wpf datagrid：在wpf中创建DatagridNumericColumn

在WPF中，DataGrid是一个非常常用的控件，用于在界面上展示和编辑数据。然而，当我们需要在DataGrid中显示数值类型的数据时，自带的DataGridTextColumn并不能满足我们的需求，因为它只能接受文本类型的输入。为了解决这个问题，我们可以自定义一个DatagridNumericColumn，使其只接受数字类型的输入。

csharp
public class DatagridNumericColumn : DataGridTextColumn
{
    protected override object PrepareCellForEdit(FrameworkElement editingElement, RoutedEventArgs editingEventArgs)
    {
        var textBox = editingElement as TextBox;
        if (textBox != null)
        {
            textBox.PreviewTextInput += NumericOnlyTextInput;
            DataObject.AddPastingHandler(textBox, NumericOnlyPasteInput);
        }
        
        return base.PrepareCellForEdit(editingElement, editingEventArgs);
    }
    private void NumericOnlyTextInput(object sender, TextCompositionEventArgs e)
    {
        foreach (var c in e.Text)
        {
            if (!char.IsDigit(c))
            {
                e.Handled = true;
                break;
            }
        }
    }
    private void NumericOnlyPasteInput(object sender, DataObjectPastingEventArgs e)
    {
        if (e.DataObject.GetDataPresent(typeof(string)))
        {
            var pastedText = (string)e.DataObject.GetData(typeof(string));
            if (!string.IsNullOrEmpty(pastedText))
            {
                foreach (var c in pastedText)
                {
                    if (!char.IsDigit(c))
                    {
                        e.CancelCommand();
                        break;
                    }
                }
            }
        }
        else
        {
            e.CancelCommand();
        }
    }
}

xaml
xmlns:local="clr-namespace:YourNamespace"

xaml
    
        
    

csharp
public class Person
{
    public int Age { get; set; }
}

csharp
public partial class MainWindow : Window
{
    public ObservableCollection People { get; set; }
    public MainWindow()
    {
        InitializeComponent();
        People = new ObservableCollection
        {
            new Person { Age = 20 },
            new Person { Age = 30 },
            new Person { Age = 40 }
        };
        DataContext = this;
    }
}

xaml
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:YourNamespace"
        Title="MainWindow" Height="450" Width="800">