//Adds new product to database
private void btnSubmitProd_Click(object sender, EventArgs e)
{
if (Validator.IsPresent("Product Name", prodNameTextBox))
{
Product newProduct = new Product
{
ProdName = prodNameTextBox.Text
};
using (travelexpertsDataContext db = new travelexpertsDataContext())
{
Product ExistingProduct = db.Products.SingleOrDefault(p => p.ProdName == newProduct.ProdName);
if (ExistingProduct != null)
{
MessageBox.Show("Product Already Exists");
}
else
{
db.Products.InsertOnSubmit(newProduct);
db.SubmitChanges();
DialogResult = DialogResult.OK;
MessageBox.Show("New product added");
}
}
}
}
//submits new supplier to database
private void btnSubmit_Click(object sender, EventArgs e)
{
if (Validator.IsPresent("Supplier Name", supplierAddTextBoc))
{
Supplier newSupplier = new Supplier
{
SupName = supplierAddTextBoc.Text
};
using (travelexpertsDataContext db = new travelexpertsDataContext())
{
Supplier existingSup = db.Suppliers.SingleOrDefault(s => s.SupName == newSupplier.SupName);
if (existingSup != null)
{
MessageBox.Show("Supplier already exists");//doesnt allow existing suppliers to be added
}
else
{
db.Suppliers.InsertOnSubmit(newSupplier);
db.SubmitChanges();
DialogResult = DialogResult.OK;
MessageBox.Show("New Supplier added");
}
}
}
}
// Takes current selected Product_Supplier and adds it to the package [Ronnie]
private void btnAdd_Click(object sender, EventArgs e)
{
// Get ProductSupplierID from combobox
int prodSupID = Convert.ToInt32(productSupplierIdTextBox.Text);
int packageID = currentPackage.PackageId;
// if the current product and supplier combination does not exist for the package, add it to the database
if (!TravelExpertsQueryManager.ExistPackagesProductsSupplier(packageID, prodSupID))
{
// Create a PackagesProductSupplier with that ID, and the Package ID from the current package
Packages_Products_Supplier newPackProdSup = new Packages_Products_Supplier
{
ProductSupplierId = prodSupID,
PackageId = packageID
};
// Add that PackagesProductsSupplier to the db
using (travelexpertsDataContext dbContext = new travelexpertsDataContext())
{
// insert through data context object from the main form
dbContext.Packages_Products_Suppliers.InsertOnSubmit(newPackProdSup);
dbContext.SubmitChanges(); // submit to the database
}
// Re-load the datagrid view
refreshDataGrid();
}
else
{
MessageBox.Show("The selected product and supplier portfolio has already been added to the package. Please try again.", "Input Error");
}
}
// Checks to ensure valid fields and then updates the current package entry in the database.
// Note: we insert a new Package with default properties when entering this form in add mode.
// As such, the save button functions the same in either mode. See Load and Cancel code for differences.
private void btnSave_Click(object sender, EventArgs e)
{
// VALIDATION [Ronnie]
if (Validator.IsPresent("Name", pkgNameTextBox) &&
Validator.IsPresent("Description", pkgDescTextBox) &&
Validator.IsPresent("Base Price", pkgBasePriceTextBox) &&
Validator.IsValidEndDate(pkgStartDateDateTimePicker, pkgEndDateDateTimePicker, ref tmpEndDate) &&
Validator.IsDecimal("Base Price", pkgBasePriceTextBox) &&
(pkgAgencyCommissionTextBox.Text == "" ||
(Validator.IsDecimal("Agency Commission", pkgAgencyCommissionTextBox) &&
Validator.IsNonNegativeDecimal("Agency Commission", pkgAgencyCommissionTextBox) &&
Validator.IsLEBasePrice(pkgBasePriceTextBox, pkgAgencyCommissionTextBox)
)) &&
Validator.IsNonNegativeDecimal("Base Price", pkgBasePriceTextBox)
)
{
try
{
using (travelexpertsDataContext db = new travelexpertsDataContext())
{
// get the product with Code from the current text box
Package packageFromDB = db.Packages.Single(p => p.PackageId == currentPackage.PackageId);
//MessageBox.Show("Testing concurrency: update or delete current record from SSMS and click OK");
if (packageFromDB != null)
{
// make changes by copying values from text boxes
packageFromDB.PkgName = pkgNameTextBox.Text;
packageFromDB.PkgStartDate = tmpStartDate;
packageFromDB.PkgEndDate = tmpEndDate;
packageFromDB.PkgDesc = pkgDescTextBox.Text;
