✨ Add Control.GetAllControls

X10D.WinForms/ControlExtensions.cs

@@ -2,6 +2,9 @@
 {
     #region Using Directives
 
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
     using System.Windows.Forms;
 
     #endregion
@@ -11,6 +14,43 @@
     /// </summary>
     public static class ControlExtensions
     {
+        /// <summary>
+        /// Gets all controls and child controls of a specified control.
+        /// </summary>
+        /// <param name="control">The parent control.</param>
+        /// <returns>Returns a collection of controls.</returns>
+        public static IEnumerable<Control> GetAllControls(this Control control)
+        {
+            return control.GetAllControls<Control>();
+        }
+
+        /// <summary>
+        /// Gets all controls and child controls of a specified control, which match the specified type.
+        /// </summary>
+        /// <typeparam name="TControl">A <see cref="Control"/> type.</typeparam>
+        /// <param name="control">The parent control.</param>
+        /// <returns>Returns a collection of controls.</returns>
+        public static IEnumerable<TControl> GetAllControls<TControl>(this Control control)
+            where TControl : Control
+        {
+            return control.GetAllControls(typeof(TControl)).Cast<TControl>();
+        }
+
+        /// <summary>
+        /// Gets all controls and child controls of a specified control, which match the specified type.
+        /// </summary>
+        /// <param name="control">The parent control.</param>
+        /// <param name="type">The type to match.</param>
+        /// <returns>Returns a collection of controls.</returns>
+        public static IEnumerable<Control> GetAllControls(this Control control, Type type)
+        {
+            IEnumerable<Control> controls = control.Controls.Cast<Control>().ToArray();
+
+            return controls.SelectMany(c => GetAllControls(c, type))
+                           .Concat(controls)
+                           .Where(c => c.GetType() == type);
+        }
+
         /// <summary>
         /// Thread-safe method invocation. Calls <see cref="Control.Invoke(System.Delegate)"/> if
         /// <see cref="Control.InvokeRequired"/> returns <see langword="true"/>.

X10D.WinForms/README.md

@@ -8,5 +8,5 @@ Below is a list of the number of extension methods written for a given type. Ove
 
 | Type | Library | Method count |
 | :--- | :--- | :--- |
-| `Control` | `X10D.WinForms` | 1 |
+| `Control` | `X10D.WinForms` | 2 |
 | `ListViewItem` | `X10D.Unity` | 1 |