C# 带RibbonComboBox的WPF绑定警告

我试图学习和理解c语言中的ribbon控件，特别是数据绑定，但在实现RibbonComboBox时收到了许多无法解决的警告。我已成功删除错误消息，但警告仍然存在。我怎样才能修好它

相关文件如下所示，我删除了无关信息以简化它们

这是XAML文件-MainWindow.XAML：

调试输出为：

System.Windows.Data Warning: 56 : Created BindingExpression (hash=47501665) for Binding (hash=55144039)
System.Windows.Data Warning: 58 :   Path: 'Shape'
System.Windows.Data Warning: 62 : BindingExpression (hash=47501665): Attach to System.Windows.Controls.Ribbon.RibbonGallery.SelectedItem (hash=13583655)
System.Windows.Data Warning: 67 : BindingExpression (hash=47501665): Resolving source 
System.Windows.Data Warning: 70 : BindingExpression (hash=47501665): Found data context element: RibbonGallery (hash=13583655) (OK)
System.Windows.Data Warning: 71 : BindingExpression (hash=47501665): DataContext is null
System.Windows.Data Warning: 65 : BindingExpression (hash=47501665): Resolve source deferred

System.Windows.Data Warning: 67 : BindingExpression (hash=47501665): Resolving source 
System.Windows.Data Warning: 70 : BindingExpression (hash=47501665): Found data context element: RibbonGallery (hash=13583655) (OK)
System.Windows.Data Warning: 78 : BindingExpression (hash=47501665): Activate with root item RibbonSettings (hash=61356140)
System.Windows.Data Warning: 108 : BindingExpression (hash=47501665):   At level 0 - for RibbonSettings.Shape found accessor RuntimePropertyInfo(Shape)
System.Windows.Data Warning: 104 : BindingExpression (hash=47501665): Replace item at level 0 with RibbonSettings (hash=61356140), using accessor RuntimePropertyInfo(Shape)
System.Windows.Data Warning: 101 : BindingExpression (hash=47501665): GetValue at level 0 from RibbonSettings (hash=61356140) using RuntimePropertyInfo(Shape): 'Square'
System.Windows.Data Warning: 80 : BindingExpression (hash=47501665): TransferValue - got raw value 'Square'
System.Windows.Data Warning: 89 : BindingExpression (hash=47501665): TransferValue - using final value 'Square'

菜单项正确显示在列表中，我可以从列表中选择一个选项

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我在绑定中添加了'UpdateSourceTrigger=PropertyChanged'，该绑定删除了'System.Windows.Data警告：61:BindingExpression hash=35104124:Default update trigger resolved to PropertyChanged'错误，但其他错误仍然无法找到。

您提到的警告只是扩展跟踪信息。只要绑定按预期工作，就不需要检查它们。但是，如果您在输出中看到System.Windows.Data错误，这意味着您需要注意它所说的内容。在我的例子中，最常见的原因是属性名称中的键入错误

通过更改WPF跟踪设置下的数据绑定设置，可以在选项->调试->输出窗口中进行更改

---

这是一个非常好的教程。

你是说代码工作正常，但是警告让你很烦恼吗？如果是这样，不要担心警告。顺便说一句，为什么SelectedItem上的绑定是单向的？最初我在SelectedItem和ItemsSource上都将绑定设置为双向，这导致了一个错误。我将两者都更改以删除错误，但现在已将其更改回单向。

using System.Collections.Generic;
using System.Windows.Controls.Ribbon;

namespace MyProject
{
    public partial class MainWindow : RibbonWindow
    {
        public MainWindow()
        {
            InitializeComponent();

            InitializeLists();
            this.DataContext = new RibbonSettings();
        }

        private void InitializeLists()
        {
            List<string> MyShapes = new List<string>
            {
                "Square", "Circle", "Ellipse", "Triangle", "Pentagon"
            };
            shapeList.ItemsSource = MyShapes;
        }
    }
}

using System.ComponentModel;
namespace MyProject
{
    class RibbonSettings : INotifyPropertyChanged
    {
        private string _shape = "Square";
        public string Shape
        {
            get { return _shape; }
            set
            {
                if (_shape == value) return;
                _shape = value;
                OnPropertyChanged("Shape");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }
}

System.Windows.Data Warning: 56 : Created BindingExpression (hash=47501665) for Binding (hash=55144039)
System.Windows.Data Warning: 58 :   Path: 'Shape'
System.Windows.Data Warning: 62 : BindingExpression (hash=47501665): Attach to System.Windows.Controls.Ribbon.RibbonGallery.SelectedItem (hash=13583655)
System.Windows.Data Warning: 67 : BindingExpression (hash=47501665): Resolving source 
System.Windows.Data Warning: 70 : BindingExpression (hash=47501665): Found data context element: RibbonGallery (hash=13583655) (OK)
System.Windows.Data Warning: 71 : BindingExpression (hash=47501665): DataContext is null
System.Windows.Data Warning: 65 : BindingExpression (hash=47501665): Resolve source deferred

System.Windows.Data Warning: 67 : BindingExpression (hash=47501665): Resolving source 
System.Windows.Data Warning: 70 : BindingExpression (hash=47501665): Found data context element: RibbonGallery (hash=13583655) (OK)
System.Windows.Data Warning: 78 : BindingExpression (hash=47501665): Activate with root item RibbonSettings (hash=61356140)
System.Windows.Data Warning: 108 : BindingExpression (hash=47501665):   At level 0 - for RibbonSettings.Shape found accessor RuntimePropertyInfo(Shape)
System.Windows.Data Warning: 104 : BindingExpression (hash=47501665): Replace item at level 0 with RibbonSettings (hash=61356140), using accessor RuntimePropertyInfo(Shape)
System.Windows.Data Warning: 101 : BindingExpression (hash=47501665): GetValue at level 0 from RibbonSettings (hash=61356140) using RuntimePropertyInfo(Shape): 'Square'
System.Windows.Data Warning: 80 : BindingExpression (hash=47501665): TransferValue - got raw value 'Square'
System.Windows.Data Warning: 89 : BindingExpression (hash=47501665): TransferValue - using final value 'Square'