public void MyClassTable()
{
dataGridView1.Rows.Clear();//清空旧数据
pipe pip = new pipe();
string sql = $"select * from SelectClassTB WHERE StuID = '{StuData.StuID}'";
IDataReader dc = pip.read(sql);
string a0, a1;
while (dc.Read())
{
a0 = dc[1].ToString();//便于对数据进行处理
a1 = dc[2].ToString();
string[] table = { a0, a1 };
dataGridView1.Rows.Add(table);
}
dc.Close();
pip.PipClose();
}
public void LeadinStuInfo()
{
pipe pip = new pipe();
string sql = $"select * from StuInfoTB where StuID='{StuData.StuID}'";
IDataReader dc = pip.read(sql);
if (dc.Read())
{
string name = dc[1].ToString();
string classnum = dc[3].ToString();
string credit = dc[2].ToString();
label6.Text = classnum;
label5.Text = credit;
}
else
{
MessageBox.Show("读取学生信息失败");
}
}
public void ClassInfoTB() //从数据库读取数据显示在可选表格中
{
dataGridView2.Rows.Clear(); //清空就数据
pipe pip = new pipe();
string sql = "select * from ClassInfoTB";
IDataReader dc = pip.read(sql);
string a0, a1, a2, a3;
while (dc.Read())
{
a0 = dc[0].ToString();//便于对数据进行处理
a1 = dc[2].ToString();
a2 = dc[1].ToString();
a3 = dc[3].ToString();
string[] table = { a0, a1, a2, a3 };
dataGridView2.Rows.Add(table);
}
dc.Close();
pip.PipClose();
}
private void tbStuID_TextChanged(object sender, EventArgs e)
{
if (tbStuID.Text.Length == 10)
{
//查询学号
pipe pip = new pipe();
string sql = $"select * from StuInfoTB where StuID='{tbStuID.Text}'";
IDataReader dc = pip.read(sql);
if (dc.Read())
{
string name = dc[1].ToString();
label4.Text = name;
StuData.StuName = name;
}
else
{
MessageBox.Show("查询失败");
}
pip.PipClose();
}
}
public void SelectClassTB()
{
dataGridView1.Rows.Clear();//清空就数据
pipe pip = new pipe();
string sql = $"select * from TempSelectClassTB where StuID = '{StuData.StuID}'";
IDataReader dc = pip.read(sql);
string a0, a1;
int classnum = 0;
int credit = 0;
while (dc.Read())
{
a0 = dc[1].ToString();//便于对数据进行处理
a1 = dc[2].ToString();
string[] table = { a0, a1 };
dataGridView1.Rows.Add(table);
classnum++;
credit += int.Parse(a1);
}
dc.Close();
pip.PipClose();
}