private void UpdateAvailableSupplier()//method to update new available supplier to current supplier for a specific row
{
//when update,only select one available supplier to update old one,available suppliers is same to add function
currentPS = ProductSupplierDB.GetAllSuppliersForSelectedProduct(currentUpdateProductId); //select all of suppliers for this current ProductID
List <Supplier> Suppliers = SupplierDB.GetAllsuppliers(); //access DB by select statement and return rows
var availableSupplierName = from allsupplier in Suppliers
where !(from c in currentPS select c.SupplierID).Contains(allsupplier.SupplierId) //select sullpiers which has no any relationship with current product
orderby allsupplier.SupName
select new { Supplierid = allsupplier.SupplierId, SupplierName = allsupplier.SupName };
cklstProductSupplier.DataSource = availableSupplierName.ToList();
cklstProductSupplier.DisplayMember = "SupplierName";
cklstProductSupplier.ValueMember = "Supplierid";
for (int i = 0; i < cklstProductSupplier.Items.Count; i++)
{
if (cklstProductSupplier.GetItemChecked(i))
{
cklstProductSupplier.SetItemChecked(i, false);
}
}
}
// public static List<ProductSupplier> currentPS = new List<ProductSupplier>();
public static List <ProductSupplier> getCurrentPS(int produtid, string OperationSign) //pass a specific productsupplier object into loadprosupplier function and return all rows with same productID
{
currentProdId = produtid; //get current selected product's productId in listbox of product(topleft)
return(ProductSupplierDB.GetAllSuppliersForSelectedProduct(currentProdId)); //get all rows where their productID is equal to current selected row's productID
}
//button function area
private void btnSave_Click(object sender, EventArgs e) //save action result
{
int count = this.cklstProductSupplier.Items.Count; //how many items is loaded in checkedlistbox
List <int> availSupplierID = new List <int>(); //declare current productid which is available
int j = 0;
for (int i = 0; i < count; i++)
{
if (this.cklstProductSupplier.GetItemChecked(i)) //tell whether item is selected of not
{
this.cklstProductSupplier.SetSelected(i, true); //if selected then set its selected value is ture
//MessageBox.Show(this.cklstProductSupplier.Text.ToString()); //获取文本
// MessageBox.Show(this.cklstProductSupplier.SelectedValue.ToString()); //获取Value值
availSupplierID.Add(Convert.ToInt32(cklstProductSupplier.SelectedValue)); //store all of selected item's value to availsupplierID list
j++;
}
}
if (OperationSign == "Add") //if custoemr click Add Button
{
if (j > 0) // you have selected at leat one item from checkedlistbox
{
int addsuccess = 1;
foreach (int p in availSupplierID)//get all of supplierd whic will be added to product
{
try
{
if (!ProductSupplierDB.AddProductsSuppliers(currentAddProductId, p))//currentAddProdID to locate a specific product and p is the supplier's id number
{
addsuccess = 0;
}
else
{
}
}
catch (Exception ex)
{
throw ex;
}
}
if (addsuccess == 1)
{
MessageBox.Show("You have added new suppliers succesfullly!");
lblSave.Text = "You have added " + j.ToString() + " new suppliers to product:" + currentAddProductName;
refreshLstProducts(); //refresh products list to display latest info
}
currentPS = ProductSupplierDB.GetAllSuppliersForSelectedProduct(currentAddProductId); //after Add operation,current selected product have more suppliers so reload currenPS list
dgvCurrentProSupplier.DataSource = currentPS; //refresh bottom grid
dgvCurrentProSupplier.Columns[1].Visible = false;
dgvCurrentProSupplier.Columns[2].Visible = false;
AddAvailableSupplier();//refrehs checkedlistbox and before do it ,must reassign values in currentPS list
}
else
{
MessageBox.Show("please Select at least one Prodcut as new item!");
}
btnSave.Enabled = false;
}
if (OperationSign == "Update") //when customer select Update operation
{
if (j > 0) //if select a target supplier to replace current supplier
{
DialogResult result = MessageBox.Show("Update product:" + currentUpdateProductName + ",replace " + currentUpdatesupplierName + " with " + cklstProductSupplier.Text + " ? ",
"Confirm Update", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (result == DialogResult.Yes)
{
try
{
if (!ProductSupplierDB.UpdateProductSupplier(availSupplierID[0], currentUpdatesupplierId, currentUpdateProductId))//update operation failed
{
MessageBox.Show("Another user has updated or deleted " +
"that customer.", "Database Error");
}
else//update operation successed!
{
MessageBox.Show("You have updated old supplier:" + currentUpdatesupplierName + " with new supplier " + cklstProductSupplier.Text + "successfully!");
lblSave.Text = "You have updated supplier:" + currentUpdatesupplierName + " with new suppliers :" + cklstProductSupplier.Text;
currentPS = ProductSupplierDB.GetAllSuppliersForSelectedProduct(currentUpdateProductId);//in david idea,delete excuted successfully
dgvCurrentProSupplier.DataSource = currentPS;
refreshLstProducts();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.GetType().ToString());
}
currentPS = ProductSupplierDB.GetAllSuppliersForSelectedProduct(currentUpdateProductId);
// MessageBox.Show(currentPS.Count().ToString());
dgvCurrentProSupplier.DataSource = currentPS;//
dgvCurrentProSupplier.Columns[1].Visible = false;
dgvCurrentProSupplier.Columns[2].Visible = false;
AddAvailableSupplier();
currentUpdateProductId = -1; //update saving has finished
btnSave.Enabled = false; //after update operation save is locked
}
}
else//if dont select any target supplier
{
MessageBox.Show("please Select one Prodcut !");
}
}
if (OperationSign == "Delete")//when click"delete"button
{
DialogResult result = MessageBox.Show("Delete product: " + currentDeleteProductName + " with supplier :" + currentDeleteSupplierName + " ? ",
"Confirm Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (result == DialogResult.Yes)
{
try
{
if (!ProductSupplierDB.DeleteProductSupplier(currentDeleteProductSupplierId)) //delete failure
{
MessageBox.Show("Please contact DataBase Administration ", "Database Error");
}
else //delete succussful
//currentProdId = currentPS[0].ProductID;
{
MessageBox.Show("Product: " + currentDeleteProductName + " with supplier :" + currentDeleteSupplierName + "has been deleted successfully!");
currentPS = ProductSupplierDB.GetAllSuppliersForSelectedProduct(currentDeleteProductId); //in david idea,delete excuted successfully
dgvCurrentProSupplier.DataSource = currentPS;
refreshLstProducts();
lblSave.Text = "You have deleted product:" + currentDeleteProductName + " with suplier:" + currentDeleteSupplierName;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.GetType().ToString());
}
currentDeleteProductId = -1;
btnSave.Enabled = false;//after update operation save is locked
}
}
//after any of above operation,we have to refresh top grid
allPS = ProductSupplierDB.GetAllProductsSuppliers();
btnAdd.Enabled = false;
btnDelete.Enabled = false;
btnUpdate.Enabled = false;
panel1.Visible = true;
panel2.Visible = false;
}
