数据库DAL学习(1)

以前从未接触过网页设计（好吧，小学粗浅的学过），因此对asp.net并不是特别熟悉。

然而C#连接数据库在上学期的已经自己尝试做过一个管理系统，并且取得了成功。（我不想承认我用的是Acess)

部分代码如下

private void button1_Click(object sender, EventArgs e)

        {



            string strConnection = "Provider=Microsoft.ACE.OLEDB.12.0;";

            strConnection += @"Data Source=Database.accdb";

            OleDbConnection objConnection = new OleDbConnection(strConnection);

            if (comboBox1.Text == "系统管理员")

            {

                objConnection.Open();

                OleDbCommand comm = new OleDbCommand("select * from 系统管理员 where User='" + textBox1.Text + "'AND Code='" + textBox2.Text + "'", objConnection);

                OleDbDataReader sda = comm.ExecuteReader();

                sda.Read();

                if (log(sda) == 1)

                {

                    系统管理员 f = new 系统管理员();

                    f.Show();

                }

            }

            if (comboBox1.Text == "项目管理员")

            {

                objConnection.Open();

                OleDbCommand comm = new OleDbCommand("select * from 项目管理员 where User='" + textBox1.Text + "'AND Code='" + textBox2.Text + "'", objConnection);

                OleDbDataReader sda = comm.ExecuteReader();

                sda.Read();

                if (log(sda) == 1)

                {

                    项目管理员 f = new 项目管理员(""+textBox1.Text+"");

                    f.Show();

                }

            }

            if (comboBox1.Text == "项目经理")

            {

                objConnection.Open();

                OleDbCommand comm = new OleDbCommand("select * from 项目经理 where User='" + textBox1.Text + "'AND Code='" + textBox2.Text + "'", objConnection);

                OleDbDataReader sda = comm.ExecuteReader();

                sda.Read();

                if (log(sda) == 1)

                {

                    项目经理 f = new 项目经理(""+textBox1.Text+"");

                    f.Show();

                }

            }

            if (comboBox1.Text == "项目组员")

            {

                objConnection.Open();

                OleDbCommand comm = new OleDbCommand("select * from 项目组员 where User='" + textBox1.Text + "'AND Code='" + textBox2.Text + "'", objConnection);

                OleDbDataReader sda = comm.ExecuteReader();

                sda.Read();

                if (log(sda)==1)

                {

                    项目组员 f = new 项目组员(""+textBox1.Text+"");

                    f.Show();

                }

            }

            if (comboBox1.Text == "总经理")

            {

                objConnection.Open();

                OleDbCommand comm = new OleDbCommand("select * from 总经理 where User='" + textBox1.Text + "'AND Code='" + textBox2.Text + "'", objConnection);

                OleDbDataReader sda = comm.ExecuteReader();

                sda.Read();

                if (log(sda)==1)

                {

                    总经理 f = new 总经理();

                    f.Show();

                }

            }

        }

        public int log(OleDbDataReader test)

        {

            if (test.HasRows == true)

            {

                MessageBox.Show("登陆成功");

                this.Hide();

                return 1;

            }

            else

            {

                MessageBox.Show("用户名或密码错误");

                return 0;

            }

        }

而sql server的调动基本与access是一样的。（未完待续）