private void DeleteSupplierProductToolStripMenuItem_Click(object sender, EventArgs e)
{
// get the key of the current product in the data grid view
int rowNum = productListGridView.CurrentCell.RowIndex;
Products_Supplier ps = ProductSupplierList[rowNum];
DialogResult answer = MessageBox.Show($"Are you sure you want to delete{ps.ProductSupplierId} ?",
"Confirmation Message", MessageBoxButtons.YesNo);
if (answer == DialogResult.Yes)
{
using (ProductSuppliersDataContext dbContext = new ProductSuppliersDataContext())
{
try
{
//Delete and update the grid view information
Products_Supplier currentProductSupplier = dbContext.Products_Suppliers.SingleOrDefault(x => x.ProductSupplierId == ps.ProductSupplierId);
dbContext.Products_Suppliers.DeleteOnSubmit(currentProductSupplier);
dbContext.SubmitChanges();
ProductSupplierList.RemoveAt(rowNum);
RefreshGridView();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.GetType().ToString());
}
}
}
}
private void AddSupplierButton_Click(object sender, EventArgs e)
{
if (isAdd)
{
if (
Validator.IsInt32(productIDTextbox) && Validator.IsNonNegativeInt(productIDTextbox) &&
Validator.IsInt32(supplierIDtextbox) && Validator.IsNonNegativeInt(supplierIDtextbox)
)
{
try
{
using (ProductSuppliersDataContext dbContext = new ProductSuppliersDataContext())
{
Products_Supplier newProduct_Supplier = new Products_Supplier // create product supplier using provided data
{
ProductId = int.Parse(productIDTextbox.Text),
SupplierId = int.Parse(supplierIDtextbox.Text)
};
// insert through data context object from the main form
dbContext.Products_Suppliers.InsertOnSubmit(newProduct_Supplier);
dbContext.SubmitChanges(); // submit to the database
currentProductSupplier = newProduct_Supplier;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.GetType().ToString());
return;
}
DialogResult = DialogResult.OK;
}
else // validation failed
{
return;
}
}
else // it is Modify
{
if (Validator.IsInt32(productIDTextbox) && Validator.IsNonNegativeInt(productIDTextbox) &&
Validator.IsInt32(supplierIDtextbox) && Validator.IsNonNegativeInt(supplierIDtextbox)
)
{
try
{
using (ProductSuppliersDataContext dbContext = new ProductSuppliersDataContext())
{
// get the product with Code from the current text box
Products_Supplier ps = dbContext.Products_Suppliers.Single(p => p.ProductSupplierId == int.Parse(productSupplierIDTextbox.Text));
//MessageBox.Show("Testing concurrency: update or delete current record from SSMS and click OK");
if (ps != null)
{
// make changes by copying values from text boxes
ps.ProductId = int.Parse(productIDTextbox.Text);
ps.SupplierId = int.Parse(supplierIDtextbox.Text);
//submit
dbContext.SubmitChanges();
DialogResult = DialogResult.OK;
}
}
}
catch (ChangeConflictException)
{
MessageBox.Show("Another user changed or deleted the current record", "Concurrency Exception");
return;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.GetType().ToString());
return;
}
}
else // validation failed
{
return;
}
}
}