public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
if (For == null)
{
throw new ArgumentNullException(ForAttributeName);
}
if (KeyName == null && !FromRow.HasValue)
{
throw new ArgumentNullException(KeyAttributeName);
}
var rc = context.GetFatherReductionContext();
if (rc.RowParsingDisabled)
{
output.TagName = string.Empty;
output.Content.SetHtmlContent(string.Empty);
return;
}
var nc = new ReductionContext(TagTokens.Row, 0, rc.Defaults);
context.SetChildrenReductionContext(nc);
await output.GetChildContentAsync();
RowType inherit = null;
if (FromRow.HasValue)
{
var count = 0;
foreach (var item in rc.Results)
{
if (item.Token == TagTokens.Row)
{
if (FromRow.Value == count)
{
inherit = item.Result as RowType;
continue;
}
else
{
count++;
}
}
}
}
var collector = new RowCollector(nc, FromRow);
var res = collector.Process(this, rc.Defaults);
if (res != null)
{
rc.Results.Add(new ReductionResult(TagTokens.Row, 0, res));
}
output.TagName = string.Empty;
output.Content.SetHtmlContent(string.Empty);
}