private void dgvOrderBook_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{
string columnName = this.dgvOrderBook.Columns[e.ColumnIndex].Name;
int temp = -1;
if (columnName.Equals("Quantity"))
{
if (string.IsNullOrEmpty(e.FormattedValue.ToString()))
{
this.dgvOrderBook.Rows[e.RowIndex].ErrorText = "Quantity could not be empty.";
e.Cancel = true;
}
else
{
bool check = false;
try
{
temp = int.Parse(e.FormattedValue.ToString());
}
catch (Exception)
{
}
if (temp > 0)
{
int current = dgvOrderBook.CurrentCell.RowIndex;
int ID = int.Parse(dgvOrderBook.Rows[current].Cells["ID"].Value.ToString());
DataRow[] rows = datatable.Select("ID =" + ID);
int maxQuantity = int.Parse(rows[0]["Quantity"].ToString());
if (temp <= maxQuantity)
{
BookOrderObj re = OrderList.SingleOrDefault(o => o.ID == ID);
if (re != null)
{
check = true;
re.Quantity = temp;
double TotalPrice = 0;
foreach (var item in OrderList)
{
TotalPrice += (item.Price * item.Quantity);
}
lblTotal.Text = "Total: " + TotalPrice + " $";
}
}
}
if (check == false)
{
this.dgvOrderBook.Rows[e.RowIndex].ErrorText = "Quantity only number and small than available book quantity.";
e.Cancel = true;
}
}
}
}
private void dgvBook_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
if (e.RowIndex >= 0)
{
int ID = int.Parse(dgvBook.Rows[e.RowIndex].Cells["ID"].Value.ToString());
string ISBN = dgvBook.Rows[e.RowIndex].Cells["ISBN"].Value.ToString();
string Name = dgvBook.Rows[e.RowIndex].Cells["Name"].Value.ToString();
int MaxQuantity = int.Parse(dgvBook.Rows[e.RowIndex].Cells["Quantity"].Value.ToString());
double Price = float.Parse(dgvBook.Rows[e.RowIndex].Cells["Price"].Value.ToString());
int OrderQuantity = 1;
BookOrderObj re = OrderList.SingleOrDefault(o => o.ID == ID);
if (re != null)
{
if (MaxQuantity == re.Quantity)
{
MessageBox.Show("You can add more quantity.");
return;
}
OrderQuantity = re.Quantity + 1;
re.Quantity = OrderQuantity;
}
else
{
OrderList.Add(new BookOrderObj
{
ID = ID,
ISBN = ISBN,
Name = Name,
Quantity = 1,
Price = Price
});
}
var bindingList = new BindingList <BookOrderObj>(OrderList);
dynamic source = new BindingSource(bindingList, null);
double TotalPrice = 0;
foreach (var item in OrderList)
{
TotalPrice += (item.Price * item.Quantity);
}
lblTotal.Text = "Total: " + TotalPrice + " $";
dgvOrderBook.DataSource = source;
}
else
{
return;
}
}
private void button1_Click(object sender, EventArgs e)
{
if (dgvOrderBook.Rows.Count <= 0)
{
MessageBox.Show("Please choose one item.");
return;
}
int current = dgvOrderBook.CurrentCell.RowIndex;
if (current >= 0)
{
int ID = int.Parse(dgvOrderBook.Rows[current].Cells["ID"].Value.ToString());
DialogResult r = MessageBox.Show("Do you want delete this items?", "Confirm Delete", MessageBoxButtons.YesNo);
if (r == DialogResult.Yes)
{
BookOrderObj re = OrderList.SingleOrDefault(o => o.ID == ID);
if (re != null)
{
OrderList.Remove(re);
}
else
{
return;
}
}
var bindingList = new BindingList <BookOrderObj>(OrderList);
dynamic source = new BindingSource(bindingList, null);
dgvOrderBook.DataSource = source;
double TotalPrice = 0;
foreach (var item in OrderList)
{
TotalPrice += (item.Price * item.Quantity);
}
lblTotal.Text = "Total: " + TotalPrice + " $";
dgvOrderBook.DataSource = source;
}
else
{
return;
}
}