/// <summary>
/// Renders the contents inside the control begin and end tags.
/// </summary>
protected override void RenderContents(IHtmlWriter writer, RenderContext context)
{
var dataSourceBinding = GetDataSourceBinding();
if (RenderOnServer)
{
// render on server
var index = 0;
foreach (var child in Children)
{
context.PathFragments.Push(dataSourceBinding.GetViewModelPathExpression(this, DataSourceProperty) + "[" + index + "]");
Children[index].Render(writer, context);
context.PathFragments.Pop();
index++;
}
}
else
{
// render on client
var placeholder = new DataItemContainer { DataContext = null };
placeholder.SetValue(Internal.IsDataContextBoundaryProperty, true);
Children.Add(placeholder);
ItemTemplate.BuildContent(context.RequestContext, placeholder);
context.PathFragments.Push(dataSourceBinding.GetViewModelPathExpression(this, DataSourceProperty) + "[$index]");
placeholder.Render(writer, context);
context.PathFragments.Pop();
}
}
/// <summary>
/// Performs the data-binding and builds the controls inside the <see cref="Repeater"/>.
/// </summary>
private void DataBind(RedwoodRequestContext context)
{
Children.Clear();
var dataSourceBinding = GetDataSourceBinding();
var dataSourcePath = dataSourceBinding.GetViewModelPathExpression(this, DataSourceProperty);
var index = 0;
var dataSource = DataSource;
if (dataSource != null)
{
foreach (var item in GetIEnumerableFromDataSource(dataSource))
{
var placeholder = new DataItemContainer { DataItemIndex = index };
placeholder.SetBinding(DataContextProperty, new ValueBindingExpression(dataSourcePath + "[" + index + "]"));
Children.Add(placeholder);
ItemTemplate.BuildContent(context, placeholder);
index++;
}
}
}
private void DataBind(RedwoodRequestContext context)
{
Children.Clear();
var dataSourceBinding = GetDataSourceBinding();
dataSourcePath = dataSourceBinding.GetViewModelPathExpression(this, DataSourceProperty);
var dataSource = DataSource;
string sortCommandPath = "";
if (dataSource is IGridViewDataSet)
{
sortCommandPath = dataSourcePath + ".SetSortExpression";
}
else
{
var sortCommandBinding = GetCommandBinding(SortChangedProperty);
if (sortCommandBinding != null)
{
sortCommandPath = sortCommandBinding.Expression;
}
}
var index = 0;
if (dataSource != null)
{
// create header row
CreateHeaderRow(context, sortCommandPath);
foreach (var item in GetIEnumerableFromDataSource(dataSource))
{
// create row
var placeholder = new DataItemContainer { DataItemIndex = index };
placeholder.SetBinding(DataContextProperty, new ValueBindingExpression(dataSourcePath + "[" + index + "]"));
Children.Add(placeholder);
CreateRow(context, placeholder);
index++;
}
}
}
protected override void RenderContents(IHtmlWriter writer, RenderContext context)
{
if (Children.Count == 0) return;
// render the header
Children[0].Render(writer, context);
// render body
var dataSourceBinding = GetDataSourceBinding();
if (!RenderOnServer)
{
var expression = dataSourceBinding.TranslateToClientScript(this, DataSourceProperty);
writer.AddKnockoutForeachDataBind(expression);
}
writer.RenderBeginTag("tbody");
// render contents
if (RenderOnServer)
{
// render on server
var index = 0;
foreach (var child in Children.Skip(1))
{
context.PathFragments.Push(dataSourceBinding.GetViewModelPathExpression(this, DataSourceProperty) + "[" + index + "]");
Children[index].Render(writer, context);
context.PathFragments.Pop();
index++;
}
}
else
{
// render on client
for (var i = Children.Count - 1; i > 0; i--)
{
Children.RemoveAt(i);
}
var placeholder = new DataItemContainer();
placeholder.SetValue(Internal.IsDataContextBoundaryProperty, true);
Children.Add(placeholder);
CreateRow(context.RequestContext, placeholder);
context.PathFragments.Push(dataSourceBinding.GetViewModelPathExpression(this, DataSourceProperty) + "[$index]");
placeholder.Render(writer, context);
context.PathFragments.Pop();
}
writer.RenderEndTag();
}
private void CreateRow(RedwoodRequestContext context, DataItemContainer placeholder)
{
var row = new HtmlGenericControl("tr");
RedwoodControl container = row;
foreach (var decorator in RowDecorators)
{
var decoratorInstance = decorator.Clone();
decoratorInstance.Children.Add(container);
container = decoratorInstance;
}
placeholder.Children.Add(container);
// create cells
foreach (var column in Columns)
{
var cell = new HtmlGenericControl("td");
SetCellAttributes(column, cell, false);
row.Children.Add(cell);
column.CreateControls(context, cell);
}
}