packageFromDB.PkgBasePrice = Decimal.Parse(pkgBasePriceTextBox.Text, System.Globalization.NumberStyles.Currency);
//AgencyCommission can be null, so we check for that first
if (pkgAgencyCommissionTextBox.Text == "")
{
packageFromDB.PkgAgencyCommission = null;
}
// If not null, we have to parse it out of the formatted textbox
else
{
packageFromDB.PkgAgencyCommission = Decimal.Parse(pkgAgencyCommissionTextBox.Text, System.Globalization.NumberStyles.Currency);
}
// submit changes
db.SubmitChanges();
DialogResult = DialogResult.OK;
this.Close();
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.GetType().ToString());
}
}
}
//Delete from GridView so it won't add to database [Ronnie]
private void btnDelete_Click(object sender, EventArgs e)
{
// Grab data from selected cell on gridview
int rowNum = grdProdSup.CurrentCell.RowIndex; // index of the current row
int prodSuppID = Convert.ToInt32(grdProdSup[0, rowNum].Value); // Column for ProductSupplierID
using (travelexpertsDataContext dbContext = new travelexpertsDataContext())
{
//
Packages_Products_Supplier packProdSupForRemoval = (from match in dbContext.Packages_Products_Suppliers
where (match.ProductSupplierId == prodSuppID &&
match.PackageId == currentPackage.PackageId)
select match).Single();
dbContext.Packages_Products_Suppliers.DeleteOnSubmit(packProdSupForRemoval);
dbContext.SubmitChanges(); // submit to the database
}
refreshDataGrid();
}
//submits modified supplier to database
private void btnModify_Click(object sender, EventArgs e)
{
if (Validator.IsPresent("Supplier Name", supplierNameTextBox))
{
using (travelexpertsDataContext db = new travelexpertsDataContext())
{
Supplier supplierfrmDB = db.Suppliers.Single(p => p.SupplierId.ToString() == supplierIdTextBox.Text);
List <Supplier> ExistingSupplier = db.Suppliers.Where(q => q.SupName == supplierNameTextBox.Text).ToList();
if (ExistingSupplier.Count > 0 && ExistingSupplier[0].SupName != currentSupplier.SupName)
{
MessageBox.Show("Cannor modify Supplier because supplier name already exists");
}
else if (supplierNameTextBox.Text != supplierfrmDB.SupName)
{
supplierfrmDB.SupName = supplierNameTextBox.Text;
db.SubmitChanges();
DialogResult = DialogResult.OK;
MessageBox.Show("Supplier Modified");
}
}
}
}
//submits modified product to database
private void btnModify_Click(object sender, EventArgs e)
{
if (Validator.IsPresent("Product Name", prodNameTextBox))
{
using (travelexpertsDataContext db = new travelexpertsDataContext())
{
Product productFromDB = db.Products.Single(p => p.ProductId.ToString() == productIdTextBox.Text);
List <Product> ExistingProdut = db.Products.Where(q => q.ProdName == prodNameTextBox.Text).ToList();
if (ExistingProdut.Count > 0 && ExistingProdut[0].ProdName != currentProduct.ProdName)
{
MessageBox.Show("Cannot modify product because product already exists");
}
else if (prodNameTextBox.Text != productFromDB.ProdName)
{
productFromDB.ProdName = prodNameTextBox.Text;
db.SubmitChanges();
DialogResult = DialogResult.OK;
MessageBox.Show("Proudct modified");
}
}
}
}
//Adds new Packages to Database
private void btnAdd_Click(object sender, EventArgs e)
{
frmAddModify secondForm = new frmAddModify();
secondForm.isAdd = true;
// Because we give the user the option to add products to the new package before saving it,
// we need to do a preliminary insert into the database in order to get a valid PackageID
// for the PackageProductsSuppliers table.
// We don't use the current highest PackageID + 1, in order to avoid concurrency issues.
// These alterations done by [Eric]
Package newPackage = new Package
{
PkgName = "DEFAULT",
PkgStartDate = DateTime.Now,
PkgEndDate = DateTime.Now,
PkgDesc = "DEFAULT",
PkgBasePrice = 0,
PkgAgencyCommission = 0
};
// submit changes to database
using (travelexpertsDataContext db = new travelexpertsDataContext())
{
db.Packages.InsertOnSubmit(newPackage); // insert the new package through data context object
db.SubmitChanges(); //submit to database
}
secondForm.currentPackage = newPackage; // Now that the new package has been added to the database, the Object has an Id (magic!)
