private void classBType(int caseNumber)
{
try
{
if (caseNumber == 1)
{
sda = new SqlDataAdapter("SELECT * From [tblStudentB]", con);
}
else if (caseNumber == 2)
{
sda = new SqlDataAdapter("SELECT * From [tblStudentB] Where [Gender] = 'Male'", con);
}
else if (caseNumber == 3)
{
sda = new SqlDataAdapter("SELECT * From [tblStudentB] Where [Gender] = 'Female'", con);
}
else if (caseNumber == 4)
{
sda = new SqlDataAdapter("SELECT * From [tblStudentB] Where [EAL?] = 'Y'", con);
}
else
{
sda = new SqlDataAdapter("SELECT * From [tblStudentB] Where [Disadvantaged?] = 'Y'", con);
}
}
catch (Exception e)
{
errorTracking et = new errorTracking();
et.outputErrorToText(e.Message);
}
}
//displays retrieved items required from the database (class A and B)
public void queryDatabase(int caseNumber, StudentDataForm sdf)
{
try
{
if (sdf.cmbClass.Text == "Class A")
{
ConnectToDB();
con.Open();
//call method to set the query data.
classAType(caseNumber);
dt = new DataTable();
sda.Fill(dt);
sdf.dgvStudentProgress.DataSource = dt;
con.Close();
}
else if (sdf.cmbClass.Text == "Class B")
{
ConnectToDB();
con.Open();
//call method to set the query data.
classBType(caseNumber);
dt = new DataTable();
sda.Fill(dt);
sdf.dgvStudentProgress.DataSource = dt;
con.Close();
}
}
catch (Exception e)
{
errorTracking et = new errorTracking();
et.outputErrorToText(e.Message);
}
}
//clear the Form, DataTable and closes the connection.
public void clearDT(StudentDataForm sdf)
{
try
{
con.Open();
dt.Clear();
con.Close();
}
catch (Exception e)
{
errorTracking et = new errorTracking();
et.outputErrorToText(e.Message);
}
}
//updates the database with any changes (selected cells can be modified)
public void update(StudentDataForm sdf)
{
try
{
con.Open();
scb = new SqlCommandBuilder(sda);
sda.Update(dt);
con.Close();
}
catch (Exception e)
{
errorTracking et = new errorTracking();
et.outputErrorToText(e.Message);
}
}
