/// <summary>
/// Get an item from associated data source
/// </summary>
/// <param name="item">data source item</param>
/// <returns>AccessContextItem instance or null</returns>
internal AccessContextItem GetItemFromDataSource(RootItem item)
{
foreach (var listItem in Items)
{
if (listItem.Key.Item.DataSource == item)
{
return(listItem.Key.Item);
}
}
return(null);
}
/// <summary>
/// Try to get an AccessContextItem instance from associated data source
/// </summary>
/// <param name="item">data source item</param>
/// <returns>AccessContextItem instance or null</returns>
private AccessContextItem GetItemFromDataSource(RootItem item)
{
foreach (var listItem in this)
{
if (listItem.DataSource == item)
{
return(listItem);
}
}
return(null);
}
/// <summary>
/// Commit local changes to associated root table
/// </summary>
internal void ApplyLocalChanges()
{
foreach (var item in ItemManager.Items)
{
switch (item.Key.State)
{
case AccessContextListItemManager.ItemEntryState.New:
item.Key.Item.ItemState = AccessContextItemState.ItemIsNormal;
RootItem newItem = DataSource.AddNew();
foreach (var property in item.Key.Item.LocalChangedProperties)
{
newItem.SetValue(property.Key, property.Value);
}
item.Key.Item.DataSource = newItem;
// datenbank kommando
// dynmamischer code
break;
case AccessContextListItemManager.ItemEntryState.Deleted:
item.Key.Item.ItemState = AccessContextItemState.ItemIsDeleted;
DataSource.Remove(item.Key.Item.DataSource);
// datenbank kommando
// dynmamischer code
break;
case AccessContextListItemManager.ItemEntryState.Changed:
item.Key.Item.ItemState = AccessContextItemState.ItemIsNormal;
foreach (var property in item.Key.Item.LocalChangedProperties)
{
item.Key.Item.DataSource.SetValue(property.Key, property.Value);
}
// datenbank kommando
// dynmamischer code
break;
default:
throw new IndexOutOfRangeException();
}
}
Parent.Parent.UpdateNotifyOtherListInstances(this);
ItemManager.Clear();
}
private void buttonSimulateDatabaseAction_Click(object sender, EventArgs e)
{
DataLayer.RootList tableProducts = DataHost.Tables["Products"];
tableProducts[0].SetValue("Name", "ChangedName");
tableProducts.Remove(tableProducts[1]);
tableProducts.Remove(tableProducts[1]);
DataLayer.RootItem item1 = tableProducts.AddNew();
item1.SetValue("Name", "NewProduct1");
DataLayer.RootItem item2 = tableProducts.AddNew();
item2.SetValue("Name", "NewProduct2");
DataLayer.RootItem item3 = tableProducts.AddNew();
item3.SetValue("Name", "NewProduct3");
}
/// <summary>
/// Creates an instance of the class
/// </summary>
/// <param name="parent">parent list</param>
/// <param name="dataSource">origin item</param>
/// <param name="state">current state of the item</param>
public AccessContextItem(AccessContextList parent, RootItem dataSource, AccessContextItemState state)
{
Parent = parent;
DataSource = dataSource;
ItemState = state;
}
/// <summary>
/// Get an item from associated data source
/// </summary>
/// <param name="item">data source item</param>
/// <returns>AccessContextItem instance or null</returns>
internal AccessContextItem GetItemFromDataSource(RootItem item)
{
foreach (var listItem in Items)
{
if (listItem.Key.Item.DataSource == item)
return listItem.Key.Item;
}
return null;
}
/// <summary>
/// Creates an instance of the class
/// </summary>
/// <param name="parent">parent list</param>
/// <param name="dataSource">origin item</param>
/// <param name="state">current state of the item</param>
public AccessContextItem(AccessContextList parent, RootItem dataSource, AccessContextItemState state)
{
Parent = parent;
DataSource = dataSource;
ItemState = state;
}