DialogResult result = secondForm.ShowDialog(); // display second form modal
if (result == DialogResult.OK) // new row got inserted
{
secondForm.Close();
RefreshView();
}
}
// Go back to last page without saving changes. This may involve some cleaning up, depending on the mode and if products were added [Eric]
private void btnCancel_Click(object sender, EventArgs e)
{
using (travelexpertsDataContext dbContext = new travelexpertsDataContext())
{
// First, we have to check to see if any products were added to the package before cancelling
if (didAddProducts) // this will be true if so - no need to spend time querying the db
{
// Get the current PPS entries in the database corresponsind to this package
List <Packages_Products_Supplier> ppsCurrent =
TravelExpertsQueryManager.GetPackagesProductsSuppliersByPackageID(currentPackage.PackageId);
// Next, we have to get the PPS entries to re-add (if they were deleted) and/or remove (if new ones were added)
// This is not a super efficient process, but packages shouldn't have enough products for it to make much difference
// First, get the ones to re-add
List <Packages_Products_Supplier> ppsToAdd = ppsSnapshot // Creating a list of Package_Product_Suppliers where...
.Where(ppsSnap => !ppsCurrent // ...for each snapshot entry, it is NOT the case that...
.Any(ppsCurr => ppsCurr.ProductSupplierId == ppsSnap.ProductSupplierId)) // ...any current entry has that snapshot entry's ProductSupplierID
.ToList();
// Next, the ones to remove
List <Packages_Products_Supplier> ppsToDelete = ppsCurrent // Creating a list of Package_Product_Suppliers where...
.Where(ppsCurr => !ppsSnapshot // ...for each current entry, it is NOT the case that...
.Any(ppsSnap => ppsCurr.ProductSupplierId == ppsSnap.ProductSupplierId)) // ...any snapshot entry has that current entry's ProductSupplierID
.ToList();
// Add the needed entries back
foreach (Packages_Products_Supplier ppsA in ppsToAdd)
{
// LINQ to SQL doesn't let you re-add old entity objects, so we need to create copies to add back in place
Packages_Products_Supplier clone = new Packages_Products_Supplier
{
PackageId = ppsA.PackageId,
ProductSupplierId = ppsA.ProductSupplierId
};
dbContext.Packages_Products_Suppliers.InsertOnSubmit(clone);
}
// Delete the entries to undo
foreach (Packages_Products_Supplier ppsD in ppsToDelete)
{
// Deleting only works on entities from the current context, so need to grab them
// I'm sure this could be done in the ones-to-remove LINQ query above, but I couldn't manage it
Packages_Products_Supplier deleteTarget = dbContext.Packages_Products_Suppliers // Search in the table...
.Single(pps => // ...for the one entry, with...
pps.ProductSupplierId == ppsD.ProductSupplierId && //...the matching ProductSupplierID...
pps.PackageId == ppsD.PackageId); //... and the matching PackageID
dbContext.Packages_Products_Suppliers.DeleteOnSubmit(deleteTarget);
}
// Save changes. Phew!
dbContext.SubmitChanges();
}
// One more step if in Add mode.
// A package was inserted into the database initially (to get the add products half to work).
// So, if cancelling, we want to delete it this created package.
