文本框验证
- ValidationRules
<--文本框验证
引用资源
xmlns:XX="clr-namespace:XX;assembly=XX"
<TextBox>
<TextBox.Text>
<Binding Path="Config.Id" Mode="TwoWay" UpdateSourceTrigger="LostFocus" >
<Binding.ValidationRules>
<ExceptionValidationRule/>
<XX:InputValidationRule Type="NotEmpty"/>
<XX:InputValidationRule Type="NetID"/>
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.IO.Packaging;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Xml;
namespace XX
{/// <summary>
///
/// </summary>
public class InputValidationRule : ValidationRule
{
public ValidationTypeEnum Type { get; set; }
public int MaxLength { get; set; }
public override ValidationResult Validate(object value, CultureInfo cultureInfo)
{
string input = value as string;
switch (Type)
{
case ValidationTypeEnum.PositiveInteger:
if (!ValidationType.IsPositiveInteger(input))
return new ValidationResult(false, "必须为正整数");
else
return new ValidationResult(true, null);
case ValidationTypeEnum.StringLength:
if (!ValidationType.IsStringLengthValid(input, MaxLength))
return new ValidationResult(false, $"最大长度 {MaxLength} 个字符");
else
return new ValidationResult(true, null);
case ValidationTypeEnum.NoIllegalCharacters:
if (ValidationType.ContainsIllegalCharacters(input))
return new ValidationResult(false, "包含非法字符！\\ / : * ? \" < > |");
else
return new ValidationResult(true, null);
case ValidationTypeEnum.NotEmpty:
if (!ValidationType.IsNotEmpty(input))
return new ValidationResult(false, "不能为空");
else
return new ValidationResult(true, null);
case ValidationTypeEnum.NetID:
if (!ValidationType.IsNetIDValid(input))
return new ValidationResult(false, "NetID格式不正确,正确格式如:192.168.1.40.1.1");
else
return new ValidationResult(true, null);
case ValidationTypeEnum.PidPort:
if (!ValidationType.IsPortID(input))
return new ValidationResult(false, "端口格式不正确,端口范围为0-65535");
else
return new ValidationResult(true, null);
default:
throw new ArgumentOutOfRangeException();
}
return ValidationResult.ValidResult;
}
}
public static class ValidationType
{
public static char[] IllegalCharacters = { '\\', '/', ':', '*', '?', '"', '<', '>', '|' };
public static bool IsPositiveInteger(string input)
{
int value;
return int.TryParse(input, out value) && value > 0;
}
public static bool IsStringLengthValid(string input, int maxLength)
{
return !string.IsNullOrEmpty(input) && input.Length <= maxLength;
}
public static bool ContainsIllegalCharacters(string input)
{
return !string.IsNullOrEmpty(input) && input.Any(c => IllegalCharacters.Contains(c));
}
public static bool IsNotEmpty(string input)
{
return !string.IsNullOrEmpty(input);
}
public static bool IsNetIDValid(string input)
{
// 实现逻辑，判断是否是合法的 netid 格式
string[] segments = input.Split('.');
// netid 格式要求：共有 6 段，每段为正整数
if (segments.Length == 6)
{
foreach (var segment in segments)
{
int value;
if (!int.TryParse(segment, out value) || value < 0)
{
return false;
}
}
return true;
}
return false;
}
public static bool IsPortID(string input)
{
// 实现逻辑，判断是否是合法的端口号
int port;
return int.TryParse(input, out port) && port >= 0 && port <= 65535;
}
public static bool IsIpAddress(string input)
{
IPAddress iPAddress;
return IPAddress.TryParse(input, out iPAddress);
}
}
public enum ValidationTypeEnum
{
PositiveInteger,
StringLength,
NoIllegalCharacters,
NotEmpty,
NetID,
IP,
PidPort,
IpAddress
}
}2.直接设置禁用输入法，并添加PreviewTextInput事件，如果不满足条件，就禁止输入
<TextBox InputMethod.IsInputMethodEnabled="True" PreviewTextInput="TextBox_PreviewTextInput" Margin="10"/>using System.Text.RegularExpressions;
using System.Windows;
namespace wpfcore
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DataContext = this;
}
private void TextBox_PreviewTextInput(object sender, System.Windows.Input.TextCompositionEventArgs e)
{
e.Handled = new Regex("[^0-9]+").IsMatch(e.Text);
}
}
}3.附加属性
<TextBox local:TextBoxAttachedProperties.IsOnlyNumber="true" Margin="10"/>using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
namespace wpfcore
{
public class TextBoxAttachedProperties
{
public static bool GetIsOnlyNumber(DependencyObject obj)
{
return (bool)obj.GetValue(IsOnlyNumberProperty);
}
public static void SetIsOnlyNumber(DependencyObject obj, bool value)
{
obj.SetValue(IsOnlyNumberProperty, value);
}
public static readonly DependencyProperty IsOnlyNumberProperty =
DependencyProperty.RegisterAttached("IsOnlyNumber", typeof(bool), typeof(TextBox), new PropertyMetadata(false,
(s, e) =>
{
if (s is TextBox textBox)
{
textBox.SetValue(InputMethod.IsInputMethodEnabledProperty, !(bool)e.NewValue);
textBox.PreviewTextInput -= TxtInput;
if (!(bool)e.NewValue)
{
textBox.PreviewTextInput += TxtInput;
}
}
}));
private static void TxtInput(object sender, System.Windows.Input.TextCompositionEventArgs e)
{
e.Handled = new Regex("[^0-9]+").IsMatch(e.Text);
}
}
}
