Created forms to allow the management of ad items, suppliers and ad special keywords. Updated the database migration tool to include the ad special table. Cleaned up the main form's code and did a slight touch up of the interface.
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using System;
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using System.Data.Entity.Infrastructure;
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using System.Linq;
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using System.Transactions;
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using System.Windows.Forms;
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namespace AdvertsingProfitControl
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{
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public partial class FrmManageAdItems : Form
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{
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private bool _isUpdating;
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public FrmManageAdItems()
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{
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InitializeComponent();
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newItemTextBox.TextChanged += NewItemTextChanged;
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adItemsListView.ItemSelectionChanged += UpdateAdItemTextFields;
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var columnHeader = new ColumnHeader
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{
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Name = "AdItemHeaderColumn",
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Width = Width / 2
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};
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adItemsListView.Columns.Add(columnHeader);
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RefreshAdItemListing();
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}
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private void FilterValueChanged(object sender, EventArgs e)
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{
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if(filterComboBox.Enabled == false) return;
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adItemsListView.Columns[0].Text = @"Current Ad Items (" + (filterComboBox.SelectedItem.ToString() == "All" ? "No Filter" : @"Filter " + filterComboBox.SelectedItem) + @"):";
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adItemsListView.Items.Clear();
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var db = new AdvertisingProfitControlModel();
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var adItems = db.AdItems.Select(x => x);
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foreach (var adItem in adItems)
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{
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var item = new ListViewItem
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{
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Text = adItem.Name,
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Tag = adItem
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};
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if (string.Equals(filterComboBox.SelectedItem.ToString(), "All", StringComparison.Ordinal))
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{
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adItemsListView.Items.Add(item);
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continue;
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}
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if (string.Equals(filterComboBox.SelectedItem.ToString(), "0-9", StringComparison.Ordinal) && char.IsNumber(adItem.Name[0]))
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{
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adItemsListView.Items.Add(item);
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}
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else if (!string.Equals(filterComboBox.SelectedItem.ToString(), "0-9", StringComparison.Ordinal) && char.IsLetter(adItem.Name[0]))
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{
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if(filterComboBox.SelectedItem.ToString()[0] == adItem.Name[0])
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{ adItemsListView.Items.Add(item);}
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}
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}
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newItemTextBox.Text = string.Empty;
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descriptionTextBox.Text = string.Empty;
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removeAdItemButton.Enabled = false;
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}
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private void UpdateAdItemTextFields(object sender, ListViewItemSelectionChangedEventArgs e)
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{
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newItemTextBox.Text = ((AdItem)e.Item.Tag).Name;
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descriptionTextBox.Text = ((AdItem)e.Item.Tag).Description;
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_isUpdating = true;
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removeAdItemButton.Enabled = true;
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addUpdateItemButton.Text = @"Update Ad Item";
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newItemLabel.Text = @"Update Ad Item:";
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}
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private void NewItemTextChanged(object sender, EventArgs e)
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{
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if (_isUpdating && newItemTextBox.Text.Length == 0)
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{
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_isUpdating = false;
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descriptionTextBox.Text = string.Empty;
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addUpdateItemButton.Text = @"Register Ad Item";
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newItemLabel.Text = @"Register New Ad Item:";
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}
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addUpdateItemButton.Enabled = newItemTextBox.Text.Length > 0;
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}
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private void RefreshAdItemListing(string filter = "")
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{
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filterComboBox.SelectedIndexChanged -= FilterValueChanged;
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//Check to see if the current view is empty.
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if (adItemsListView.Items.Count == 0) filter = string.Empty;
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adItemsListView.Items.Clear();
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filterComboBox.Items.Clear();
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filterComboBox.Items.Add("All");
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var db = new AdvertisingProfitControlModel();
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var adItems = db.AdItems.Select(x => x).OrderBy(x => x.Name);
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var adItemCount = 0;
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var numberFound = false;
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foreach (var adItem in adItems)
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{
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var item = new ListViewItem
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{
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Text = adItem.Name,
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Tag = adItem
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};
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if (filter == string.Empty || filter == "All")
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{
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adItemsListView.Items.Add(item);
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}
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else if (adItem.Name[0].ToString() == filter)
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{
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adItemsListView.Items.Add(item);
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}
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else if (filter == "0-9" && char.IsNumber(adItem.Name[0]))
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{
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adItemsListView.Items.Add(item);
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}
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//Populate the filter.
