DataGrid列宽字符串到宽度转换器MVVM

using System;
using System.Globalization;
using System.Windows.Data;

public class ColumnWidthConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        string widthString = value as string;

        // 根据具体需求进行列宽度字符串到数值的转换处理
        // 这里只是一个示例，具体实现根据实际情况进行调整
        double width;
        if (double.TryParse(widthString, out width))
        {
            return width;
        }
        else if (widthString == "Auto")
        {
            return double.NaN;
        }
        else if (widthString == "*")
        {
            return new DataGridLength(1, DataGridLengthUnitType.Star);
        }

        return double.NaN;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotSupportedException();
    }
}

<DataGrid Width="{Binding ColumnWidth, Converter={StaticResource ColumnWidthConverter}}">
    <!-- DataGrid的内容 -->
</DataGrid>