WPF中如实现TextBox的限制输入,该如何解决
WPF中如实现TextBox的限制输入
如何实现在键盘输入指定字符到TextBox中，条件是只能输入数字（0-9）和（#），（*），不能都进行外界复制粘贴到TextBox内
------解决思路----------------------
写个正则，在keypress事件中判断。
至于禁用复制，粘贴，应该有属性可以设置的。
------解决思路----------------------
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Text.RegularExpressions;
namespace cnpc.Dor.Bsc.Components.ProjectGroupReportPresentation.Utilities
{
public class TextBoxExtend : TextBox
{
/// <summary>
/// 未设置格式时默认用于整型
/// </summary>
private string intRegDefault = @"^[0-9]*$";
/// <summary>
/// 设置了格式字段时使用
/// </summary>
private string intReg = @"^\d{1,n}$";
/// <summary>
/// 未设置格式时默认用于小数
/// </summary>
private string decimalRegDefault = @"^\d+(\.\d+)?$";
/// <summary>
/// 设置了格式字段时小数使用
/// </summary>
private string decimalReg = @"^([-+]?\d{1,m})(\.\d{1,n})?$";
/// <summary>
/// 正则
/// </summary>
private Regex r;
int IntLength = 0;
int decimalLength = 0;
private string OrigenalValue = "";
bool isTextFirstSet = true; //OrigenalValue 是否已经设置过
private DependencyPropertyChangedListener dataCotextListener;
public TextBoxExtend()
: base()
{
IsTabStop = true;
dataCotextListener = DependencyPropertyChangedListener.Create(this, "DataContext");
dataCotextListener.ValueChanged += ResetBackColor;
}
protected override void OnKeyDown(KeyEventArgs e)
{
if (TextType == InputClass.Normal)
{
e.Handled = false;
base.OnKeyDown(e);
}
if (TextType == InputClass.Integer) //只能输入整数的情况
{
if ((e.Key >= Key.D0 && e.Key <= Key.D9)
------解决思路----------------------
(e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9)
)
{
if (Text == String.Empty)
{
e.Handled = false;
base.OnKeyDown(e);
}
else if (TextFormat != null && Text.TrimStart('0').Length == IntLength)
{
e.Handled = true;
}
else if (r.IsMatch(Text.TrimStart('0')))
{
e.Handled = false;
base.OnKeyDown(e);
}
else
{
e.Handled = true;
}
}
else if (e.Key == Key.Back
------解决思路----------------------
e.Key == Key.Delete
------解决思路----------------------
e.Key == Key.Left
------解决思路----------------------
e.Key == Key.Right
------解决思路----------------------
e.Key == Key.Tab
------解决思路----------------------
(e.Key == Key.V && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.C && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.X && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.Z && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
)
{
e.Handled = false;
base.OnKeyDown(e);
}
else
{
e.Handled = true;
}
}
if (TextType == InputClass.Decimal) //带小数的情况
{
if (e.PlatformKeyCode == 190
------解决思路----------------------
e.Key == Key.Decimal)
{
if (this.Text.Contains(".")
------解决思路----------------------
Text.Length == 0)
{
e.Handled = true;
}
else
{
e.Handled = false;
}
}
else if ((e.Key >= Key.D0 && e.Key <= Key.D9)
------解决思路----------------------
(e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9)
)
{
if (Text == String.Empty)
{
e.Handled = false;
base.OnKeyDown(e);
}
else if (Text.EndsWith(".")) //如果最后一个字符为 . 就先不用正则验证
{
e.Handled = false;
base.OnKeyDown(e);
}
else if (r.IsMatch(Text.TrimStart('0') + e.Key.ToString().Replace("NumPad", "").Replace("D",""))) //前面已0开头且整数有多位的情况
{
e.Handled = false;
base.OnKeyDown(e);
}
else if (r.IsMatch(Text.Trim() + e.Key.ToString().Replace("NumPad", "").Replace("D", "")))
{
e.Handled = false;
base.OnKeyDown(e);
}
else
{
e.Handled = true;
}
}
else if (e.Key == Key.Back
------解决思路----------------------
e.Key == Key.Delete
------解决思路----------------------
e.Key == Key.Left
------解决思路----------------------
e.Key == Key.Right
------解决思路----------------------
e.Key == Key.Tab
------解决思路----------------------
(e.Key == Key.V && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.C && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.X && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.Z && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
