输入ISPassword和IsReadonly

发布于 2025-02-06 13:10:43 字数 636 浏览 0 评论 0原文

我想创建一个详细信息，该详细信息显示了不可编辑的信息，其中某些值像密码条目一样被隐藏/掩盖了“ *****”。我希望用户能够切换一个允许他们看到值的按钮。我尝试使用具有与ISPassword具有绑定的输入控件，其中ISreadonly设置为true如下：

<HorizontalStackLayout>
    <Entry Text="{Binding SomeValue}" 
            IsPassword="{Binding ShowValue}" 
            IsReadOnly="True"/>
    <ImageButton Source="visibility.svg"
                    Padding="20,0,0,0"
                    Command="{Binding ToggleValueCommand}"/>
</HorizontalStackLayout>

但是，即使ISPassword为true，iSreadonly设置为true true，即使

这是正确的行为？如果我无法将isReadonly =“ true”的条目使用，那么拥有标签具有此功能的最佳方法是什么。我应该使用ValueConverter还是行为？

原文

I want to create a DetailsPage that shows non-editable information where some values are hidden/masked like a password entry with "*****". I would like the user to be able to toggle a button that allows them to see the value. I tried using an Entry control that has a binding to IsPassword with IsReadOnly set to true as follows:

<HorizontalStackLayout>
    <Entry Text="{Binding SomeValue}" 
            IsPassword="{Binding ShowValue}" 
            IsReadOnly="True"/>
    <ImageButton Source="visibility.svg"
                    Padding="20,0,0,0"
                    Command="{Binding ToggleValueCommand}"/>
</HorizontalStackLayout>

However, when IsReadOnly is set to true the entry shows the text value even when IsPassword is True

Is this the proper behavior?
If I cannot use an Entry with IsReadOnly="True", then what is the best way to have a Label have this functionality. Should I use a ValueConverter or a Behavior?

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世俗缘 2025-02-13 13:10:43

作为解决方法，您可以用输入用标签替换，每次单击按钮时更改值。

示例代码

XAML

<HorizontalStackLayout>
    <Label Text="{Binding SomeValue}" />
    <ImageButton Source="visibility.svg" Padding="20,0,0,0" Command="{Binding ToggleValueCommand}"/>
</HorizontalStackLayout>

代码背后

public class ViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged; 
    private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    private bool showValue;

    private string someValue;
    public string SomeValue
    {
        get
        {
            return someValue;
        }
        set
        {
            someValue = value;
            NotifyPropertyChanged();
        }
    }

    public ICommand ToggleValueCommand { get; set; }

    private string copy;
 
    public ViewModel()
    {
        showValue = true;
        SomeValue = "1234";
        copy = SomeValue;

        ToggleValueCommand = new Command<string>((s) => {

            showValue = !showValue;

            if (showValue)
            {
                SomeValue = copy;
            }
            else
            {
                SomeValue = "";
                for (int i = 0; i < copy.Length; i++)
                {
                    SomeValue += "*";
                }
            }
        });
    }
}

As a workaround , you can replace Entry with a Label , change the value while clicking the button each time .

Sample code

Xaml

<HorizontalStackLayout>
    <Label Text="{Binding SomeValue}" />
    <ImageButton Source="visibility.svg" Padding="20,0,0,0" Command="{Binding ToggleValueCommand}"/>
</HorizontalStackLayout>

code behind

public class ViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged; 
    private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    private bool showValue;

    private string someValue;
    public string SomeValue
    {
        get
        {
            return someValue;
        }
        set
        {
            someValue = value;
            NotifyPropertyChanged();
        }
    }

    public ICommand ToggleValueCommand { get; set; }

    private string copy;
 
    public ViewModel()
    {
        showValue = true;
        SomeValue = "1234";
        copy = SomeValue;

        ToggleValueCommand = new Command<string>((s) => {

            showValue = !showValue;

            if (showValue)
            {
                SomeValue = copy;
            }
            else
            {
                SomeValue = "";
                for (int i = 0; i < copy.Length; i++)
                {
                    SomeValue += "*";
                }
            }
        });
    }
}

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