private void button1_Click(object sender, EventArgs e)
{
textBox2.Clear();
try
{
dt.Rows.Clear();
int memberid = int.Parse(textBox1.Text);
MembersDetail mb = ctx.MembersDetails.Single(x => x.MemberID == memberid);
if (mb == null)
{
toolStripStatusLabel1.Text = "Invalid ID";
}
else
{
textBox2.Text = mb.MemberName;
}
var transactionInfos = ctx.LoanRecords.Where(x => x.MemberID.ToString() == textBox1.Text)
.Select(x => new { TransactionID = x.TransactionID, DateIssue = x.DateIssue, DateDue = x.DateDue }).ToList();
foreach (var info in transactionInfos)
{
var bookIDs = ctx.LoanTransDetails.Where(x => x.TransactionID == info.TransactionID && x.LoanStatus == "out").Select(x => x.BookID).ToList();
var books = ctx.BooksDetails.Where(x => bookIDs.Contains(x.BookID)).Select(x => new { BookID = x.BookID, BookTitle = x.BookTitle, Author = x.Author, BookType = x.BookType });
foreach (var b in books)
{
DataRow r = dt.NewRow();
r["TransactionID"] = info.TransactionID;
r["BookID"] = b.BookID;
r["BookTitle"] = b.BookTitle;
r["Author"] = b.Author;
r["BookType"] = b.BookType;
r["DateIssue"] = info.DateIssue;
r["DateDue"] = info.DateDue;
dt.Rows.Add(r);
}
}
dataGridView1.DataSource = dt;
if (dataGridView1.RowCount == 0) //for members who have no books to return currently
{
toolStripStatusLabel1.Text = "There is no book pending return currently.";
}
else
{
toolStripStatusLabel1.Text = "Please select one or more books to return."; //clear message if members have books to return
}
}
catch (Exception obj)
{
toolStripStatusLabel1.Text = "Please input the correct MemberID";
textBox2.Text = "";
}
}
private void buttonDelete_Click(object sender, EventArgs e)
{
int CurRec = posn;
MembersDetail m = memberLst[CurRec];
ctx.MembersDetails.Remove(m);
ctx.SaveChanges();
if (posn > 0)
{
posn--;
}
PopulateText(posn);
}
private void txtMemberID_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
try
{
if (e.KeyData == Keys.Tab)
{
MembersDetail md = ctx.MembersDetails.Where(x => x.MemberID.ToString() == txtMemberID.Text).First();
txtMemberName.Text = md.MemberName;
}
}
catch (InvalidOperationException)
{
txtBookTitle.Text = "";
toolStripLabel1.Text = "Please enter a valid Member ID before pressing tab";
}
}
private void buttonAdd_Click(object sender, EventArgs e)
{
MembersDetail m = new MembersDetail();
txtMemberID.Text = Convert.ToString(" ");
txtMemberName.Text = " ";
dtpBirthDate.Format = DateTimePickerFormat.Custom;
dtpBirthDate.CustomFormat = " ";
txtEmailAddress.Text = "";
txtAddress.Text = "";
txtPostalCode.Text = "";
txtPhoneNumber.Text = "";
memberLst.Add(m);
ctx.MembersDetails.Add(m);
posn = memberLst.Count - 1;
PopulateText(posn);
dtpBirthDate.Format = DateTimePickerFormat.Long;
}
private void buttonFind_Click(object sender, EventArgs e)
{
int id = Convert.ToInt32(txtFind.Text);
MembersDetail md = memberLst.SingleOrDefault(m => m.MemberID == id);
if (memberLst.SingleOrDefault(m => m.MemberID == id) == null)
{
toolStripLabel.Text = "No records exists in table";
}
else
{
for (int i = 0; i < memberLst.Count; i++)
{
if (txtFind.Text == memberLst[i].MemberID.ToString())
{
posn = i;
toolStripLabel.Text = "Records: " + posn;
break;
}
PopulateText(posn);
}
}
}
