private void btnDelete_Click(object sender, EventArgs e)
{
if (!DeleteGotEmptyField() && IsMidExist2() && !DeleteGotEmptyField())
{
if (MessageBox.Show("Confirm to delete?", "Delete Confirmation", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
var mid = Convert.ToInt32(txtMIDDelete.Text);
Member nMember = context.Members.Where(x => x.MemberID == mid).First();
IssueTran issue = context.IssueTrans.Where(x => x.MemberID == mid).First();
context.IssueTrans.Remove(issue);
context.Members.Remove(nMember);
MessageBox.Show("Delete Successfully.");
}
}
context.SaveChanges();
}
private void btnSubmit_Click(object sender, EventArgs e)
{
lblMIDWarning.Visible = false;
if (hasFieldEmpty() == true)
{
MessageBox.Show("All fields must be filled/selected. Please indicate NA if no remarks to be made. ");
}
else
{
using (TransactionScope ts = new TransactionScope())
{
try
{
IssueTran IT = context.IssueTrans.Where(x => x.TransactionID == TransactionID).First();
IT.DateActualReturn = DateActualReturn;
IT.LoanStatus = "IN";
IT.Remarks = txtRemark.Text;
IT.OverdueFine = fineAmount;
IT.FinePaymentStatus = cboBoxPaymentStatus.SelectedItem.ToString();
IT.BookID = bookID;
Member ML = context.Members.Where(x => x.MemberID == MemberID).First();
BookListing BL = context.BookListings.Where(x => x.BookID == bookID).First();
if (BL.NumberLoaned > 0 && ML.CurrentNumberOnLoan > 0)
{
BL.NumberLoaned--;
ML.CurrentNumberOnLoan--;
MessageBox.Show("Book Return is successful.");
}
else
{
MessageBox.Show("There is an error in the number of books on loan. Please check on transaction record.");
}
context.SaveChanges();
ts.Complete();
}
catch (TransactionException ex)
{
ts.Dispose();
MessageBox.Show("Transaction Exception Occured");
}
}
}
}
private void CommitTransaction()
{
using (TransactionScope ts = new TransactionScope())
{
// 3. Update IssueTrans table
IssueTran it = new IssueTran();
it.MemberID = Int32.Parse(txtBoxMemberID.Text);
it.BookID = txtBoxBookID.Text;
it.DateBorrow = dtpBorrow.Value.Date;
it.DateDue = dtpDue.Value.Date;
it.LoanStatus = "OUT";
it.Remarks = "NIL";
it.OverdueFine = 0;
it.FinePaymentStatus = "NA";
context.IssueTrans.Add(it);
//4. Update Member table : CurentNumberOnLoan
Member m = context.Members
.Where(x => x.MemberID.ToString() == txtBoxMemberID.Text)
.First();
int newNumberOnLoan = context
.Members
.Where(x => x.MemberID.ToString() == txtBoxMemberID.Text)
.Select(x => x.CurrentNumberOnLoan).First() + 1;
m.CurrentNumberOnLoan = newNumberOnLoan;
//5. Update Book Listing table: NumberLoaned ++
BookListing b = context.BookListings
.Where(x => x.BookID.ToString() == txtBoxBookID.Text)
.First();
b.NumberLoaned++;
//Commit Changes
context.SaveChanges();
ts.Complete();
}
}