)
{
e.Handled = false;
base.OnKeyDown(e);
}
else
{
e.Handled = true;
}
}
}
protected override void OnLostFocus(RoutedEventArgs e)
{
if (IsRequired) // 是否必输项
{
if (TextType == InputClass.Decimal
------解决思路----------------------
TextType == InputClass.Integer)
{
if (this.Text.Trim() == ""
------解决思路----------------------
!this.r.IsMatch(this.Text.Trim().TrimStart('0')))
{
this.Text = "0";
}
}
if (TextType == InputClass.Normal)
{
if (Text.Trim() == String.Empty)
{
this.Background = ColorDefine.RequireColor;
}
else if (this.Background != ColorDefine.EditedColor && this.Background != ColorDefine.ErrorColor)
{
this.Background = ColorDefine.NormalColor;
}
}
base.OnLostFocus(e);
}
else
{
if (TextType == InputClass.Decimal
------解决思路----------------------
TextType == InputClass.Integer)
{
if (this.Text.Trim() != String.Empty
&& !this.r.IsMatch(this.Text.Trim().TrimStart('0')))
{
base.Text = "";
}
base.OnLostFocus(e);
}
}
if (this.AutoChangeColor)
{
if (OrigenalValue != Text)
{
Background = ColorDefine.EditedColor;
}
else
{
Background = ColorDefine.NormalColor;
}
base.OnLostFocus(e);
}
}
protected override void OnGotFocus(RoutedEventArgs e)
{
if (isTextFirstSet)
{
OrigenalValue = Text;
isTextFirstSet = false;
}
base.OnGotFocus(e);
}
public static readonly DependencyProperty InputTypeProperty =
DependencyProperty.Register("TextType", typeof(InputClass), typeof(TextBoxExtend), null);
/// <summary>
/// 文本类型，Normal：普通文本，Integer：整数，Decimal：带小数的数字
/// </summary>
public InputClass TextType
{
get { return (InputClass)GetValue(InputTypeProperty); }
set
{
if (value == InputClass.Decimal)
{
//默认设置不带格式
TextAlignment = System.Windows.TextAlignment.Right;
r = new Regex(decimalRegDefault);
}
else if (value == InputClass.Integer)
{
//默认设置不带格式
TextAlignment = System.Windows.TextAlignment.Right;
r = new Regex(intRegDefault);
}
SetValue(InputTypeProperty, value);
}
}
public static readonly DependencyProperty IsRequiredProperty =
DependencyProperty.Register("IsRequired", typeof(bool), typeof(TextBoxExtend), null);
/// <summary>
/// 是否必填项
/// </summary>
public bool IsRequired
{
get { return (bool)GetValue(IsRequiredProperty); }
set { SetValue(IsRequiredProperty, value); }
}
public static readonly DependencyProperty TextFormatProperty =
DependencyProperty.Register("TextFormat", typeof(string), typeof(TextBoxExtend), null);
/// <summary>
/// 整数或带小数数值时使用：####.##
/// </summary>
public string TextFormat
{
get { return (string)GetValue(TextFormatProperty); }
set
{
if (TextType == InputClass.Normal)
{
//throw new Exception("请先设置TextType属性！");
}
if (TextType == InputClass.Integer)
{
//设置正则表达式
IntLength = value.Length;
if (value != String.Empty)
{
intReg = intReg.Replace("n", (value.Length).ToString());
r = new Regex(intReg);
}
else
{
r = new Regex(decimalRegDefault);
}
}
else if (TextType == InputClass.Decimal)
{
string[] pars = value.Split('.');
//设置正则表达式
if (pars.Length != 2)
throw new FormatException("Format格式设置错误！TextType为Decimal时，必须有小数，例如：####.##");
else
{
IntLength = pars[0].Length;
decimalLength = pars[1].Length;
string reg = decimalReg.Replace("m", IntLength.ToString()).Replace("n", decimalLength.ToString());
r = new Regex(reg);
}
}
SetValue(TextFormatProperty, value);
}
}
private void ResetBackColor(object sender, DependencyPropertyValueChangedEventArgs e)
{
this.Background = ColorDefine.NormalColor;
isTextFirstSet = true;
if (isTextFirstSet)
{
OrigenalValue = Text;
isTextFirstSet = false;
}
}
public bool AutoChangeColor
{
get { return (bool)GetValue(AutoChangeColorProperty); }
set { SetValue(AutoChangeColorProperty, value); }
}
public static readonly DependencyProperty AutoChangeColorProperty =
DependencyProperty.Register("AutoChangeColor", typeof(bool), typeof(TextBoxExtend), null);
}
public enum InputClass
{
Normal = 0,
Integer = 1,
Decimal = 2,
}
}
