public async void ComboBox_Changed(object sender, EventArgs e)
{
// Try to make API call for selected Suppliers Object and display in Textbox. Else return
try
{
statusTextBlock.Text = "";
Suppliers selectedSupplier = (Suppliers)suppliersComboBox.SelectedItem;
int supplierID = supplierList.Find(p => p.SupplierId == selectedSupplier.SupplierId).SupplierId;
var supplier = await GetSupplier("https://travelexperts.azurewebsites.net/api/SuppliersAPI/" + supplierID.ToString());
var products = await GetProductsFromSupplier(selectedSupplier);
myListView.ItemsSource = products;
nameTextbox.Text = supplier.SupName;
}
catch (Exception)
{
return;
}
}
public async void addSubmit_ClickAsync(object sender, EventArgs e)
{
// Clear Status text when submit button is clicked
statusTextBlock.Text = "";
string supplierName = nameTextbox.Text;
// Validation: Name is required
if (nameTextbox.Text == "")
{
statusTextBlock.Foreground = Brushes.DarkOrange;
statusTextBlock.Text = "Missing Fields!!";
submitButton.Background = Brushes.DarkOrange;
return;
}
// Create new Supplier object from input field to post into database
var supplier = new Suppliers
{
SupName = nameTextbox.Text
};
// Get all selected products from ListView
List <Products> productsSelectedList = new List <Products>();
var selectedProducts = allListView.SelectedItems;
foreach (var item in selectedProducts)
{
productsSelectedList.Add((Products)item);
}
// Make Post API call to database to insert Supplier
var task = await PostSupplierAsync("https://travelexperts.azurewebsites.net/api/SuppliersAPI", supplier);
var items = task;
if (items != null)
{
// Add Products into ProductsSuppliers Table with newly added Supplier
int newSupplierID = items.SupplierId;
var productTask = await PostProductsForSupplierAsync(productsSelectedList, newSupplierID);
if (!productTask)
{
statusTextBlock.Foreground = Brushes.Red;
statusTextBlock.Text = "Something Went Wrong!";
submitButton.Background = Brushes.Red;
return;
}
// Successful insert of Supplier object into database
statusTextBlock.Foreground = Brushes.Green;
statusTextBlock.Text = "Supplier Created!";
submitButton.Background = Brushes.Green;
nameTextbox.Text = "";
}
else
{
// Post Request failed
statusTextBlock.Foreground = Brushes.Red;
statusTextBlock.Text = "Unable to Add Supplier!";
submitButton.Background = Brushes.Red;
}
}
private async Task <bool> ReplaceProductsSupplierAsync(List <Products> productsSelectedList, Suppliers supplier)
{
// Delete from ProductsSuppliers table the Add again
var deleteReturn = await DeleteProductsSuppliersAsync(supplier.SupplierId);
var postReturn = await PostProductsForSupplierAsync(productsSelectedList, supplier.SupplierId);
if (postReturn && deleteReturn)
{
return(true);
}
else
{
return(false);
}
}
