From 386be0fa0ba5545fe584cd44a03972489081c762 Mon Sep 17 00:00:00 2001
From: yoyo <zrt2399@163.com>
Date: Sun, 26 Jul 2026 16:12:29 +0800
Subject: [PATCH] fix(TextBox): initialize command states in constructor
 (#21859)

---
 src/Avalonia.Controls/TextBox.cs                  |  1 +
 tests/Avalonia.Controls.UnitTests/TextBoxTests.cs | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/Avalonia.Controls/TextBox.cs b/src/Avalonia.Controls/TextBox.cs
index 408e837043..c8e37c132a 100644
--- a/src/Avalonia.Controls/TextBox.cs
+++ b/src/Avalonia.Controls/TextBox.cs
@@ -431,6 +431,7 @@ namespace Avalonia.Controls
             _undoRedoHelper = new UndoRedoHelper<UndoRedoState>(this);
             _selectedTextChangesMadeSinceLastUndoSnapshot = 0;
             _hasDoneSnapshotOnce = false;
+            UpdateCommandStates();
             UpdatePseudoclasses();
         }
 
diff --git a/tests/Avalonia.Controls.UnitTests/TextBoxTests.cs b/tests/Avalonia.Controls.UnitTests/TextBoxTests.cs
index 39dd5efa1d..b8e781840f 100644
--- a/tests/Avalonia.Controls.UnitTests/TextBoxTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/TextBoxTests.cs
@@ -1549,6 +1549,19 @@ namespace Avalonia.Controls.UnitTests
             }
         }
 
+        [Fact]
+        public void Empty_TextBox_Initializes_Clipboard_Command_States()
+        {
+            using (UnitTestApplication.Start(Services))
+            {
+                var tb = new TextBox();
+
+                Assert.False(tb.CanCopy);
+                Assert.False(tb.CanCut);
+                Assert.True(tb.CanPaste);
+            }
+        }
+
         [Fact]
         public void Command_States_Update_When_ReadOnly_And_PasswordChar_Change()
         {