private bool login()
{
if (textBox1.Text == "" || textBox2.Text == "" || comboBox1.Text == "")
{
MessageBox.Show("输入不完整或者错误，请重新输入", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return(false);
}
if (comboBox1.Text == "学生")
{
string sql = "select *from student where Name='" + textBox1.Text + "'and Password='******'";
Dao1 dao = new Dao1();
IDataReader dr = dao.read(sql);
if (dr.Read())
{
return(true);
}
else
{
MessageBox.Show("输入有误，请检查后重新输入", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return(false);
}
}
if (comboBox1.Text == "老师")
{
string sql = "select *from Teacher where Name='" + textBox1.Text + "'and Password='******'";
Dao1 dao = new Dao1();
IDataReader dr = dao.read(sql);
if (dr.Read())
{
return(true);
}
else
{
MessageBox.Show("输入有误，请检查后重新输入", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return(false);
}
}
if (comboBox1.Text == "管理员")
{
if (textBox1.Text == "admin" && textBox2.Text == "123456")
{
return(true);
}
else
{
MessageBox.Show("输入有误，请检查后重新输入", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return(false);
}
}
return(false);
}
private void Table()
{
string sql = "select*from class";
Dao1 dao = new Dao1();
IDataReader dr = dao.read(sql);
while (dr.Read())
{
string a, b, c;
a = dr["Date"].ToString();
b = dr["Sjd"].ToString();
c = dr["Id"].ToString();
string[] str = { a, b, c };
dataGridView1.Rows.Add(str);
}
dr.Close();
}
private void Table()
{
dataGridView1.Rows.Clear();
string sql = "select*from Yy";
Dao1 dao = new Dao1();
IDataReader dr = dao.read(sql);
while (dr.Read())
{
string a, b, c, d, o;
a = dr["Id"].ToString();
b = dr["Name"].ToString();
c = dr["Date"].ToString();
d = dr["Sjd"].ToString();
o = dr["Classid"].ToString();
string[] str = { a, b, c, d, o };
dataGridView1.Rows.Add(str);
}
dr.Close();
}
private void button1_Click(object sender, EventArgs e)
{
if (textBox1.Text == "" || textBox2.Text == "")
{
MessageBox.Show("学号和姓名不能为空，请重新输入！");
}
else
{
string sql = "select *from Yy where Id='" + textBox1.Text + "'and Name='" + textBox2.Text + "'";
Dao1 dao = new Dao1();
IDataReader dr = dao.read(sql);
if (dr.Read())
{
table();
}
else
{
MessageBox.Show("没有查询到信息，请检查后重新输入", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
}
