private void RenderDataNodes(HtmlTextWriter writer, IEnumerable dataItems, int depth, int index = 0, bool renderListTag = true)
{
if (dataItems == null || (dataItems is ICollection && ((ICollection)dataItems).Count < 1))
{
return;
}
if (Zongsoft.Common.TypeExtension.IsAssignableFrom(typeof(ICollection <>), dataItems.GetType()))
{
var property = dataItems.GetType().GetProperty("Count", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
if (property != null && Zongsoft.Common.Convert.ConvertValue <int>(property.GetValue(dataItems)) < 1)
{
return;
}
}
if (renderListTag)
{
var cssClass = this.ListCssClass ?? this.ListCssClass;
if (this.IsDropdown)
{
cssClass = Utility.ResolveCssClass(":menu", () => cssClass);
}
if (!string.IsNullOrWhiteSpace(cssClass))
{
writer.AddAttribute(HtmlTextWriterAttribute.Class, cssClass);
}
writer.RenderBeginTag(this.GetListTagName());
}
foreach (var dataItem in dataItems)
{
FormExtension.PushDataItem(this.Page, dataItem, index);
this.RenderNodeTemplate(writer, new TreeViewNodeContainer(this, dataItem, index++, this.GetItemTagName(), this.ItemCssClass)
{
Depth = depth,
});
FormExtension.PopDataItem(this.Page);
}
if (renderListTag)
{
writer.RenderEndTag();
}
}
private void RenderTableBody(HtmlTextWriter writer)
{
//生成表体标记(开始)
writer.RenderBeginTag(HtmlTextWriterTag.Tbody);
if (Utility.IsEmptyCollection(this.DataSource))
{
if (_emptyTemplate != null)
{
var tr = new System.Web.UI.HtmlControls.HtmlTableRow();
var td = new System.Web.UI.HtmlControls.HtmlTableCell()
{
ColSpan = this.Columns.Count,
};
tr.Controls.Add(td);
_emptyTemplate.InstantiateIn(td);
tr.RenderControl(writer);
}
}
else
{
IEnumerable dataSource = this.DataSource as IEnumerable;
if (dataSource == null)
{
this.GenerateRow(writer, this.DataSource, 1);
}
else
{
int index = 0;
foreach (var dataItem in dataSource)
{
FormExtension.PushDataItem(this.Page, dataItem, index);
this.GenerateRow(writer, dataItem, index++);
FormExtension.PopDataItem(this.Page);
}
}
}
//生成表体标记(结束)
writer.RenderEndTag();
}
protected override void RenderContent(HtmlTextWriter writer)
{
if (Utility.IsEmptyCollection(this.DataSource))
{
if (_emptyTemplate != null)
{
using (var literal = new Literal())
{
_emptyTemplate.InstantiateIn(literal);
literal.RenderControl(writer);
}
}
return;
}
IEnumerable dataItems = this.DataSource as IEnumerable;
if (dataItems == null || dataItems.GetType() == typeof(string))
{
var item = new DataItemContainer <ListView>(this, this.DataSource, 0);
this.RenderItem(writer, item);
}
else
{
int index = 0;
foreach (var dataItem in dataItems)
{
FormExtension.PushDataItem(this.Page, dataItem, index);
var item = new DataItemContainer <ListView>(this, dataItem, index++);
this.RenderItem(writer, item);
FormExtension.PopDataItem(this.Page);
}
}
}
