private DotvvmControl GetItem(IDotvvmRequestContext context, object item = null, int?index = null, bool allowMemoizationRetrive = false, bool allowMemoizationStore = false)
{
if (allowMemoizationRetrive && item != null && childrenCache.TryGetValue(item, out var container2) && container2.Parent == null)
{
Debug.Assert(item == container2.GetValueRaw(DataContextProperty));
SetUpServerItem(context, item, (int)index, container2);
return(container2);
}
var container = new DataItemContainer();
container.SetDataContextTypeFromDataSource(GetBinding(DataSourceProperty));
if (item == null && index == null)
{
SetUpClientItem(container);
}
else
{
SetUpServerItem(context, item, (int)index, container);
}
ItemTemplate.BuildContent(context, container);
// write it to the cache after the content is build. If it would be before that, exception could be suppressed
if (allowMemoizationStore && item != null)
{
// this GetValue call adds the value without raising exception when the value is already added...
childrenCache.GetValue(item, _ => container);
}
return(container);
}
private void DataBind(IDotvvmRequestContext context)
{
Children.Clear();
emptyDataContainer = null;
head = null;
var dataSourceBinding = GetDataSourceBinding();
var dataSource = DataSource;
var sortCommand = SortChanged;
sortCommand ??=
typeof(ISortableGridViewDataSet).IsAssignableFrom((GetBinding(DataSourceProperty) as IStaticValueBinding)?.ResultType)
? (Action <string?>)SortChangedCommand
: null;
sortCommand ??= s =>
throw new DotvvmControlException(this, "Cannot sort when DataSource is null.");
CreateHeaderRow(context, sortCommand);
var index = 0;
if (dataSource != null)
{
foreach (var item in GetIEnumerableFromDataSource() !)
{
// create row
var placeholder = new DataItemContainer {
DataItemIndex = index
};
placeholder.SetDataContextTypeFromDataSource(dataSourceBinding);
placeholder.DataContext = 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);
}
}
private DotvvmControl GetItem(IDotvvmRequestContext context, object item = null, int?index = null)
{
var container = new DataItemContainer();
container.SetDataContextTypeFromDataSource(GetBinding(DataSourceProperty));
if (item == null && index == null)
{
SetUpClientItem(container);
}
else
{
SetUpServerItem(context, item, (int)index, container);
}
ItemTemplate.BuildContent(context, container);
return(container);
}
protected override void RenderContents(IHtmlWriter writer, IDotvvmRequestContext context)
{
// render the header
head?.Render(writer, context);
// render body
if (!RenderOnServer)
{
writer.AddKnockoutForeachDataBind("dotvvm.evaluator.getDataSourceItems($gridViewDataSet)");
}
writer.RenderBeginTag("tbody");
// render contents
if (RenderOnServer)
{
// render on server
var index = 0;
foreach (var child in Children.Except(new[] { head, emptyDataContainer }))
{
child.Render(writer, context);
index++;
}
}
else
{
// render on client
if (InlineEditing)
{
var propertySerialization = context.Services
.GetRequiredService <IPropertySerialization>();
var primaryKeyProperty = ResolvePrimaryKeyProperty();
var primaryKeyPropertyName = propertySerialization.ResolveName(primaryKeyProperty);
var placeholder = new DataItemContainer {
DataContext = null
};
placeholder.SetDataContextTypeFromDataSource(GetBinding(DataSourceProperty));
placeholder.SetValue(Internal.PathFragmentProperty, GetPathFragmentExpression() + "/[$index]");
placeholder.SetValue(Internal.ClientIDFragmentProperty, GetValueRaw(Internal.CurrentIndexBindingProperty));
writer.WriteKnockoutDataBindComment("if", "ko.unwrap(ko.unwrap($gridViewDataSet).RowEditOptions().EditRowId) " +
$"!== ko.unwrap($data['{primaryKeyPropertyName}'])");
CreateTemplates(context, placeholder);
Children.Add(placeholder);
placeholder.Render(writer, context);
writer.WriteKnockoutDataBindEndComment();
var placeholderEdit = new DataItemContainer {
DataContext = null
};
placeholderEdit.SetDataContextTypeFromDataSource(GetBinding(DataSourceProperty));
placeholderEdit.SetValue(Internal.PathFragmentProperty, GetPathFragmentExpression() + "/[$index]");
placeholderEdit.SetValue(Internal.ClientIDFragmentProperty, GetValueRaw(Internal.CurrentIndexBindingProperty));
writer.WriteKnockoutDataBindComment("if", "ko.unwrap(ko.unwrap($gridViewDataSet).RowEditOptions().EditRowId) " +
$"=== ko.unwrap($data['{primaryKeyPropertyName}'])");
CreateTemplates(context, placeholderEdit, true);
Children.Add(placeholderEdit);
placeholderEdit.Render(writer, context);
writer.WriteKnockoutDataBindEndComment();
}
else
{
var placeholder = new DataItemContainer {
DataContext = null
};
placeholder.SetDataContextTypeFromDataSource(GetBinding(DataSourceProperty));
placeholder.SetValue(Internal.PathFragmentProperty, GetPathFragmentExpression() + "/[$index]");
placeholder.SetValue(Internal.ClientIDFragmentProperty, GetValueRaw(Internal.CurrentIndexBindingProperty));
Children.Add(placeholder);
CreateRowWithCells(context, placeholder);
placeholder.Render(writer, context);
}
}
writer.RenderEndTag();
}
private void DataBind(IDotvvmRequestContext context)
{
Children.Clear();
emptyDataContainer = null;
head = null;
var dataSourceBinding = GetDataSourceBinding();
var dataSource = DataSource;
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.SetDataContextTypeFromDataSource(dataSourceBinding);
placeholder.DataContext = 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);
}
}