是否有可能标志着一个属性网格作为密码字段中显示的属性

Question

我使用C＃和具有包含属性网格控制一个视窗形式。

我已分配PropertyGrid中的SelectedObject到一个设置文件，其中显示，让我编辑设置。然而的设置之一是密码 - 我想它显示在字段星号，而不是密码设置的明文值

保存时的字段将被加密，但我希望它表现得像用星号正常密码输入框中显示，当用户在口令输入。

我不知道是否存在能够被施加到设置属性，将其标记为是密码的属性

感谢。

Answer 1

与.net 2开始，可以使用 PasswordPropertyTextAttribute 附着到您的密码属性。

希望这有助于。

Answer 2

下面是我在过去所做的那样。它显示“********”用于在网格中的密码，用“...”按钮，以允许用户设置的密码（使用您提供的对话框）。

public class User
{
    [TypeConverter(typeof(PasswordConverter))]
    [Editor(typeof(PasswordEditor), typeof(UITypeEditor))]
    public string Password { get; set; }
}

public class PasswordConverter : TypeConverter
{
    public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
    {
        if (destinationType == typeof(string)) return true;

        return base.CanConvertTo(context, destinationType);
    }

    public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
    {
        if (destinationType == typeof(string))
        {
            string password = (string)value;

            if (password != null && password.Length > 0)
            {
                return "********";
            }
        }

        return base.ConvertTo(context, culture, value, destinationType);
    }
}

public class PasswordEditor : UITypeEditor
{
    public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
    {
        string password = (string)value;

        // Show a dialog allowing the user to enter a password

        return password;
    }

    public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
    {
        return UITypeEditorEditStyle.Modal;
    }
}

Answer 3

我不认为你可以得到的PropertyGrid交换到星号，但你也许可以用单向型转换器和一个模式编辑器...像这样：

using System;
using System.ComponentModel;
using System.Drawing.Design;
using System.Windows.Forms;
using System.Windows.Forms.Design;
class Foo
{
    [TypeConverter(typeof(PasswordConverter))]
    [Editor(typeof(PasswordEditor), typeof(UITypeEditor))]
    public string Password { get; set; }

    // just to show for debugging...
    public string PasswordActual { get { return Password; } }
}
class PasswordConverter : TypeConverter
{
    public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, System.Type destinationType)
    {
        return destinationType == typeof(string) ? "********" : 
            base.ConvertTo(context, culture, value, destinationType);


    }
}
class PasswordEditor : UITypeEditor
{
    public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
    {
        return UITypeEditorEditStyle.Modal;
    }
    public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
    {
        IWindowsFormsEditorService svc = (IWindowsFormsEditorService)
            provider.GetService(typeof(IWindowsFormsEditorService));
        if (svc != null) {
            TextBox tb;
            Button btn;
            Form frm = new Form { Controls = {
                 (tb = new TextBox { PasswordChar = '*', Dock = DockStyle.Top,
                     Text = (string)value}),
                 (btn = new Button { Text = "OK", Dock = DockStyle.Bottom, DialogResult = DialogResult.OK})
            }, AcceptButton = btn};

            if (frm.ShowDialog() == DialogResult.OK)
            {
                value = tb.Text;
            }
        }
        return value;
    }
}
static class Program {
    [STAThread]
    static void Main() {
        Application.EnableVisualStyles();
        Application.Run(new Form {
            Controls = {
                new PropertyGrid {
                    Dock = DockStyle.Fill,
                    SelectedObject = new Foo { Password = "Bar"}
                }
            }
        });
    }
}