public TreeViewNodeRenderEventArgs(TreeViewNode node, object dataItem)
{
if(node == null)
throw new ArgumentNullException("node");
_node = node;
_dataItem = dataItem;
}
public TreeViewNode(string name, string text, string url)
{
if(string.IsNullOrWhiteSpace(name))
throw new ArgumentNullException("name");
if(name.Contains("/"))
{
if(name.Length == 1)
name = "@";
else
throw new ArgumentException();
}
_name = name.Trim();
_text = text ?? string.Empty;
_navigateUrl = url ?? string.Empty;
_toolTip = string.Empty;
_description = string.Empty;
_fullPath = string.Empty;
_selected = false;
_visible = true;
_parent = null;
_cssClass = "item";
}
private void RenderNode(HtmlTextWriter writer, TreeViewNode node, int depth, int index = 0)
{
if (node == null || (!node.Visible))
{
return;
}
string cssClass = node.CssClass ?? this.ItemCssClass;
if (!string.IsNullOrWhiteSpace(node.Name))
{
writer.AddAttribute(HtmlTextWriterAttribute.Id, node.Name);
}
if (node.Selected)
{
cssClass = Utility.ResolveCssClass(":selected", () => cssClass);
}
if (this.IsDropdown && node.Nodes.Count > 0)
{
cssClass = Utility.ResolveCssClass(":ui dropdown", () => cssClass);
}
if (!string.IsNullOrWhiteSpace(cssClass))
{
writer.AddAttribute(HtmlTextWriterAttribute.Class, cssClass);
}
writer.RenderBeginTag(this.GetItemTagName());
if (!string.IsNullOrWhiteSpace(node.NavigateUrl))
{
if (!string.IsNullOrWhiteSpace(node.NavigateCssClass))
{
writer.AddAttribute(HtmlTextWriterAttribute.Class, node.NavigateCssClass);
}
writer.AddAttribute(HtmlTextWriterAttribute.Href, node.NavigateUrl == "#" ? Utility.EmptyLink : node.NavigateUrl);
writer.RenderBeginTag(HtmlTextWriterTag.A);
}
if (node.Image != null)
{
node.Image.ToHtmlString(writer);
}
writer.WriteEncodedText(node.Text);
if (!string.IsNullOrWhiteSpace(node.NavigateUrl))
{
writer.RenderEndTag();
}
if (node.Nodes.Count > 0)
{
cssClass = node.ListCssClass;
if (this.IsDropdown)
{
cssClass = Utility.ResolveCssClass(":menu", () => cssClass);
}
if (!string.IsNullOrWhiteSpace(cssClass))
{
writer.AddAttribute(HtmlTextWriterAttribute.Class, cssClass);
}
writer.RenderBeginTag(this.GetListTagName());
int childIndex = 0;
foreach (var child in node.Nodes)
{
this.RenderNode(writer,
child,
depth + 1, childIndex++);
}
writer.RenderEndTag();
//添加下拉箭头图标
writer.AddAttribute(HtmlTextWriterAttribute.Class, "icon dropdown");
writer.RenderBeginTag(HtmlTextWriterTag.I);
writer.RenderEndTag();
}
if (!string.IsNullOrWhiteSpace(this.LoadingPath) && string.Equals(this.LoadingPath, node.FullPath, StringComparison.OrdinalIgnoreCase))
{
this.RenderDataNodes(writer, this.DataSource as IEnumerable, depth, index, true);
}
writer.RenderEndTag();
}
public TreeViewNodeRenderEventArgs(TreeViewNode node) : this(node, null)
{
}
public TreeViewNodeRenderEventArgs(TreeViewNode node) : this(node, null)
{
}