C# 如何通过tabcontrol tabitem selection change重新更新文本框验证
在将实体保存到数据库之前,我必须验证一些属性 问题:C# 如何通过tabcontrol tabitem selection change重新更新文本框验证,c#,wpf,prism,C#,Wpf,Prism,在将实体保存到数据库之前,我必须验证一些属性 问题: <Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:prism
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem>
<TabItem.Content>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
using System.ComponentModel.DataAnnotations;
using Prism.Mvvm;
using Prism.Validation;
namespace PrismUnityApp1TestValidation.ViewModels
{
public class MainWindowViewModel : ValidatableBindableBase
{
private string _title = "Prism Unity Application";
public string Title
{
get { return _title; }
set { SetProperty(ref _title, value); }
}
private string _testtext;
[Required]
public string TestText
{
get { return _testtext; }
set { SetProperty(ref _testtext, value); }
}
public MainWindowViewModel()
{
}
}
}
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem IsSelected="{Binding TabItem1Selected}">
<TabItem.Content>
<AdornerDecorator>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</AdornerDecorator>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem>
<TabItem.Content>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
using System.ComponentModel.DataAnnotations;
using Prism.Mvvm;
using Prism.Validation;
namespace PrismUnityApp1TestValidation.ViewModels
{
public class MainWindowViewModel : ValidatableBindableBase
{
private string _title = "Prism Unity Application";
public string Title
{
get { return _title; }
set { SetProperty(ref _title, value); }
}
private string _testtext;
[Required]
public string TestText
{
get { return _testtext; }
set { SetProperty(ref _testtext, value); }
}
public MainWindowViewModel()
{
}
}
}
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem IsSelected="{Binding TabItem1Selected}">
<TabItem.Content>
<AdornerDecorator>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</AdornerDecorator>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
如果用户更改所选选项卡项,则每次也应显示验证错误
使用的工具/框架:
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem>
<TabItem.Content>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
using System.ComponentModel.DataAnnotations;
using Prism.Mvvm;
using Prism.Validation;
namespace PrismUnityApp1TestValidation.ViewModels
{
public class MainWindowViewModel : ValidatableBindableBase
{
private string _title = "Prism Unity Application";
public string Title
{
get { return _title; }
set { SetProperty(ref _title, value); }
}
private string _testtext;
[Required]
public string TestText
{
get { return _testtext; }
set { SetProperty(ref _testtext, value); }
}
public MainWindowViewModel()
{
}
}
}
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem IsSelected="{Binding TabItem1Selected}">
<TabItem.Content>
<AdornerDecorator>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</AdornerDecorator>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem>
<TabItem.Content>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
using System.ComponentModel.DataAnnotations;
using Prism.Mvvm;
using Prism.Validation;
namespace PrismUnityApp1TestValidation.ViewModels
{
public class MainWindowViewModel : ValidatableBindableBase
{
private string _title = "Prism Unity Application";
public string Title
{
get { return _title; }
set { SetProperty(ref _title, value); }
}
private string _testtext;
[Required]
public string TestText
{
get { return _testtext; }
set { SetProperty(ref _testtext, value); }
}
public MainWindowViewModel()
{
}
}
}
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem IsSelected="{Binding TabItem1Selected}">
<TabItem.Content>
