private static IEnumerable<SelectListItem> GetListsDropDown(GridMvcFilter tbFilter, int max)
{
var itemSelected = tbFilter.GridPageSize ?? GridMvcFilter.DefaultPagesize;
var list = new List<SelectListItem>();
const int defaultPageSize = GridMvcFilter.DefaultPagesize;
if (max <= defaultPageSize)
list.Add(new SelectListItem
{
Value = SetLink(tbFilter, defaultPageSize.ToString(CultureInfo.CurrentCulture)),
Text = defaultPageSize.ToString(CultureInfo.CurrentCulture),
Selected = true
});
else
{
for (var i = defaultPageSize; i < max + defaultPageSize; i += defaultPageSize)
{
list.Add(new SelectListItem
{
Value = SetLink(tbFilter, i.ToString(CultureInfo.CurrentCulture)),
Text = i.ToString(CultureInfo.CurrentCulture),
Selected = itemSelected == i
});
}
}
return list;
}
private static string SetLink(GridMvcFilter tblParams, string value)
{
var filter = tblParams.GridFilter != null ? tblParams.GridFilter.Split(',') : new string[] { };
var gridfilter = "";
if (filter.Length <= 0)
return String.Format("/{0}{1}?grid-page={2}&grid-page-size={3}{4}{5}",
tblParams.Controller,
(!string.IsNullOrEmpty(tblParams.Action) ? "/" + tblParams.Action : "") +
(!string.IsNullOrEmpty(tblParams.Id) ? ("/" + tblParams.Id) : ""),
tblParams.GridPage,
value,
tblParams.GridOrd != null ? ("&grid-ord=" + tblParams.GridOrd) : "",
gridfilter);
gridfilter = filter.Where(item => item.Length > 0).Aggregate(gridfilter, (current, item) => current + ("&grid-filter=" + item));
return String.Format("/{0}{1}?grid-page={2}&grid-page-size={3}{4}{5}",
tblParams.Controller,
(!string.IsNullOrEmpty(tblParams.Action) ? "/" + tblParams.Action : "") + (!string.IsNullOrEmpty(tblParams.Id) ? ("/" + tblParams.Id) : ""),
tblParams.GridPage,
value,
tblParams.GridOrd != null ? ("&grid-ord=" + tblParams.GridOrd) : "",
gridfilter);
}
public override void OnActionExecuted(ActionExecutedContext filterContext)
{
var controller = (Controller)filterContext.Controller;
var rd = filterContext.RouteData;
var request = filterContext.HttpContext.Request;
var model = controller.ViewData.Model as IQueryable<Object>;
var count = model != null ? model.Count() : 0;
int pagesize, page;
if (!int.TryParse(request.Params.Get("grid-page-size"), out pagesize))
pagesize = GridMvcFilter.DefaultPagesize;
if (!int.TryParse(request.Params.Get("grid-page"), out page))
page = 1;
var tbFilter = new GridMvcFilter
{
Id = rd.Values["id"] as string,
Action = rd.GetRequiredString("action"),
Controller = rd.GetRequiredString("controller"),
GridPage = page,
GridPageSize = pagesize,
GridFilter = request.Params.Get("grid-filter"),
GridOrd = request.Params.Get("grid-ord"),
};
controller.ViewBag.ItemsPerPage = pagesize;
controller.ViewBag.ListDropDown = GetListsDropDown(tbFilter, count);
}