public void addCourseStu()
{
try
{
string strCon = "server=127.0.0.1;uid=sa;pwd=123456;database=ClassAttendanceManageSystem";
SqlConnection connection = new SqlConnection(strCon);
DataSet myDataSet = new DataSet();
string sql = "Select *from studentInfo";
string str = "insert into studentInfo VALUES ('" + id + "','" + name + "','" + sex + "','" + cid + "','" + cname + "','" + cardid + "','" + strcourseid + "','" + psw + "')";
connection.Open();
SqlCommand xg;
xg = new SqlCommand(str, connection);
if (xg.ExecuteNonQuery() > 0) //判断是否成功
{ //执行要操作的语句
SqlDataAdapter mycommand = new SqlDataAdapter(sql, connection);
myDataSet.Clear();
mycommand.Fill(myDataSet, "studentInfo");
MessageBox.Show("选课成功!请刷新!");
this.Close();
Form_studentMain a = new Form_studentMain();
a.ShowDialog();
// Form_teacherMain.dataGridView1.DataSource = myDataSet.Tables["courseInfo"];
}
connection.Close();
}
catch (Exception x)
{
MessageBox.Show("error!" + x.ToString());
}
}
private void button_login_Click(object sender, EventArgs e)
{
//这里写入刚刚的判断语句
if (!judge())
{
MessageBox.Show("账号或密码为空,请正确输入信息", "提示");
return;
}
try
{
string strCon = "server=127.0.0.1;uid=sa;pwd=123456;database=ClassAttendanceManageSystem";
SqlConnection connection = new SqlConnection(strCon);
DataSet myDataSet = new DataSet();
if (flag == 1) //radioButton1_stu 判断是否为学生用户
{
string sql = "Select *from studentInfo where stuID ='" + textBox1.Text.Trim() +
"' and stuPassword='******'";
connection.Open();
SqlDataAdapter mycommand = new SqlDataAdapter(sql, connection);
myDataSet.Clear();
mycommand.Fill(myDataSet, "studentInfo");
connection.Close();
if (myDataSet.Tables["studentInfo"].Rows.Count > 0)
{
MessageBox.Show("登录成功！", "提示");
this.Visible = false;
Form_studentMain stu = new Form_studentMain();
str = textBox1.Text; //注意，这句不能放在stu.Show();的后面，否则将传值不到其他窗体；会先执行textBox2.Text =stu.str;再执行str = textBox1.Text;
str1 = textBox2.Text; //保存密码
stu.Show();
}
else
{
MessageBox.Show("用户名或密码错误！", "提示");
}
}
else if (flag == 2)
{
string sql = "Select *from teacherInfo where teacherID ='" + textBox1.Text.Trim() + "' and teacherPassword='******'";
connection.Open();
SqlDataAdapter mycommand = new SqlDataAdapter(sql, connection);
myDataSet.Clear();
mycommand.Fill(myDataSet, "teacherInfo");
connection.Close();
if (myDataSet.Tables["teacherInfo"].Rows.Count > 0)
{
MessageBox.Show("登录成功！", "提示");
this.Visible = false;
Form_teacherMain a = new Form_teacherMain();
str = textBox1.Text; //注意，这句不能放在f2.ShowDialog();的后面，否则会先执行textBox2.Text = f1.str;再执行str = textBox1.Text;
str1 = textBox2.Text; //保存密码
a.ShowDialog();
}
else
{
MessageBox.Show("用户名或密码错误！", "提示");
}
}
else if (flag == 3)
{
string sql = "Select *from adminInfo where adminID ='" + textBox1.Text.Trim() + "' and adminPassword='******'";
connection.Open();
SqlDataAdapter mycommand = new SqlDataAdapter(sql, connection);
myDataSet.Clear();
mycommand.Fill(myDataSet, "adminInfo");
connection.Close();
if (myDataSet.Tables["adminInfo"].Rows.Count > 0)
{
MessageBox.Show("登录成功！", "提示");
this.Visible = false;
Form_adminMain a = new Form_adminMain();
str = textBox1.Text; //注意，这句不能放在f2.ShowDialog();的后面，否则会先执行textBox2.Text = f1.str;再执行str = textBox1.Text;
str1 = textBox2.Text; //保存密码
a.ShowDialog();
}
else
{
MessageBox.Show("用户名或密码错误！", "提示");
}
}
else
{
MessageBox.Show("请选择用户类型！", "提示");
}
}
catch (Exception x)
{
MessageBox.Show("error!" + x.ToString());
}
}