如何实现在键盘输入指定字符到TextBox中，条件是只能输入数字（0-9）和（#），（*），不能都进行外界复制粘贴到TextBox内
------解决思路----------------------
写个正则，在keypress事件中判断。
至于禁用复制，粘贴，应该有属性可以设置的。
------解决思路----------------------
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Text.RegularExpressions;
namespace cnpc.Dor.Bsc.Components.ProjectGroupReportPresentation.Utilities
{
public class TextBoxExtend : TextBox
{
/// <summary>
/// 未设置格式时默认用于整型
/// </summary>
private string intRegDefault = @"^[0-9]*$";
/// <summary>
/// 设置了格式字段时使用
/// </summary>
private string intReg = @"^\d{1,n}$";
/// <summary>
/// 未设置格式时默认用于小数
/// </summary>
private string decimalRegDefault = @"^\d+(\.\d+)?$";
/// <summary>
/// 设置了格式字段时小数使用
/// </summary>
private string decimalReg = @"^([-+]?\d{1,m})(\.\d{1,n})?$";
/// <summary>
/// 正则
/// </summary>
private Regex r;
int IntLength = 0;
int decimalLength = 0;
private string OrigenalValue = "";
bool isTextFirstSet = true; //OrigenalValue 是否已经设置过
private DependencyPropertyChangedListener dataCotextListener;
public TextBoxExtend()
: base()
{
IsTabStop = true;
dataCotextListener = DependencyPropertyChangedListener.Create(this, "DataContext");
dataCotextListener.ValueChanged += ResetBackColor;
}
protected override void OnKeyDown(KeyEventArgs e)
{
if (TextType == InputClass.Normal)
{
e.Handled = false;
base.OnKeyDown(e);
}
if (TextType == InputClass.Integer) //只能输入整数的情况
{
if ((e.Key >= Key.D0 && e.Key <= Key.D9)
------解决思路----------------------
(e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9)
)
{
if (Text == String.Empty)
{
e.Handled = false;
base.OnKeyDown(e);
}
else if (TextFormat != null && Text.TrimStart('0').Length == IntLength)
{
e.Handled = true;
}
else if (r.IsMatch(Text.TrimStart('0')))
{
e.Handled = false;
base.OnKeyDown(e);
}
else
{
e.Handled = true;
}
}
else if (e.Key == Key.Back
------解决思路----------------------
e.Key == Key.Delete
------解决思路----------------------
e.Key == Key.Left
------解决思路----------------------
e.Key == Key.Right
------解决思路----------------------
e.Key == Key.Tab
------解决思路----------------------
(e.Key == Key.V && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.C && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.X && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.Z && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
)
{
e.Handled = false;
base.OnKeyDown(e);
}
else
{
e.Handled = true;
}
}
if (TextType == InputClass.Decimal) //带小数的情况
{
if (e.PlatformKeyCode == 190
------解决思路----------------------
e.Key == Key.Decimal)
{
if (this.Text.Contains(".")
------解决思路----------------------
Text.Length == 0)
{
e.Handled = true;
}
else
{
e.Handled = false;
}
}
else if ((e.Key >= Key.D0 && e.Key <= Key.D9)
------解决思路----------------------
(e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9)
)
{
if (Text == String.Empty)
{
e.Handled = false;
base.OnKeyDown(e);
}
else if (Text.EndsWith(".")) //如果最后一个字符为 . 就先不用正则验证
{
e.Handled = false;
base.OnKeyDown(e);
}
else if (r.IsMatch(Text.TrimStart('0') + e.Key.ToString().Replace("NumPad", "").Replace("D",""))) //前面已0开头且整数有多位的情况
{
e.Handled = false;
base.OnKeyDown(e);
}
else if (r.IsMatch(Text.Trim() + e.Key.ToString().Replace("NumPad", "").Replace("D", "")))
{
e.Handled = false;
base.OnKeyDown(e);
}
else
{
e.Handled = true;
}
}
else if (e.Key == Key.Back
------解决思路----------------------
e.Key == Key.Delete
------解决思路----------------------
e.Key == Key.Left
------解决思路----------------------
e.Key == Key.Right
------解决思路----------------------
e.Key == Key.Tab
------解决思路----------------------
(e.Key == Key.V && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.C && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.X && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
------解决思路----------------------
(e.Key == Key.Z && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control))
