软件工程课程设计报告(19)

SqlConnection thisConnection = new SqlConnection(

"Server=LENOVO-3927D0AD\\SQLEXPRESS;Integrated Security=True;" + "Database=stu");

thisAdapter = new SqlDataAdapter("select f_username[用户名],f_password[密码],f_limit[权限] from t_user", thisConnection);

SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter); thisAdapter.Fill(thisDataSet, "t_user");

dataGridView1.DataSource = thisDataSet.Tables[0]; }

private void button1_Click(object sender, EventArgs e) { try {

SqlConnection thisConnection = new SqlConnection(

"Server=LENOVO-3927D0AD\\SQLEXPRESS;Integrated Security=True;" + "Database=stu"); thisConnection.Open();

SqlCommand thisCommand = thisConnection.CreateCommand();

http://www.77cn.com.cnmandText = "insert into t_user(f_username,f_password,f_limit) values('" +

textBox1.Text.ToString().Trim() + "','" + textBox2.Text.ToString().Trim() + "','" + textBox3.Text.ToString().Trim() + "')"; thisCommand.ExecuteNonQuery();

thisAdapter = new SqlDataAdapter("select f_username[用户名],f_password[密码],f_limit[权限] from t_user", thisConnection); thisDataSet.Clear();

SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter); thisAdapter.Fill(thisDataSet, "t_user");

dataGridView1.DataSource = thisDataSet.Tables[0]; } catch

{ MessageBox.Show("请检查输入格式是否正确？"); } }

private void button3_Click(object sender, EventArgs e) {

SqlConnection thisConnection = new SqlConnection(

"Server=LENOVO-3927D0AD\\SQLEXPRESS;Integrated Security=True;" + "Database=stu"); thisConnection.Open();

SqlCommand thisCommand = thisConnection.CreateCommand();

http://www.77cn.com.cnmandText = "delete from t_user(f_username,f_password,f_limit) values('" +

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