我正在寻找一个用于 WinRT 的 MaskedTextBox，我似乎找不到任何...有人知道这样的文本框是否存在吗？
我从 ComponentOne 找到了一个，但那个是付费的，我正在寻找免费的解决方案。
如果有人知道 Silverlight 或 Windows 桌面的开源解决方案不像超过 2000 行代码，我愿意研究它并尝试将其转换为 WinRT。
【问题讨论】：
标签： c# wpf xaml microsoft-metro winrt-xaml
我使用 behavior 而不是 maskedtextbox 控件。但老实说，我不知道这是否适用于 WinRT
编辑：这是我的最新版本
public class TextBoxInputMaskBehavior : Behavior<TextBox>
{
private WeakPropertyChangeNotifier _notifier;
#region DependencyProperties
public static readonly DependencyProperty InputMaskProperty =
DependencyProperty.Register("InputMask", typeof(string), typeof(TextBoxInputMaskBehavior), null);
public string InputMask
{
get { return (string)GetValue(InputMaskProperty); }
set { SetValue(InputMaskProperty, value); }
}
public static readonly DependencyProperty PromptCharProperty =
DependencyProperty.Register("PromptChar", typeof(char), typeof(TextBoxInputMaskBehavior), new PropertyMetadata('_'));
public char PromptChar
{
get { return (char)GetValue(PromptCharProperty); }
set { SetValue(PromptCharProperty, value); }
}
public static readonly DependencyProperty ResetOnSpaceProperty =
DependencyProperty.Register("ResetOnSpace", typeof(bool), typeof(TextBoxInputMaskBehavior), new PropertyMetadata(false));
public bool ResetOnSpace
{
get { return (bool)GetValue(ResetOnSpaceProperty); }
set { SetValue(ResetOnSpaceProperty, value); }
}
#endregion
public MaskedTextProvider Provider { get; private set; }
public TextBoxInputMaskBehavior()
{
//defaults
}
protected override void OnAttached()
{
base.OnAttached();
AssociatedObject.Loaded += AssociatedObjectLoaded;
AssociatedObject.PreviewTextInput += AssociatedObjectPreviewTextInput;
AssociatedObject.PreviewKeyDown += AssociatedObjectPreviewKeyDown;
DataObject.AddPastingHandler(AssociatedObject, Pasting);
}
protected override void OnDetaching()
{
base.OnDetaching();
AssociatedObject.Loaded -= AssociatedObjectLoaded;
AssociatedObject.PreviewTextInput -= AssociatedObjectPreviewTextInput;
AssociatedObject.PreviewKeyDown -= AssociatedObjectPreviewKeyDown;
DataObject.RemovePastingHandler(AssociatedObject, Pasting);
}
/*
Mask Character Accepts Required?
0 Digit (0-9) Required
9 Digit (0-9) or space Optional
# Digit (0-9) or space Required
L Letter (a-z, A-Z) Required
? Letter (a-z, A-Z) Optional
& Any character Required
C Any character Optional
A Alphanumeric (0-9, a-z, A-Z) Required
a Alphanumeric (0-9, a-z, A-Z) Optional
Space separator Required
. Decimal separator Required
, Group (thousands) separator Required
: Time separator Required
/ Date separator Required
$ Currency symbol Required
In addition, the following characters have special meaning:
Mask Character Meaning
< All subsequent characters are converted to lower case
> All subsequent characters are converted to upper case
| Terminates a previous < or >
\ Escape: treat the next character in the mask as literal text rather than a mask symbol
*/
void AssociatedObjectLoaded(object sender, System.Windows.RoutedEventArgs e)
{
this.Provider = new MaskedTextProvider(InputMask, CultureInfo.CurrentCulture);
this.Provider.PromptChar = this.PromptChar;
this.Provider.SkipLiterals = true;
this.Provider.ResetOnSpace = this.ResetOnSpace;
this.Provider.Set(AssociatedObject.Text);
AssociatedObject.Text = GetProviderText();
//seems the only way that the text is formatted correct, when source is updated
//AddValueChanged for TextProperty in a weak manner
this._notifier = new WeakPropertyChangeNotifier(this.AssociatedObject, TextBox.TextProperty);
this._notifier.ValueChanged += new EventHandler(this.UpdateText);
}
void AssociatedObjectPreviewTextInput(object sender, System.Windows.Input.TextCompositionEventArgs e)
{
e.Handled = true;
this.TreatSelectedText();
var position = this.GetNextCharacterPosition(AssociatedObject.CaretIndex);
if (Keyboard.IsKeyToggled(Key.Insert))
{
