Added new kb article grid-display-active-filters-in-excel-like-filtering (#639)

Co-authored-by: KB Bot <kb-bot@telerik.com>

Author: github-actions[bot]

knowledge-base/grid-display-active-filters-in-excel-like-filtering.md

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+---
+title: Display Active Filters in Excel-Like Filtering
+description: Learn how to show the filtered columns along with their specific values above a RadGrid control dynamically.
+type: how-to
+page_title: Display Active Filters in Excel-Like Filtering
+slug: grid-display-active-filters-in-excel-like-filtering
+tags: radgrid, asp.net ajax, filtering, display, columns, values
+res_type: kb
+ticketid: 1672360
+---
+
+## Environment
+
+<table>
+<tbody>
+<tr>
+<td>Product</td>
+<td>RadGrid for ASP.NET AJAX</td>
+</tr>
+<tr>
+<td>Version</td>
+<td>All</td>
+</tr>
+</tbody>
+</table>
+
+## Description
+
+I need to display which columns in a RadGrid are being filtered and what the specific filter values are for each column. The goal is to show this information in a label or a similar control above the RadGrid to let users know what filters are currently applied.
+
+This knowledge-base article also answers the following questions:
+- How can I show the active filters of a RadGrid?
+- What method can I use to display the filtered columns and their values in RadGrid?
+- Is it possible to list the current filters applied to a RadGrid above it?
+
+## Solution
+
+To display the filtered columns and their respective values above a RadGrid control, iterate through the columns, retrieve the details of the applied filters, and then display this information:
+ 
+1. Handle the `ItemCommand` event of the RadGrid.
+2. Loop through the columns to check which ones have filters applied.
+3. Retrieve the selected checkbox values for each column with Excel-like filtering.
+
+````C#
+protected void RadGrid1_ItemCommand(object sender, GridCommandEventArgs e)
+{
+    if (e.CommandName == RadGrid.HeaderContextMenuFilterCommandName)
+    {
+        foreach (GridColumn column in RadGrid1.MasterTableView.Columns)
+        {
+            string[] filterValues = column.ListOfFilterValues;
+
+            if (filterValues != null && filterValues.Length > 0)
+            {
+                string columnName = column.UniqueName;
+                string selectedValues = string.Join(", ", filterValues);
+
+                // Update your display control accordingly
+                Response.Write("Column: " + columnName + ", Selected Values: " + selectedValues);
+            }
+        }
+    }
+}
+````
+
+## See Also
+
+- [RadGrid Documentation](https://docs.telerik.com/devtools/aspnet-ajax/controls/grid/overview)
+- [Excel-like Filtering](https://demos.telerik.com/aspnet-ajax/grid/examples/functionality/filtering/excel-like-filtering/defaultcs.aspx)