private void btnNewStoreItem_Click(object sender, EventArgs e)
{
lbxSubCategories.Items.Clear();
lvwAvailableItems.Items.Clear();
NewStoreItem nsi = new NewStoreItem();
StoreItem item = new StoreItem();
StoreItems <StoreItem> items = new StoreItems <StoreItem>();
BinaryFormatter bfmStoreItem = new BinaryFormatter();
// This is the file that holds the list of items
string strFileName = @"C:\Microsoft Visual C# Application Design\Computer Accessories Store\StoreItems.slm";
if (nsi.ShowDialog() == DialogResult.OK)
{
// Make sure the user had selected a category
if (string.IsNullOrEmpty(nsi.cbxCategories.Text))
{
MessageBox.Show("You must specify the item's category.",
"Computer Accessories Store",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
// Make sure the user had entered a name/description
if (string.IsNullOrEmpty(nsi.txtItemName.Text))
{
MessageBox.Show("You must enter the name (or a " +
"short description) for the item.",
"Computer Accessories Store",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
// Make sure the user had typed a price for the item
if (string.IsNullOrEmpty(nsi.txtUnitPrice.Text))
{
MessageBox.Show("You must enter the price of the item.",
"Computer Accessories Store",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
// Before saving the new item, find out if there was
// already a file that holds the list of items
// If that file exists, open it and store its items
// in our StoreItems list
if (File.Exists(strFileName))
{
using (FileStream stmStoreItem = new FileStream(strFileName,
FileMode.Open,
FileAccess.Read,
FileShare.Read))
{
// Retrieve the list of items from file
items = (StoreItems <StoreItem>)bfmStoreItem.Deserialize(stmStoreItem);
}
}
// Create the accessory item
item.ItemNumber = nsi.txtItemNumber.Text;
item.Category = nsi.cbxCategories.Text;
item.SubCategory = nsi.cbxSubCategories.Text;
item.ItemName = nsi.txtItemName.Text;
item.UnitPrice = double.Parse(nsi.txtUnitPrice.Text);
// Call the Add method of our collection class to add the item
items.Add(item);
// Save the StoreItems collection
using (FileStream stmStoreItem = new FileStream(strFileName,
FileMode.Create,
FileAccess.Write,
FileShare.Write))
{
bfmStoreItem.Serialize(stmStoreItem, items);
}
}
InitializeStoreItems();
}
private void btnReplaceItem_Click(object sender, EventArgs e)
{
StoreItem selected = null;
StoreItem item = new StoreItem();
NewStoreItem nsi = new NewStoreItem();
BinaryFormatter bfmStoreItem = new BinaryFormatter();
StoreItems <StoreItem> items = new StoreItems <StoreItem>();
string strFileName = @"C:\Microsoft Visual C# Application Design\Computer Accessories Store\StoreItems.slm";
if (lvwAvailableItems.SelectedItems.Count == 0)
{
MessageBox.Show("No item is selected.",
"Computer Accessories Store",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
else
{
if (File.Exists(strFileName))
{
using (FileStream stmStoreItem = new FileStream(strFileName,
FileMode.Open,
FileAccess.Read,
FileShare.Read))
{
// Retrieve the list of items from file
items = (StoreItems <StoreItem>)bfmStoreItem.Deserialize(stmStoreItem);
foreach (StoreItem itm in items)
{
if (itm.ItemNumber == lvwAvailableItems.SelectedItems[0].Text)
{
selected = itm;
break;
}
}
}
}
if (nsi.ShowDialog() == DialogResult.OK)
{
// Make sure the user had selected a category
if (string.IsNullOrEmpty(nsi.cbxCategories.Text))
{
MessageBox.Show("You must specify the item's category.",
"Computer Accessories Store",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
// Make sure the user had entered a name/description
if (string.IsNullOrEmpty(nsi.txtItemName.Text))
{
MessageBox.Show("You must enter the name (or a " +
"short description) for the item.",
"Computer Accessories Store",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
// Make sure the user had typed a price for the item
if (string.IsNullOrEmpty(nsi.txtUnitPrice.Text))
{
MessageBox.Show("You must enter the price of the item.",
"Computer Accessories Store",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
// Create the item
item.ItemNumber = nsi.txtItemNumber.Text;
item.Category = nsi.cbxCategories.Text;
item.SubCategory = nsi.cbxSubCategories.Text;
item.ItemName = nsi.txtItemName.Text;
item.UnitPrice = double.Parse(nsi.txtUnitPrice.Text);
// Call the Add method of our collection class to replace the item
items.Replace(selected, item);
// Save the StoreItems collection
using (FileStream stmStoreItem = new FileStream(strFileName,
FileMode.Create,
FileAccess.Write,
FileShare.Write))
{
bfmStoreItem.Serialize(stmStoreItem, items);
}
}
}
InitializeStoreItems();
}