我正在使用C#并且有一个包含属性网格控件的窗体。
我已将propertygrid的SelectedObject分配给设置文件,该文件显示并允许我编辑设置。但是其中一个设置是密码 - 我希望它在字段中显示星号而不是密码设置的纯文本值。
该字段在保存时将被加密,但我希望它的行为类似于正常的密码输入框,当用户输入密码时会显示星号。
我想知道是否有可以应用于设置属性的属性将其标记为密码?
感谢。
答案 0 :(得分:26)
从.Net 2开始,您可以使用附加到密码属性的PasswordPropertyTextAttribute。
希望这有帮助。
答案 1 :(得分:1)
我认为你不能让PropertyGrid换成星号,但你也许可以使用单向类型转换器和模态编辑器......就像这样:
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"}
}
}
});
}
}
答案 2 :(得分:1)
这是我过去所做的。它为网格中的密码显示“********”,并带有“...”按钮,允许用户设置密码(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;
}
}