SASS Theme Builder
You can see in this demo how you can enable filter row in the header by setting the grid's Filterable->Mode property to Row:
.Filterable(ftb => ftb.Mode(GridFilterMode.Row))Therefore, based on the data type of the underlying columns data, the grid will render textboxes for string values, numeric text boxes or date pickers for filtering in the column headers.
Additionally, you can specify a default filter operator to be applied when the user enters some value in the filter textbox and presses
.Filterable(ftb => ftb.Cell(cell => cell.Operator("contains") attribute of the corresponding column, as shown for the Ship Name and Freight columns.
More about the filterable feature of the Telerik Grid for ASP.NET Core
More about Telerik Grid for ASP.NET Core