private void SetUpServerItem(IDotvvmRequestContext context, object item, int index, IValueBinding itemBinding, DataItemContainer container)
{
container.DataItemIndex = index;
container.SetDataContextForItem(itemBinding, index, item);
container.SetValue(Internal.PathFragmentProperty, GetPathFragmentExpression() + "/[" + index + "]");
container.ID = index.ToString();
}
private void DataBind(IDotvvmRequestContext context)
{
Children.Clear();
emptyDataContainer = null;
head = null;
var dataSourceBinding = GetDataSourceBinding();
var dataSource = DataSource;
if (dataSource is IRefreshableGridViewDataSet refreshableDataSet)
{
CallGridViewDataSetRequestRefresh(refreshableDataSet);
}
var sortCommand =
dataSource is ISortableGridViewDataSet sortableSet && sortableSet.SortingOptions is ISortingOptions sortOptions ?
expr => {
if (sortOptions.SortExpression == expr)
{
sortOptions.SortDescending ^= true;
}
else
{
sortOptions.SortExpression = expr;
sortOptions.SortDescending = false;
}
(sortableSet as IPageableGridViewDataSet)?.GoToFirstPage();
} :
SortChanged;
// WORKAROUND: DataSource is null => don't throw exception
if (sortCommand == null && dataSource == null)
{
sortCommand = s => {
throw new DotvvmControlException(this, "Cannot sort when DataSource is null.");
};
}
CreateHeaderRow(context, sortCommand);
var index = 0;
if (dataSource != null)
{
var itemBinding = GetItemBinding();
foreach (var item in GetIEnumerableFromDataSource())
{
// create row
var placeholder = new DataItemContainer {
DataItemIndex = index
};
placeholder.SetDataContextForItem(itemBinding, index, item);
placeholder.SetValue(Internal.PathFragmentProperty, GetPathFragmentExpression() + "/[" + index + "]");
placeholder.ID = index.ToString();
Children.Add(placeholder);
CreateRowWithCells(context, placeholder);
index++;
}
numberOfRows = index;
}
else
{
numberOfRows = 0;
}
// add empty item
if (EmptyDataTemplate != null)
{
emptyDataContainer = new EmptyData();
emptyDataContainer.SetValue(EmptyData.VisibleProperty, GetValueRaw(VisibleProperty));
emptyDataContainer.SetBinding(DataSourceProperty, dataSourceBinding);
EmptyDataTemplate.BuildContent(context, emptyDataContainer);
Children.Add(emptyDataContainer);
}
}