IMultiValueConverter，将值（字符串）转换回与targetTypes（WPF）中给定类型兼容的数组

我想编写一个IMultiValueConverter，它将返回值（字符串）转换为一个数组，数组中的对象与targetTypes参数中给定的类型兼容，如下所示：

public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
    if (value != null)
    {
        List<object> results = new List<object>();
        string[] arr = value.ToString().Split(' ');
        for (int i = 0; i < arr.Length; i++)
        {
            object item = (targetTypes[i])arr[i]; //ERROR: Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement
        }
        return results.ToArray();
    }
    else
    {
        return null;
    }
}

---

您可以尝试以下方法：

public object[] ConvertBack(
    object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
    var strings = value.ToString().Split(' ');

    if (strings.Length != targetTypes.Length)
    {
        throw new InvalidOperationException("Invalid number of substrings");
    }

    return strings
            .Select((s, i) => System.Convert.ChangeType(s, targetTypes[i]))
            .ToArray();
}

public object[] ConvertBack(
    object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
    var strings = value.ToString().Split(' ');

    if (strings.Length != targetTypes.Length)
    {
        throw new InvalidOperationException("Invalid number of substrings");
    }

    return strings
            .Select((s, i) => System.Convert.ChangeType(s, targetTypes[i]))
            .ToArray();
}