public IHtmlContent Render(IGridColumn column)
{
if (!column.FilterEnabled)
{
return(new HtmlString(string.Empty));
}
//determine current column filter settings
var filterSettings = new List <ColumnFilterValue>();
if (_settings.IsInitState(column) && column.InitialFilterSettings != ColumnFilterValue.Null)
{
filterSettings.Add(column.InitialFilterSettings);
}
else
{
filterSettings.AddRange(_settings.FilteredColumns.GetByColumn(column));
}
bool isColumnFiltered = filterSettings.Any();
//determine current url:
var builder = new CustomQueryStringBuilder(_settings.Query);
var exceptQueryParameters = new List <string>
{
QueryStringFilterSettings.DefaultTypeQueryParameter,
QueryStringFilterSettings.DefaultClearInitFilterQueryParameter
};
string pagerParameterName = GetPagerQueryParameterName(((ISGrid)column.ParentGrid).Pager);
if (!string.IsNullOrEmpty(pagerParameterName))
{
exceptQueryParameters.Add(pagerParameterName);
}
string url = builder.GetQueryStringExcept(exceptQueryParameters);
var clearInitFilter = _settings.Query[QueryStringFilterSettings.DefaultClearInitFilterQueryParameter];
var gridFilterButton = new TagBuilder("span");
gridFilterButton.AddCssClass(FilterButtonCss);
if (isColumnFiltered)
{
gridFilterButton.AddCssClass(FilteredButtonCssClass);
}
gridFilterButton.Attributes.Add("title", Strings.FilterButtonTooltipText);
var gridFilter = new TagBuilder("div");
var dataKeyList = new Dictionary <string, string>
{
{ "data-type", column.FilterWidgetTypeName },
{ "data-name", column.Name },
{ "data-widgetdata", JsonHelper.JsonSerializer(column.FilterWidgetData) },
{ "data-filterdata", JsonHelper.JsonSerializer(filterSettings) },
{ "data-url", url },
{ "data-clearinitfilter", clearInitFilter.ToString() }
};
using (var sw = new StringWriter())
{
gridFilterButton.WriteTo(sw, HtmlEncoder.Default);
gridFilter.InnerHtml.SetHtmlContent(sw.ToString());
}
gridFilter.AddCssClass("grid-filter");
foreach (var data in dataKeyList)
{
if (!string.IsNullOrWhiteSpace(data.Value))
{
gridFilter.Attributes.Add(data.Key, data.Value);
}
}
using (var sw = new StringWriter())
{
gridFilter.WriteTo(sw, HtmlEncoder.Default);
return(new HtmlString(sw.ToString()));
}
}
