public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
var columnGroupContext = (DataTableColumnGroupContext)context.Items[typeof(DataTableColumnGroupContext)];
var mergedColumnContext = new DataTableColumnGroupContext();
context.Items[typeof(DataTableColumnGroupContext)] = mergedColumnContext;
await output.GetChildContentAsync();
Column.Searchable = false; //TODO add support
Column.Orderable = false; //TODO add support
var renderFunction = new StringBuilder();
renderFunction.AppendLine("function(data, type, row, meta) {");
renderFunction.AppendLine(" var ret = '';");
foreach (var column in mergedColumnContext.Columns)
{
renderFunction.AppendFormat(
" ret += {0}(row{1}, type, row, meta);",
column.Render ?? "function(data){return data;}",
column.Data?.Insert(0, ".")
).AppendLine();
}
renderFunction.AppendLine(" return ret;");
renderFunction.Append("}");
Column.Render = renderFunction.ToString();
columnGroupContext.Columns.Add(Column);
output.SuppressOutput();
}
public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
var columnGroupContext = new DataTableColumnGroupContext();
context.Items[typeof(DataTableColumnGroupContext)] = columnGroupContext;
await output.GetChildContentAsync();
var dataTableContext = (DataTableContext)context.Items[typeof(DataTableContext)];
var options = dataTableContext.Options;
options.Columns = options.Columns.Union(columnGroupContext.Columns).ToArray();
output.SuppressOutput();
}