public static string Display(string cssClassOverride = "breadcrumb")
{
var state = StateManager.GetState(SessionProvider.SessionId);
if (state.Crumbs != null && !state.Crumbs.Any())
{
return("<!-- BreadCrumbs stack is empty -->");
}
StringBuilder sb = new StringBuilder();
sb.Append("<ol class=\"");
sb.Append(cssClassOverride);
sb.Append("\">");
state.Crumbs.Select(x => new { Entry = x, IsCurrent = IsCurrentPage(x.Key) }).OrderBy(x => x.IsCurrent).ToList().ForEach(x =>
{
string label = string.IsNullOrWhiteSpace(x.Entry.Label) ? x.Entry.Action : x.Entry.Label;
if (x.IsCurrent)
{
sb.Append("<li class='active'>" + label + "</li>");
}
else
{
sb.Append("<li><a href=\"" + x.Entry.Url + "\">" + label + "</a></li>");
}
});
sb.Append("</ol>");
return(sb.ToString());
}
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
if (filterContext.IsChildAction)
{
return;
}
if (filterContext.HttpContext.Request.HttpMethod != "GET")
{
return;
}
if (Clear)
{
StateManager.RemoveState(SessionProvider.SessionId);
}
if (Manual)
{
return;
}
var state = StateManager.GetState(SessionProvider.SessionId);
state.Push(filterContext, Label, ResourceType);
}
public static string Display()
{
var state = StateManager.GetState(SessionProvider.SessionId);
if (state.Crumbs != null && !state.Crumbs.Any())
{
return("<!-- BreadCrumbs stack is empty -->");
}
StringBuilder sb = new StringBuilder();
sb.Append("<ol class=\"breadcrumb\">");
state.Crumbs.ForEach(x =>
{
if (IsCurrentPage(x.Key))
{
sb.Append("<li class='active'>" + x.Label + "</li>");
}
else
{
sb.Append("<li><a href=\"" + x.Url + "\">" + x.Label + "</a></li>");
}
});
sb.Append("</ol>");
return(sb.ToString());
}
/// <summary>
/// Get the currently active URL from the BreadCrumb
/// </summary>
/// <returns>The currently active URL from the BreadCrumb</returns>
public static string GetCurrentUrl()
{
var state = StateManager.GetState(SessionProvider.SessionId);
if (state.Current != null)
{
return(state.Current.Url);
}
return(state.Crumbs.LastOrDefault()?.Url); // We can probably assume the last entry is the current entry
}
public override void OnResultExecuted(ResultExecutedContext filterContext)
{
if (filterContext.Exception != null)
{
//if we have an exception on the result (for ANY reason), let's make sure that we don't
//track this failing page on the breadcrumb
var state = StateManager.GetState(SessionProvider.SessionId);
state.OnErrorRemoveCrumb(filterContext);
}
base.OnResultExecuted(filterContext);
}
public static string DisplayRaw()
{
var state = StateManager.GetState(SessionProvider.SessionId);
if (state.Crumbs != null && !state.Crumbs.Any())
{
return("<!-- BreadCrumbs stack is empty -->");
}
return(string.Join(" > ",
state.Crumbs.Select(x => "<a href=\"" + x.Url + "\">" + x.Label + "</a>").ToArray()));
}
/// <summary>
/// Get the URL of the preceeding item from the BreadCrumb
/// </summary>
/// <returns>The URL of the preceeding item in the breadcrumb</returns>
public static string GetPreviousUrl()
{
var previousPage = StateManager.GetState(SessionProvider.SessionId).Crumbs;
var updatedList = new SortedSet <StateEntry>(previousPage, new StateEntryComparer());
updatedList.Reverse();
if (updatedList.Count > 1)
{
return(updatedList.Skip(1).First().Url);
}
return(null);
}
public static void Add(string url, string label)
{
// get a key for the Url.
var key =
url
.ToLower()
.GetHashCode();
var current = new StateEntry().WithKey(key)
.WithUrl(url)
.WithLabel(label);
StateManager.GetState(SessionProvider.SessionId).Crumbs.Add(current);
}
public static string DisplayRaw()
{
var state = StateManager.GetState(SessionProvider.SessionId);
if (state.Crumbs != null && !state.Crumbs.Any())
{
return("<!-- BreadCrumbs stack is empty -->");
}
// don't allow blank labels to propagate outside
state.Crumbs.ToList().ForEach(x => { x.Label = string.IsNullOrWhiteSpace(x.Label) ? x.Action : x.Label; });
return(string.Join(" > ",
state.Crumbs.Select(x => "<a href=\"" + x.Url + "\">" + x.Label + "</a>").ToArray()));
}
/// <summary>
/// Redirects
/// </summary>
/// <returns></returns>
public static RedirectResult RedirectToPreviousUrl()
{
var previousPage = StateManager.GetState(SessionProvider.SessionId).Crumbs;
var updatedList = new SortedSet <StateEntry>(previousPage, new StateEntryComparer());
updatedList.Reverse();
if (updatedList.Count > 1)
{
if (string.IsNullOrEmpty(updatedList.Skip(1).First().Url))
{
return(new RedirectResult(updatedList.Skip(1).First().Url));
}
}
return(null);
}
/// <summary>
/// Get the full list of URL currently in the breadcrumb. Index 0 being the farthest page.
/// </summary>
/// <returns>The full list of URL currently in the breadcrumb</returns>
public static IEnumerable <string> GetOrderedUrls()
{
return(StateManager.GetState(SessionProvider.SessionId).Crumbs.Select(s => s.Url));
}
/// <summary>
/// Get the currently active URL from the BreadCrumb
/// </summary>
/// <returns>The currently active URL from the BreadCrumb</returns>
public static string GetCurrentUrl()
{
return(StateManager.GetState(SessionProvider.SessionId).Current.Url);
}
public static void SetLabel(string label)
{
var state = StateManager.GetState(SessionProvider.SessionId);
state.SetCurrentLabel(label);
}
public static void Add(string url, string label)
{
var state = StateManager.GetState(SessionProvider.SessionId);
state.Push(url, label);
}
/// <summary>
/// Get the full list of <see cref="RedirectResult"/> currently in the breadcrumb. Index 0 being the farthest page.
/// </summary>
/// <returns>The full list of <see cref="RedirectResult"/> currently in the breadcrumb</returns>
public static IEnumerable <RedirectResult> GetOrderedRedirections()
{
return(StateManager.GetState(SessionProvider.SessionId).Crumbs.Select(s => new RedirectResult(s.Url)));
}
/// <summary>
/// 获取面包屑导航
/// </summary>
/// <returns></returns>
public static State GetBreadCrumbState()
{
var state = StateManager.GetState(SessionProvider.SessionId);
return(state);
}