/// <summary>
/// Inserts item to <see cref="DataGrid" />.
/// </summary>
/// <param name="index">The index.</param>
/// <returns>
/// Returns <c>true</c> if insertion is successful, <c>false</c> otherwise.
/// </returns>
public override bool InsertItem(int index)
{
var list = this.ItemsSource;
if (list == null)
{
return(false);
}
var itemType = TypeHelper.GetItemType(list);
var newList = Owner.CreateInstance(itemType) as IList;
var innerType = TypeHelper.GetInnerTypeOfList(list);
if (innerType == null)
{
return(false);
}
if (this.Owner.ItemsInRows)
{
if (newList != null)
{
for (var ii = 0; ii < this.Owner.Columns; ii++)
{
newList.Add(Owner.CreateInstance(innerType));
}
if (index < 0)
{
list.Add(newList);
}
else
{
list.Insert(index, newList);
}
}
}
else
{
// insert/append one new element to each list.
foreach (var row in list.OfType <IList>())
{
var newItem = Owner.CreateInstance(innerType);
if (index < 0)
{
row.Add(newItem);
}
else
{
row.Insert(index, newItem);
}
}
}
return(true);
}
/// <summary>
/// Generate column definitions based on a list of items.
/// </summary>
/// <param name="list">The list of items.</param>
/// <returns>A sequence of column definitions.</returns>
protected override IEnumerable <ColumnDefinition> GenerateColumnDefinitions(IList list)
{
var innerType = TypeHelper.GetInnerTypeOfList(list) ?? typeof(object);
var firstRow = list.Cast <IList>().FirstOrDefault();
var columns = firstRow?.Count ?? 0;
for (var ii = 0; ii < columns; ii++)
{
yield return
(new ColumnDefinition
{
Header = innerType.Name,
HorizontalAlignment = this.DefaultHorizontalAlignment,
Width = this.DefaultColumnWidth
});
}
}
/// <summary>
/// Generate column definitions based on <seealso cref="DataGridOperator.ItemsSource" />.
/// </summary>
/// <seealso cref="DataGridOperator.ItemsSource" />
public override void GenerateColumnDefinitions()
{
var list = this.ItemsSource;
var innerType = TypeHelper.GetInnerTypeOfList(list);
var firstRow = list.Cast <IList>().FirstOrDefault();
var columns = firstRow != null ? firstRow.Count : 0;
for (var ii = 0; ii < columns; ii++)
{
Owner.ColumnDefinitions.Add(
new ColumnDefinition
{
PropertyType = innerType ?? typeof(object),
Header = innerType != null ? innerType.Name : string.Empty,
HorizontalAlignment = Owner.DefaultHorizontalAlignment,
Width = Owner.DefaultColumnWidth
});
}
}
