Do not override BindingMode in the DataGridBoundColumn

6 years ago · 4f161701bd
1 changed files with 6 additions and 1 deletions
--- a/src/Avalonia.Controls.DataGrid/DataGridBoundColumn.cs
+++ b/src/Avalonia.Controls.DataGrid/DataGridBoundColumn.cs
@ -49,8 +49,13 @@ namespace Avalonia.Controls
                    {
                        if(_binding is Avalonia.Data.Binding binding)
                        {
+                            if (binding.Mode == BindingMode.OneWayToSource)
+                            {
+                                throw new InvalidOperationException("DataGridColumn doesn't support BindingMode.OneWayToSource");
+                            }
+
                            // Force the TwoWay binding mode if there is a Path present.  TwoWay binding requires a Path.
-                            if (!String.IsNullOrEmpty(binding.Path))
+                            if (!String.IsNullOrEmpty(binding.Path) && binding.Mode == BindingMode.Default)
                            {
                                binding.Mode = BindingMode.TwoWay;
                            }