)
{
e.Handled = false;
base.OnKeyDown(e);
}
else
{
e.Handled = true;
}
}
}
protected override void OnLostFocus(RoutedEventArgs e)
{
if (IsRequired) // 是否必输项
{
if (TextType == InputClass.Decimal
------解决思路----------------------
TextType == InputClass.Integer)
{
if (this.Text.Trim() == ""
------解决思路----------------------
!this.r.IsMatch(this.Text.Trim().TrimStart('0')))
{
this.Text = "0";
}
}
if (TextType == InputClass.Normal)
{
if (Text.Trim() == String.Empty)
{
this.Background = ColorDefine.RequireColor;
}
else if (this.Background != ColorDefine.EditedColor && this.Background != ColorDefine.ErrorColor)
{
this.Background = ColorDefine.NormalColor;
}
}
base.OnLostFocus(e);
}
else
{
if (TextType == InputClass.Decimal
------解决思路----------------------
TextType == InputClass.Integer)
{
if (this.Text.Trim() != String.Empty
&& !this.r.IsMatch(this.Text.Trim().TrimStart('0')))
{
base.Text = "";
}
base.OnLostFocus(e);
}
}
if (this.AutoChangeColor)
{
if (OrigenalValue != Text)
{
Background = ColorDefine.EditedColor;
}
else
{
Background = ColorDefine.NormalColor;
}
base.OnLostFocus(e);
}
}
protected override void OnGotFocus(RoutedEventArgs e)
{
if (isTextFirstSet)
{
OrigenalValue = Text;
isTextFirstSet = false;
}
base.OnGotFocus(e);
}
public static readonly DependencyProperty InputTypeProperty =
DependencyProperty.Register("TextType", typeof(InputClass), typeof(TextBoxExtend), null);
/// <summary>
/// 文本类型，Normal：普通文本，Integer：整数，Decimal：带小数的数字
/// </summary>
public InputClass TextType
{
get { return (InputClass)GetValue(InputTypeProperty); }
set
{
if (value == InputClass.Decimal)
{
//默认设置不带格式
TextAlignment = System.Windows.TextAlignment.Right;
r = new Regex(decimalRegDefault);
}
else if (value == InputClass.Integer)
{
//默认设置不带格式
TextAlignment = System.Windows.TextAlignment.Right;
r = new Regex(intRegDefault);
}
SetValue(InputTypeProperty, value);
}
}
public static readonly DependencyProperty IsRequiredProperty =
DependencyProperty.Register("IsRequired", typeof(bool), typeof(TextBoxExtend), null);
/// <summary>
/// 是否必填项
/// </summary>
public bool IsRequired
{
get { return (bool)GetValue(IsRequiredProperty); }
set { SetValue(IsRequiredProperty, value); }
}
public static readonly DependencyProperty TextFormatProperty =
DependencyProperty.Register("TextFormat", typeof(string), typeof(TextBoxExtend), null);
/// <summary>
/// 整数或带小数数值时使用：####.##
/// </summary>
public string TextFormat
{
get { return (string)GetValue(TextFormatProperty); }
set
{
if (TextType == InputClass.Normal)
{
//throw new Exception("请先设置TextType属性！");
}
if (TextType == InputClass.Integer)
{
//设置正则表达式
IntLength = value.Length;
if (value != String.Empty)
{
intReg = intReg.Replace("n", (value.Length).ToString());
r = new Regex(intReg);
}
else
{
r = new Regex(decimalRegDefault);
}
}
else if (TextType == InputClass.Decimal)
{
string[] pars = value.Split('.');
//设置正则表达式
if (pars.Length != 2)
throw new FormatException("Format格式设置错误！TextType为Decimal时，必须有小数，例如：####.##");
else
{
IntLength = pars[0].Length;
decimalLength = pars[1].Length;
string reg = decimalReg.Replace("m", IntLength.ToString()).Replace("n", decimalLength.ToString());
r = new Regex(reg);
}
}
SetValue(TextFormatProperty, value);
}
}
private void ResetBackColor(object sender, DependencyPropertyValueChangedEventArgs e)
{
this.Background = ColorDefine.NormalColor;
isTextFirstSet = true;
if (isTextFirstSet)
{
OrigenalValue = Text;
isTextFirstSet = false;
}
}
public bool AutoChangeColor
{
get { return (bool)GetValue(AutoChangeColorProperty); }
set { SetValue(AutoChangeColorProperty, value); }
}
public static readonly DependencyProperty AutoChangeColorProperty =
DependencyProperty.Register("AutoChangeColor", typeof(bool), typeof(TextBoxExtend), null);
}
public enum InputClass
{
Normal = 0,
Integer = 1,
Decimal = 2,
}
}