public static MvcHtmlString BuildNextPreviousLinks(this HtmlHelper htmlHelper, QueryOptions queryOptions, string actionName)
{
var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext);
return new MvcHtmlString(string.Format(
"<nav>" +
" <ul class=\"pager\">" +
" <li class=\"previous {0}\">{1}</li>" +
" <li class=\"next {2}\">{3}</li>" +
" </ul>" +
"</nav>",
IsPreviousDisabled(queryOptions),
BuildPreviousLink(urlHelper, queryOptions, actionName),
IsNextDisabled(queryOptions),
BuildNextLink(urlHelper, queryOptions, actionName)
));
}
public static MvcHtmlString BuildSortableLink(this HtmlHelper htmlHelper,
string fieldName, string actionName, string sortField, QueryOptions queryOptions)
{
var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext);
var isCurrentSortField = queryOptions.SortField == sortField;
return new MvcHtmlString(string.Format("<a href=\"{0}\">{1} {2}</a>",
urlHelper.Action(actionName,
new {
SortField = sortField,
SortOrder = (isCurrentSortField
&& queryOptions.SortOrder == SortOrder.ASC.ToString())
? SortOrder.DESC : SortOrder.ASC
}),
fieldName,
BuildSortIcon(isCurrentSortField, queryOptions)));
}
private static string BuildNextLink(UrlHelper urlHelper, QueryOptions queryOptions, string actionName)
{
return string.Format(
"<a href=\"{0}\">Next <span aria-hidden=\"true\">→</span></a>",
urlHelper.Action(actionName, new
{
SortOrder = queryOptions.SortOrder,
SortField = queryOptions.SortField,
CurrentPage = queryOptions.CurrentPage + 1,
PageSize = queryOptions.PageSize
}));
}
private static string IsPreviousDisabled(QueryOptions queryOptions)
{
return (queryOptions.CurrentPage == 1)
? "disabled" : string.Empty;
}
private static string IsNextDisabled(QueryOptions queryOptions)
{
return (queryOptions.CurrentPage == queryOptions.TotalPages)
? "disabled" : string.Empty;
}
private static string BuildSortIcon(bool isCurrentSortField, QueryOptions queryOptions)
{
string sortIcon = "sort";
if (isCurrentSortField)
{
sortIcon += "-by-alphabet";
if (queryOptions.SortOrder == SortOrder.DESC.ToString())
sortIcon += "-alt";
}
return string.Format("<span class=\"{0} {1}{2}\"></span>",
"glyphicon", "glyphicon-", sortIcon);
}
public static int CalculateStart(QueryOptions queryOptions)
{
return (queryOptions.CurrentPage - 1) * queryOptions.PageSize;
}