public override void RenderColumnHeader(IGridColumn <TModel> column, string key, int nextSortOrder, bool isGroupTableHeader)
{
var th = new TagBuilder("th");
th.MergeAttributes(column.HeaderAttributes);
if (column.SortDirection.HasValue)
{
th.Attributes["class"] = th.Attributes.ContainsKey("class")? "sorted " + th.Attributes["class"]: "sorted";
}
Writer.Write(th.ToString(TagRenderMode.StartTag));
if (column.HeaderRender != null)
{
var value = column.HeaderRender(HtmlHelper);
Writer.Write(value);
}
else
{
var isGroupableColumn = (!isGroupTableHeader && column.GroupKeyProperty != null && !column.GroupOrder.HasValue);
var groupClass = isGroupableColumn ? GroupHeaderClass : string.Empty;
var groupTag = string.Empty;
if (isGroupableColumn)
{
var groupTagBuilder = new TagBuilder("sup");
groupTagBuilder.AddCssClass("grid-group-tag");
groupTagBuilder.SetInnerText("G");
if (!String.IsNullOrEmpty(GridRenderOptions.GroupTagTitle))
{
groupTagBuilder.Attributes["title"] = GridRenderOptions.GroupTagTitle;
}
groupTag = groupTagBuilder.ToString(TagRenderMode.Normal);
}
Writer.Write("<div class=\"grid-column-wrap {2}\" data-key=\"{0}\" data-title=\"{1}\">", key, column.Title, groupClass);
Writer.Write(groupTag);
var isSortableColumn = column.SortProperty != null;
if (isSortableColumn)
{
RenderSortableColumnHeader(column, key, nextSortOrder, isGroupTableHeader);
}
else
{
Writer.Write("<span class=\"grid-column-title\">{0}</span>", column.Title);
}
Writer.Write("</div>");
}
Writer.Write("</th>");
}
