Added new kb article dropdownlist-add-clear-button

knowledge-base/dropdownlist-add-clear-button.md

@@ -0,0 +1,79 @@
+---
+title: How to Add a Clear Button inside DropDownList
+description: Learn how to integrate a clear button within the DropDownList for Blazor to enable users to reset the selected value easily.
+type: how-to
+page_title: How to Add a Clear Button Inside the DropDownList for Blazor
+slug: dropdownlist-kb-add-clear-button
+tags: dropdownlist, clear, button, reset
+res_type: kb
+ticketid: 1680480, 1612125
+---
+
+## Environment
+<table>
+	<tbody>
+		<tr>
+			<td>Product</td>
+			<td>DropDownList for Blazor</td>
+		</tr>
+	</tbody>
+</table>
+
+## Description
+
+This knowledge base answers the following questions:
+
+- How can I add a reset functionality to the [DropDownList for Blazor](slug:components/dropdownlist/overview)?
+- Is it possible to integrate a clear button within the DropDownList for Blazor?
+- What is the approach to clear the selected item in DropDownList for Blazor?
+
+## Solution
+
+To add a clear button inside the DropDownList component, follow the steps below:
+
+1. Include CSS style to position the clear button within the DropDownList.
+2. Implement a method that resets the selected value upon clicking the clear button.
+
+`````RAZOR
+<style>
+    .reset-button {
+        margin-left: -3.5em;
+        z-index: 10000;
+    }
+</style>
+
+<TelerikDropDownList @bind-Value="@SelectedItem"
+                     DefaultText=""
+                     Data="@DropDownData"
+                     Width="320px"
+                     Id="country">
+    <DropDownListSettings>
+        <DropDownListPopupSettings Height="auto" />
+    </DropDownListSettings>
+</TelerikDropDownList>
+
+<TelerikButton Class="reset-button"
+               Size="sm"
+               Visible="@(SelectedItem != null)"
+               FillMode="@ThemeConstants.Button.FillMode.Flat"
+               ButtonType="ButtonType.Reset"
+               Icon="@SvgIcon.X"
+               OnClick="@HandleDropDownListReset">
+</TelerikButton>
+
+@code {
+    protected string? SelectedItem { get; set; }
+
+    protected List<string> DropDownData = new List<string>() { "first", "second", "third" };
+
+    private void HandleDropDownListReset()
+    {
+        SelectedItem = null;
+    }
+}
+`````
+
+## See Also
+
+- [Overview of the DropDownList for Blazor](slug:components/dropdownlist/overview)
+- [Overview of the DropDownList for Blazor](slug:components/button/overview)