WPF自己喜欢用的数据验证方式

粘一个自己实践的例子

第一步：定义验证模型。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace DecorationMS.WindowsBase
{
 class DMSValidatiionRule
 {
 private const string emailPatten = @"^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$";
 private const string phonePatten = @"^\d{11}$";
 private const string nullablePhonePatten = @"^\w{0}$|^\d{11}$";
 private const string NOPatten = @"^\d+$";
 private const string fullChar = @"^[\u0000-\u00FF]*$";//半角
 //验证规则
 private string notEmty;
 private string mobilePhone;
 private string phoneNO;
 private string number;
 //
 public string NotEmty
 {
 get { return this.notEmty; }
 set
 {
 if (string.IsNullOrEmpty(value))
 {
 throw new ApplicationException("* 不能为空");
 }
 
 else
 {
 this.notEmty = value;
 }
 }
 }
 public string Number
 {
 get { return this.number; }
 set
 {

 if (!Regex.IsMatch(value, fullChar) || !Regex.IsMatch(value, NOPatten))
 {
 throw new ApplicationException(" * 需纯数字");
 }

 else
 {
 this.number = value;
 }

 }
 }
 public string MobilePhone
 {
 get { return this.mobilePhone; }
 set
 {

 if (!Regex.IsMatch(value, fullChar)||!Regex.IsMatch(value,phonePatten))
 {
 throw new ApplicationException("* 请输入11位半角纯数字");
 }

 else
 {
 this.mobilePhone = value;
 }
 
 }
 }
 public string PhoneNO
 {
 get { return this.phoneNO; }
 set
 {
 if (!Regex.IsMatch(value, fullChar) || !Regex.IsMatch(value, nullablePhonePatten))
 {
 throw new ApplicationException("* 请输入11位半角纯数字或留空");
 }

 else
 {
 this.phoneNO = value;
 }
 
 }
 }
 }
}

第二步：将验证模型引用到窗口的静态资源中

1. xmlns:DecorationMS="clr-namespace:DecorationMS.WindowsBase" 

2.　 <DecorationMS:DMSValidatiionRule x:Key="dmsValiations"/> 

第三步：将文本框的值绑定到静态资源，并要求验证规则

 <TextBox.Text>
                <Binding Source="{StaticResource dmsValiations}" Path="NotEmty">
                    <Binding.ValidationRules>
                        <ExceptionValidationRule/>
                    </Binding.ValidationRules>
                </Binding>
  </TextBox.Text>

至次，已次实现了基本的数据验证，接下来进一步完善

第四步，做个模板来显示错误提示

<ControlTemplate x:Key="errorTemp">
            <DockPanel>
                <AdornedElementPlaceholder Name="MyAdorner"/>
                <TextBlock Foreground="Red"  Text="{Binding ElementName=MyAdorner,Path=AdornedElement.(Validation.Errors)[0].ErrorContent}">
                </TextBlock>
            </DockPanel>
        </ControlTemplate>

第五步，给TextBox绑定模板，并将验效时机从失焦改为字符改变时动态验证

 １.Validation.ErrorTemplate="{StaticResource errorTemp}

２.NotifyOnValidationError="True" UpdateSourceTrigger="PropertyChanged"

致此XAML完整的代码如下：

<DecorationMS:DMSbase x:Class="DecorationMS.InfoAddWindows.AddPartnerWindow"
 xmlns:DecorationMS="clr-namespace:DecorationMS.WindowsBase" 
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
 <Window.Resources>
 
 <DecorationMS:DMSValidatiionRule x:Key="dmsValiations"/> 
 <ControlTemplate x:Key="errorTemp">
 <DockPanel>
 <AdornedElementPlaceholder Name="MyAdorner"/>
 <TextBlock Foreground="Red" Text="{Binding ElementName=MyAdorner,Path=AdornedElement.(Validation.Errors)[0].ErrorContent}">
 </TextBlock>
 </DockPanel>
 </ControlTemplate>
 </Window.Resources>

 <TextBox Name="tbName" Grid.Row="1" Grid.Column="1" HorizontalAlignment="Left" VerticalAlignment="Center" 
 Validation.ErrorTemplate="{StaticResource errorTemp}">
 <TextBox.Text>
 <Binding Source="{StaticResource dmsValiations}" Path="NotEmty" NotifyOnValidationError="True" UpdateSourceTrigger="PropertyChanged">
 <Binding.ValidationRules>
 <ExceptionValidationRule/>
 </Binding.ValidationRules>
 </Binding>

 </TextBox.Text>

第六步，在提交时再验证一次

 BindingExpression evenName = this.tbName.GetBindingExpression(TextBox.TextProperty);
 
 if (evenName.HasError)
 { MessageBox.Show(evenName.ValidationError.ErrorContent.ToString()); }

现在应该是全都完成，但再给一点建议：在窗口加载时设置一个reset程序,用以立即“激活”验证规则（textbox的值改变过了），否则会。。。。自己试试吧