if (isAdd)
{
// Delete package
Package packToDelete = dbContext.Packages
.Single(p => p.PackageId == currentPackage.PackageId);
dbContext.Packages.DeleteOnSubmit(packToDelete);
dbContext.SubmitChanges(); // submit to the database
}
}
// Exit the form
DialogResult = DialogResult.Cancel;
this.Close();
}
// Modifies the ProductSupplier associated with the selected row of the datagrid using the user inputs [Eric]
private void btnModifyProdSupp_Click(object sender, EventArgs e)
{
// Get user inputs
int newProdId = Convert.ToInt32(productIdComboBox.SelectedValue);
int newSupID = Convert.ToInt32(supplierIdComboBox.SelectedValue);
// The user may not have selected a value for the supplierIDComboBox yet, if so, they want the visible (top) one
if (newSupID == 0)
{
supplierIdComboBox.SelectedIndex = 0;
newSupID = Convert.ToInt32(supplierIdComboBox.SelectedValue);
}
// grab data from dropdown selectedvalues & hidden id field (productSupplierIdTextBox)
using (travelexpertsDataContext db = new travelexpertsDataContext())
{
if (addMode == false) // if modifying
{
// Get current product supplier ID
int prodSupID = Convert.ToInt32(productSupplierIdTextBox.Text);
// Grab the current entry from the database
Products_Supplier prodSup = db.Products_Suppliers
.Single(ps => ps.ProductSupplierId == prodSupID);
// Validate by ensuring this unique combination isn't in the database
Products_Supplier matchingProps = Validator.prodSupComboAlreadyExists(db, newProdId, newSupID, prodSupID);
if (matchingProps == null)
{
// Update with inputted values
prodSup.ProductId = newProdId;
prodSup.SupplierId = newSupID;
db.SubmitChanges();
}
else // there is a match for the product/supplier combo
{
//Give the user the option to change to this combination anyway (this will move all associated packages to the matching Product_Supplier)
DialogResult result = MessageBox.Show($"That product/supplier combination already exists (ID #{matchingProps.ProductSupplierId} - {matchingProps.Product.ProdName} - {matchingProps.Supplier.SupName}). Would you like to change any associated packages to have the selected product?",
"Existing Product/Supplier", MessageBoxButtons.YesNo);
if (result == DialogResult.Yes)
{
// Get all Package_Product_Suppliers entries that refer to the current ProdSup ID (these will need to be modified)
List <Packages_Products_Supplier> ppsWithCurrentProdSupID = db.Packages_Products_Suppliers.Where(pps => pps.ProductSupplierId == prodSupID).ToList();
// Go through each, updating the ProdSupID to the existing combination
foreach (Packages_Products_Supplier pps in ppsWithCurrentProdSupID)
{
// We can't directly update ProdSupID in an existing entry as it is part of the entry's Primary key.
//Instead, we have to delete it and create a new one.
int currentPackageId = pps.PackageId; // to keep track of the package ID
db.Packages_Products_Suppliers.DeleteOnSubmit(pps);
db.SubmitChanges(); // have to submit changes here otherwise we can't create a new one
try
{
using (travelexpertsDataContext db2 = new travelexpertsDataContext())
{
// Now, create a new PPS using the PPS and the new ProdSupID
Packages_Products_Supplier newPps = new Packages_Products_Supplier
{
PackageId = currentPackageId, // the same package id
ProductSupplierId = matchingProps.ProductSupplierId // the prod_sup id that matches what the user wants to change it to
};
db2.Packages_Products_Suppliers.InsertOnSubmit(newPps);
db2.SubmitChanges();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.GetType().ToString());
}
}
MessageBox.Show($"Any associated packages successfully transffered to ID# {matchingProps.ProductSupplierId} - {matchingProps.Product.ProdName} - {matchingProps.Supplier.SupName})");
}
}
// Reload data
checkboxFilterProducts_CheckedChanged(sender, e);//this updates the main datagrid based on whether the filter is on
RefreshPackagesByProdSuppGrid();
RefreshProdSupId();
} // end modify
else // if in add mode
{
// Validate to ensure the combo is new
Products_Supplier match = Validator.prodSupComboAlreadyExists(db, newProdId, newSupID);
if (match == null) //if new
{
// create a new Product_Supplier with the data
Products_Supplier newProdSup = new Products_Supplier
{
ProductId = newProdId,
SupplierId = newSupID
};
// insert into db and save
db.Products_Suppliers.InsertOnSubmit(newProdSup);
db.SubmitChanges();
// Re-enable Add new button
btnAddProdSupp.Enabled = true;
// Reload main data
checkboxFilterProducts_CheckedChanged(sender, e); //updates main datagrid based on status of filter checkbox
// Go to the new entry in the gridview
checkboxFilterProducts.Checked = false; // uncheck filter so new product can be seen
int lastIndex = grdProductSuppliers.Rows.Count - 1; // get last row of the grid
grdProductSuppliers.Rows[lastIndex].Selected = true; // select it
grdProductSuppliers.FirstDisplayedScrollingRowIndex = lastIndex; // go down to it
grdProductSuppliers_CellClick(sender, new DataGridViewCellEventArgs(1, lastIndex));
// Reload related data
RefreshPackagesByProdSuppGrid();
productIdComboBox_SelectedIndexChanged(sender, e);
RefreshProdSupId();
}
else // if the combo already exists
{
// Alert the user
MessageBox.Show($"That product/supplier combination already exists (ID #{match.ProductSupplierId}).");
}
}
}
}
