我想部分地将密码字段从点到星号掩盖。我尝试使用转换器,但无法正常工作。以xamarin形式实现这一目标的最佳方法是什么。
<Entry IsPassword="True"
Placeholder="password"
Text="{Binding Password.Value, Mode=TwoWay, Converter={StaticResource
MaskedPasswordConverter}}"
MaxLength="6">
public class MaskedPasswordConverter : IValueConverter
{
private string _value;
public object Convert(object value, Type targetType, object parameter, CultureInfo
culture)
{
var str = (value ?? "").ToString();
_value = str;
var maskedStr = "";
if (!string.IsNullOrEmpty(str) && str.Length > 2)
{
var domainStr = str.IndexOf('@');
var lengthOfMask = domainStr - 2;
maskedStr = str.Substring(0, 2) + new string('*', lengthOfMask) +
str.Substring(domainStr);
}
return maskedStr;
}
public object ConvertBack(object value, Type targetType, object parameter,
CultureInfo culture)
{
return value;
}
}