private void btnAnterior_Click(object sender, EventArgs e)
{
try
{
paginas[numPagina - 1] = new Pagina(txtAula.Text);
numPagina--;
txtAula.Text = paginas[numPagina - 1].Texto;
if (numPagina == 1)
{
btnAnterior.Enabled = false;
}
}
catch (Exception err)
{
MessageBox.Show(err.Message);
}
}
public static Aula GetAula(string titulo)
{
SqlConnection con = new SqlConnection();
cs = cs.Substring(cs.IndexOf("Data Source"));
con.ConnectionString = cs;
SqlCommand cmd;
SqlDataAdapter adapt;
DataSet ds = new DataSet();
DataRow dr;
cmd = new SqlCommand("Select texto from paginaAula where aula = @aula", con);
cmd.Parameters.AddWithValue("@aula", titulo);
con.Open();
adapt = new SqlDataAdapter(cmd);
ds = new DataSet();
adapt.Fill(ds);
con.Close();
Pagina[] pag = new Pagina[ds.Tables[0].Rows.Count];
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
dr = ds.Tables[0].Rows[i];
pag[i] = new Pagina(dr.ItemArray[0].ToString());
}
cmd = new SqlCommand("Select pergunta, alternativaA, alternativaB, alternativaC, alternativaD, resposta from pergunta where aula = @aula", con);
cmd.Parameters.AddWithValue("@aula", titulo);
con.Open();
adapt = new SqlDataAdapter(cmd);
ds = new DataSet();
adapt.Fill(ds);
con.Close();
Pergunta[] perg = new Pergunta[ds.Tables[0].Rows.Count];
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
dr = ds.Tables[0].Rows[i];
perg[i] = new Pergunta(dr.ItemArray[0].ToString(), dr.ItemArray[1].ToString(), dr.ItemArray[2].ToString(), dr.ItemArray[3].ToString(),
dr.ItemArray[4].ToString(), dr.ItemArray[5].ToString().ToCharArray()[0]);
}
cmd = new SqlCommand("Select * from aula where titulo = @titulo", con);
cmd.Parameters.AddWithValue("@titulo", titulo);
con.Open();
adapt = new SqlDataAdapter(cmd);
ds = new DataSet();
adapt.Fill(ds);
con.Close();
Aula ret;
if (ds.Tables[0].Rows.Count == 1)
{
dr = ds.Tables[0].Rows[0];
ret = new Aula(dr.ItemArray[0].ToString(), dr.ItemArray[1].ToString(), dr.ItemArray[2].ToString(), pag, perg);
}
else
{
throw new Exception("Aula inexistente");
}
return(ret);
}
