C# 将非文本对象拖放到RichTextBox

我正在尝试将非文本对象从Label拖放到RichTextBox。但当我将鼠标移到RTB上时，它不允许我跌落

public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            richTextBox1.AllowDrop = true;
            richTextBox1.Drop+=new DragEventHandler(richTextBox1_Drop);
            richTextBox1.DragEnter +=new DragEventHandler(richTextBox1_DragEnter);
            richTextBox1.DragOver+=new DragEventHandler(richTextBox1_DragOver);  

            labelSender.MouseDown+=new MouseButtonEventHandler(labelSender_MouseDown);
        }

        private void richTextBox1_Drop(object sender, DragEventArgs e)
        {
            DropContent dropContent = (DropContent)e.Data.GetData(typeof(DropContent));
            richTextBox1.AppendText(dropContent.Content);
        }

        private void richTextBox1_DragOver(object sender, DragEventArgs e)
        {
            e.Effects = DragDropEffects.Copy;
        }

        private void richTextBox1_DragEnter(object sender, DragEventArgs e)
        {
            e.Effects = DragDropEffects.Copy;
        }

        private void labelSender_MouseDown(object sender, MouseEventArgs e)
        {
            DragDrop.DoDragDrop((Label)sender, new DropContent("HelloRichTextBox"), DragDropEffects.Copy);
        }
    }

    public class DropContent //Object containing dragging data
    {
        public string Content;
        public DropContent(string content)
        {
            this.Content = content;
        }
    }

RTB似乎只允许删除文本。

解决此问题的“Xcalibur37”代码部分位于dragOver事件中：

e.Handled = true;

希望它能解决其他人的问题，因为它解决了我的问题，而这正是最初的问题

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您可以在此页面上查看他的完整答案：

您不需要拖放方法和DropContent类。您只需编写MouseDown方法：

public partial class MainWindow : Window {
    public MainWindow() {
        InitializeComponent();
        richTextBox1.AllowDrop = true;  
        labelSender.MouseDown += new MouseButtonEventHandler(labelSender_MouseDown)
    }

    private void labelSender_MouseDown(object sender, MouseButtonEventArgs e) {
        DragDrop.DoDragDrop((Label)sender, ((Label)sender).Content, DragDropEffects.Copy);
    }
}

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DropContent类似乎只对文本感兴趣。任何对象都可以拖动，在drop事件处理程序中对其执行的操作取决于您。