string txt1 = "Data Source=pc2011091520fha;DataBase=学生;Integrated Security=SSPI;User Instance=False";
            SqlConnection conn = new SqlConnection(txt1);                     
            string txt2 = "Insert Into 学生信息表(学号,姓名,性别，政治面貌，籍贯，手机)Values('";
            txt2 += textBox1.Text + "','";
            txt2 += textBox2.Text + "','";
            txt2 += comboBox2.Text + "','";
            txt2 += comboBox1.Text + "','";
            txt2 += textBox5.Text + "','";
            txt2 += textBox6.Text + "')";
            conn.Open();   
            SqlCommand  da=new SqlCommand (txt2,conn);
            da.ExecuteNonQuery();
            textBox1.Text = "";
            textBox2.Text = "";
            comboBox2.Text = "";
            comboBox1.Text = "";
            textBox5.Text = "";
            textBox6.Text = "";
            MessageBox.Show("添加成功！");
            da.Dispose();
            conn.Close();