private static String ViewFor(MvcTree model, Int32?hideDepth)
{
TagBuilder root = new TagBuilder("ul");
root.AddCssClass("mvc-tree-view");
return(Build(model, root, model.Nodes, 1, hideDepth).ToString());
}
public static MvcHtmlString TreeFor <TModel>(this HtmlHelper <TModel> html, Expression <Func <TModel, MvcTree> > expression, Int32?hideDepth = null, Boolean readOnly = false)
{
MvcTree model = ModelMetadata.FromLambdaExpression(expression, html.ViewData).Model as MvcTree;
String name = ExpressionHelper.GetExpressionText(expression) + ".SelectedIds";
TagBuilder tree = new TagBuilder("div");
tree.AddCssClass("mvc-tree");
tree.Attributes["data-for"] = name;
if (readOnly)
{
tree.Attributes["class"] += " mvc-tree-readonly";
}
tree.InnerHtml = IdsFor(name, model) + ViewFor(model, hideDepth);
return(new MvcHtmlString(tree.ToString()));
}
private static TagBuilder Build(MvcTree model, TagBuilder branch, List <MvcTreeNode> nodes, Int32?depth, Int32?hideDepth)
{
StringBuilder nodeBuilder = new StringBuilder();
foreach (MvcTreeNode node in nodes)
{
TagBuilder item = new TagBuilder("li");
item.InnerHtml = "<i></i>";
if (node.Id != null)
{
if (model.SelectedIds.Contains(node.Id.Value))
{
item.AddCssClass("mvc-tree-checked");
}
item.Attributes["data-id"] = node.Id.ToString();
}
TagBuilder anchor = new TagBuilder("a");
anchor.Attributes["href"] = "#";
anchor.InnerHtml += node.Title;
item.InnerHtml += anchor;
if (node.Children.Count > 0)
{
item.AddCssClass("mvc-tree-branch");
if (hideDepth <= depth)
{
item.AddCssClass("mvc-tree-collapsed");
}
item.InnerHtml += Build(model, new TagBuilder("ul"), node.Children, depth + 1, hideDepth).ToString();
}
nodeBuilder.Append(item);
}
branch.InnerHtml = nodeBuilder.ToString();
return(branch);
}
private static String IdsFor(String name, MvcTree model)
{
StringBuilder inputs = new StringBuilder();
TagBuilder input = new TagBuilder("input");
input.Attributes["type"] = "hidden";
input.Attributes["name"] = name;
foreach (Int32 id in model.SelectedIds)
{
input.Attributes["value"] = id.ToString();
inputs.Append(input.ToString(TagRenderMode.SelfClosing));
}
TagBuilder ids = new TagBuilder("div");
ids.InnerHtml = inputs.ToString();
ids.AddCssClass("mvc-tree-ids");
return(ids.ToString());
}