if(!this.Provider.Replace(e.Text, position))
{
System.Media.SystemSounds.Beep.Play();
return;
}
}
else
{
if(!this.Provider.InsertAt(e.Text, position))
{
System.Media.SystemSounds.Beep.Play();
return;
}
}
var nextposition = this.GetNextCharacterPosition(position + 1);
this.RefreshText(nextposition);
}
void AssociatedObjectPreviewKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Space)//handle the space
{
e.Handled = true;
this.TreatSelectedText();
var position = this.GetNextCharacterPosition(AssociatedObject.CaretIndex);
if (!this.Provider.InsertAt(" ", position))
{
System.Media.SystemSounds.Beep.Play();
return;
}
this.RefreshText(AssociatedObject.CaretIndex + 1);
}
if (e.Key == Key.Back && AssociatedObject.CaretIndex > 0)//handle the back space
{
e.Handled = true;
//wenn etwas markiert war und der nutzer Backspace klickt soll nur das markierte verschwinden
if(this.TreatSelectedText())
{
this.RefreshText(AssociatedObject.CaretIndex);
return;
}
var denDavor = AssociatedObject.CaretIndex - 1;
if(this.Provider.IsEditPosition(denDavor))
{
if (!this.Provider.RemoveAt(denDavor))
{
System.Media.SystemSounds.Beep.Play();
return;
}
}
this.RefreshText(AssociatedObject.CaretIndex - 1);
}
if (e.Key == Key.Delete)//handle the delete key
{
e.Handled = true;
//wenn etwas markiert war und der nutzer Delete klickt soll nur das markierte verschwinden
if (this.TreatSelectedText())
{
this.RefreshText(AssociatedObject.CaretIndex);
return;
}
var position = AssociatedObject.CaretIndex;
if (this.Provider.IsEditPosition(position))
{
if (!this.Provider.RemoveAt(position))
{
System.Media.SystemSounds.Beep.Play();
return;
}
}
else
{
System.Media.SystemSounds.Beep.Play();
return;
}
this.RefreshText(AssociatedObject.CaretIndex);
}
}
/// <summary>
/// Pasting prüft ob korrekte Daten reingepastet werden
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Pasting(object sender, DataObjectPastingEventArgs e)
{
if (e.DataObject.GetDataPresent(typeof(string)))
{
var pastedText = (string)e.DataObject.GetData(typeof(string));
this.TreatSelectedText();
var position = GetNextCharacterPosition(AssociatedObject.CaretIndex);
if (!this.Provider.InsertAt(pastedText, position))
{
System.Media.SystemSounds.Beep.Play();
}
else
{
this.RefreshText(position);
}
}
e.CancelCommand();
}
private void UpdateText(object sender, EventArgs eventArgs)
{
//check Provider.Text + TextBox.Text
if (this.Provider.ToDisplayString().Equals(AssociatedObject.Text))
return;
//use provider to format
var success = this.Provider.Set(AssociatedObject.Text);
//ui and mvvm/codebehind should be in sync
this.SetText(success ? GetProviderText() : AssociatedObject.Text);
}
/// <summary>
/// Falls eine Textauswahl vorliegt wird diese entsprechend behandelt.
/// </summary>
/// <returns>true Textauswahl behandelt wurde, ansonsten falls </returns>
private bool TreatSelectedText()
{
if (AssociatedObject.SelectionLength > 0)
{
this.Provider.RemoveAt(AssociatedObject.SelectionStart, AssociatedObject.SelectionStart + AssociatedObject.SelectionLength - 1);
return true;
}
return false;
}
private void RefreshText(int position)
{
SetText(GetProviderText());
AssociatedObject.CaretIndex = position;
}
private void SetText(string text)
{
AssociatedObject.Text = String.IsNullOrWhiteSpace(text) ? String.Empty : text;
}
private int GetNextCharacterPosition(int caretIndex)
{
var start = caretIndex;
var position = this.Provider.FindEditPositionFrom(start, true);
if (position == -1)
return start;
else
return position;
}
private string GetProviderText()
{
//wenn noch gar kein Zeichen eingeben wurde, soll auch nix drin stehen
//könnte man noch anpassen wenn man masken in der Oberfläche vllt doch haben will bei nem leeren feld
return this.Provider.AssignedEditPositionCount > 0
? this.Provider.ToDisplayString()
: this.Provider.ToString(false, false);
}
}
【讨论】：