Added new kb article gridview-distinct-values-change-string

knowledge-base/gridview-distinct-values-change-string.md

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+---
+title: Customizing Filter Text for Enum and Bool Columns in RadGridView
+description: Learn how to customize the filter menu text for bool and enum columns in RadGridView for WinForms, replacing default values with user-friendly labels.
+type: how-to
+page_title: How to Change Filter Menu Text for Bool and Enum Columns in RadGridView
+meta_title: Changing Filter Menu Text for Bool and Enum Columns in RadGridView
+slug: customizing-filter-text-radgridview-winforms
+tags: radgridview, winforms, filter, bool, enum, customization
+res_type: kb
+ticketid: 1690734
+---
+
+## Environment
+
+|Product Version|Product|Author|
+|----|----|----|
+|2025.2.520|RadGridView for WinForms|[Dinko Krastev](https://www.telerik.com/blogs/author/dinko-krastev)|
+
+## Description
+
+I want to customize the automatic filter menu in RadGridView for WinForms in two ways:
+
+1. For columns of type `bool`, replace "True" and "False" with "Checked" and "Unchecked".
+2. For columns of type `enum`, display the text from their `[Description]` attribute instead of the raw enum names.
+
+## Solution
+
+To achieve this customization, handle the `FilterPopupInitialized` event of RadGridView and modify the text in the filter menu using the `RadTreeView.NodeFormatting` event. Below is the implementation:
+
+### Customizing Bool Column Filter Text
+
+Use the following code:
+
+````C#
+
+this.radGridView1.FilterPopupInitialized += RadGridView1_FilterPopupInitialized;   
+
+private void RadGridView1_FilterPopupInitialized(object sender, FilterPopupInitializedEventArgs e)
+{
+    if (e.Column.Name == "boolColumn") // Replace with your column name
+    {
+        RadListFilterPopup radListFilterPopup = e.FilterPopup as RadListFilterPopup;
+
+        if (radListFilterPopup != null)
+        {
+            radListFilterPopup.MenuTreeElement.TreeView.NodeFormatting -= BoolFormattingHandler;
+            radListFilterPopup.MenuTreeElement.TreeView.NodeFormatting += BoolFormattingHandler;
+            radListFilterPopup.MenuTreeElement.TreeView.Refresh();
+        }
+    }
+}
+
+private void BoolFormattingHandler(object sender, TreeNodeFormattingEventArgs e)
+{
+    if (e.Node.Text == "False")
+        e.NodeElement.ContentElement.Text = "Unchecked";
+    else if (e.Node.Text == "True")
+        e.NodeElement.ContentElement.Text = "Checked";
+}
+
+````
+
+### Customizing Enum Column Filter Text
+
+For enum values with `[Description]` attributes, use the following code:
+
+````C#
+
+this.radGridView1.FilterPopupInitialized += RadGridView1_FilterPopupInitialized;
+
+private void RadGridView1_FilterPopupInitialized(object sender, FilterPopupInitializedEventArgs e)
+{
+    if (e.Column.Name == "enumColumn") // Replace with your column name
+    {
+        RadListFilterPopup radListFilterPopup = e.FilterPopup as RadListFilterPopup;
+
+        if (radListFilterPopup != null)
+        {
+            radListFilterPopup.MenuTreeElement.TreeView.NodeFormatting -= EnumFormattingHandler;
+            radListFilterPopup.MenuTreeElement.TreeView.NodeFormatting += EnumFormattingHandler;
+            radListFilterPopup.MenuTreeElement.TreeView.Refresh();
+        }
+    }
+}
+
+private void EnumFormattingHandler(object sender, TreeNodeFormattingEventArgs e)
+{
+    string description = GetEnumDescription(e.Node.Text);
+    if (!string.IsNullOrEmpty(description))
+        e.NodeElement.ContentElement.Text = description;
+}
+
+private string GetEnumDescription(string enumName)
+{
+    // Replace YourEnumType with the actual enum type
+    var fieldInfo = typeof(YourEnumType).GetField(enumName);
+    var attributes = (DescriptionAttribute[])fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);
+    return attributes.Length > 0 ? attributes[0].Description : enumName;
+}
+
+````
+
+## See Also
+
+- [RadGridView Documentation](https://docs.telerik.com/devtools/winforms/controls/gridview/overview)