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if (!filterComboBox.Items.Contains(adItem.Name[0].ToString()))
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{
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if (char.IsDigit(adItem.Name[0]) && !numberFound)
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{
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filterComboBox.Items.Add("0-9");
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numberFound = true;
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}
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else
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{
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filterComboBox.Items.Add(adItem.Name[0].ToString());
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}
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}
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adItemCount++;
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}
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if (adItemCount > 0)
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{
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filterComboBox.Enabled = true;
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filterComboBox.SelectedIndex = filterComboBox.Items.Contains(filter) ? filterComboBox.Items.IndexOf(filter) : 0;
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adItemsListView.Columns[0].Text = @"Current Ad Items (" + (filterComboBox.SelectedItem.ToString() == "All" ? "No Filter" : @"Filter " + filterComboBox.SelectedItem) + @"):";
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}
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else
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{
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adItemsListView.Columns[0].Text = @"No Ad Items to Display.";
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filterComboBox.SelectedIndex = 0;
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}
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removeAdItemButton.Enabled = false;
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newItemTextBox.Text = string.Empty;
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descriptionTextBox.Text = string.Empty;
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filterComboBox.SelectedIndexChanged += FilterValueChanged;
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}
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private void RemoveSelectedAdItem(object sender, EventArgs e)
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{
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var item = adItemsListView.SelectedItems[0];
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var oldAdItem = (AdItem)item.Tag;
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var db = new AdvertisingProfitControlModel();
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var adItemEntry = db.AdItems.Single(x => x.Id == oldAdItem.Id);
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//Check to see if the ad special is used by other tables.
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if (adItemEntry.ActualSales.Count > 0)
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{
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//If so, display a warning to the user about the potential data loss.
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var result =
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MessageBox.Show(
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adItemEntry.ActualSales.Count +
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@" reference(s) to this item found. Do you want to delete these records? This can not be undone.",
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@"References to " + oldAdItem.Name + @" Found", MessageBoxButtons.YesNoCancel,
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MessageBoxIcon.Question);
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if (result != DialogResult.Yes) return;
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//Perform the necessary operations to remove all references to the key word.
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using (var scope = new TransactionScope())
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{
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try
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{
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db.Projections.RemoveRange(db.Projections.Where(x => x.FkAdItemId == oldAdItem.Id));
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db.Inventories.RemoveRange(db.Inventories.Where(x => x.FkAdItemId == oldAdItem.Id));
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db.ActualSales.RemoveRange(db.ActualSales.Where(x => x.FkAdItemId == oldAdItem.Id));
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db.AdItems.Remove(adItemEntry);
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db.SaveChanges();
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scope.Complete();
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informationLabel.Text = @"Removed '" + Environment.NewLine + oldAdItem.Name +
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Environment.NewLine + @"' successfully.";
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adItemsListView.Items.RemoveAt(adItemsListView.SelectedItems[0].Index);
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}
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catch (DbUpdateException ex)
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{
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informationLabel.Text = @"Failed to remove " + Environment.NewLine + oldAdItem.Name + @"." +
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Environment.NewLine + ex.Message;
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}
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}
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}
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else
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{
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try
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{
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db.AdItems.Remove(adItemEntry);
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db.SaveChanges();
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informationLabel.Text = @"Removed '" + Environment.NewLine + oldAdItem.Name +
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Environment.NewLine + @"' successfully.";
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adItemsListView.Items.RemoveAt(adItemsListView.SelectedItems[0].Index);
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}
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catch (DbUpdateException ex)
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{
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informationLabel.Text = @"Failed to remove " + Environment.NewLine + oldAdItem.Name + @"." + Environment.NewLine + ex.Message;
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}
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}
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RefreshAdItemListing(filterComboBox.SelectedItem.ToString());
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}
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private void AddUpdateItem(object sender, EventArgs e)
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{
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var db = new AdvertisingProfitControlModel();
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if (!_isUpdating)
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{
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if (!db.AdItems.Any(x => x.Name == newItemTextBox.Text))
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{
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var adItem = new AdItem
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{
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Name = newItemTextBox.Text,
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Description = descriptionTextBox.Text
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};
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db.AdItems.Add(adItem);
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try
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{
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db.SaveChanges();
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informationLabel.Text = @"Registered '" + Environment.NewLine + adItem.Name + Environment.NewLine + @"' successfully.";
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}
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catch (DbUpdateException ex)
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{
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informationLabel.Text = @"Failed to register '" + Environment.NewLine + adItem.Name + @"'." + Environment.NewLine +
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ex.Message;
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}
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}
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else
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{
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MessageBox.Show(@"Ad item '" + newItemTextBox.Text + @"' already exists.",
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@"Duplicate Entry", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
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newItemTextBox.Text = string.Empty;
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}
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}
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else
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{
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var item = adItemsListView.SelectedItems[0];
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var index = ((AdItem)item.Tag).Id;
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var adItem = db.AdItems.SingleOrDefault(x => x.Id == index);
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if (adItem == null)
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{
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informationLabel.Text = @"Failed to retrieve " + Environment.NewLine + @"ad item ID.";
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return;
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}
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adItem.Name = newItemTextBox.Text;
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adItem.Description = descriptionTextBox.Text;
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db.SaveChanges();
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informationLabel.Text = @"Updated '" + Environment.NewLine + newItemTextBox.Text + Environment.NewLine + @"' successfully.";
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}
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RefreshAdItemListing(filterComboBox.SelectedItem.ToString());
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}
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}
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}
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