象与连接对象关联.