<AdornerDecorator>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</AdornerDecorator>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem>
<TabItem.Content>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
using System.ComponentModel.DataAnnotations;
using Prism.Mvvm;
using Prism.Validation;
namespace PrismUnityApp1TestValidation.ViewModels
{
public class MainWindowViewModel : ValidatableBindableBase
{
private string _title = "Prism Unity Application";
public string Title
{
get { return _title; }
set { SetProperty(ref _title, value); }
}
private string _testtext;
[Required]
public string TestText
{
get { return _testtext; }
set { SetProperty(ref _testtext, value); }
}
public MainWindowViewModel()
{
}
}
}
<Window x:Class="PrismUnityApp1TestValidation.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="350" Width="525">
<StackPanel>
<!--<ContentControl prism:RegionManager.RegionName="ContentRegion" />-->
<TabControl>
<TabItem IsSelected="{Binding TabItem1Selected}">
<TabItem.Content>
<AdornerDecorator>
<TextBox Height="50" Text="{Binding TestText, ValidatesOnDataErrors=True, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></TextBox>
</AdornerDecorator>
</TabItem.Content>
</TabItem>
<TabItem>
<TabItem.Content>
<TextBlock Text="TabItem2"></TextBlock>
</TabItem.Content>
</TabItem>
</TabControl>
</StackPanel>
</Window>
ValidatableBindableBase(NugetPackage Prism.Validation):
namespace Prism.Validation
{
///
///创建IValidatableBindableBase接口是为了为包含验证规则的模型类添加验证支持。
///IValidatableBindableBase的默认实现是ValidatableBindableBase类,它包含运行
///实例,并将此验证的结果作为属性错误列表返回。
///
//有关验证用户输入的文档位于http://go.microsoft.com/fwlink/?LinkID=288817&clcid=0x409
公共类ValidatableBindableBase:BindableBase、IValidatableBindableBase、INotifyDataErrorInfo
{
私有只读BindableValidator\u BindableValidator;
///
///初始化类的新实例。
///
公共ValidatableBindableBase()
{
_bindableValidator=新的bindableValidator(此);
}
///
///获取或设置一个值,该值指示此实例是否已启用验证。
///
///
///如果为此实例启用了验证,则为true;否则为false。
///
已启用公共布尔值验证
{
获取{return}bindableValidator.IsValidationEnabled;}
设置{u bindableValidator.IsValidationEnabled=value;}
}
///
///返回具有索引器属性的BindableValidator实例。
///
///
///可绑定验证程序索引器属性。
///
公共BindableValidator错误
{
得到
{
返回bindableValidator;
}
}
///
///获取一个值,该值指示实体是否存在验证错误。
///
///
///如果此实例包含验证错误,则为true;否则为false。
///
公共布尔错误
{
得到
{
return!ValidateProperties();
}
}
///
///由于添加了新错误或修复了旧错误而更改错误集合时发生。
///
公共事件事件处理程序错误更改
{
添加{u bindableValidator.ErrorsChanged+=value;}
删除{u bindableValidator.ErrorsChanged-=value;}
}
///
///获取所有错误。
///
///ReadOnlyDictionary的键是属性名,值是错误字符串的只读集合。
public ReadOnlyDictionary GetAllErrors()
{
返回_bindablevalidater.GetAllErrors();
}
///
///验证当前实例的属性。
///
///
///如果所有属性都通过验证规则,则返回true;否则返回false。
///
公共bool ValidateProperties()
{
返回_bindablevidator.ValidateProperties();
}
///
///使用当前实例的给定名称验证单个属性。
///
///要验证的属性。
///如果属性通过验证规则,则返回true;否则返回false。
public bool ValidateProperty(字符串属性名称)
{
return!\u bindableValidator.IsValidationEnabled//如果禁用验证,请不要失败
||\u bindableValidator.ValidateProperty(propertyName);
}
///
///设置此实例的错误集合。
///
///实体错误。
公共无效设置错误(IDictionary entityErrors)
{
_bindableValidator.SetAllErrors(entityErrors);
}
///
///检查属性是否已与所需值匹配。设置属性并
///仅在必要时通知侦听器。我们将重写此属性以确保在
///确定性方法。
///
///属性的类型。
///对同时具有getter和setter的属性的引用。
///属性的所需值。
///用于通知侦听器的属性的名称。此
///值是可选的,可以在从以下编译器调用时自动提供:
///支持CallerMemberName。
///
///如果值已更改,则为True;如果现有值与
///期望值。
///
受保护的重写bool SetProperty(ref T storage,T value,[CallerMemberName]string propertyName=null)
{
var result=base.SetProperty(参考存储、值、属性名称);
if(result&!string.IsNullOrEmpty(propertyName))
{
if(_bindableValidator.IsValidationEnabled)
{
_bindableValidator.ValidatePro