C# 使用visual studio 2012在WPF中验证文本框

我是WPF新手，我需要为我的三个文本框获取验证。我尝试过，但未能成功。请帮助我获取所需的代码。请建议我在哪里进行更改和更正以获取验证

<Label  Content="ID :" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="26" Width="27"/>
<Label  Content="Name :" HorizontalAlignment="Left" Margin="10,60,0,0" VerticalAlignment="Top" Height="26" Width="48"/>
<Label  Content="Salary :" HorizontalAlignment="Left" Margin="10,110,0,0" VerticalAlignment="Top" Height="26" Width="47"/>

<TextBox Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Id, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True,UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="100" />

<TextBox Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Name, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>
<TextBox Name="tb3" HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Salary, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>

<Button Content="Get" HorizontalAlignment="Left" Margin="10,190,0,0" VerticalAlignment="Top" Width="75" Click="Get_Click" />
<Button Content="Add" HorizontalAlignment="Left" Margin="10,230,0,0" VerticalAlignment="Top" Width="75" Click="Add_Click" />
<Button Content="Delete" HorizontalAlignment="Left" Margin="10,270,0,0" VerticalAlignment="Top" Width="75" Click="Delete_Click" />

这是我的Xaml代码

<Window x:Class="DataGrid_DataBinding.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="IDDATA" Height="350" Width="525">

<Label  Content="ID :" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="26" Width="27"/>
<Label  Content="Name :" HorizontalAlignment="Left" Margin="10,60,0,0" VerticalAlignment="Top" Height="26" Width="48"/>
<Label  Content="Salary :" HorizontalAlignment="Left" Margin="10,110,0,0" VerticalAlignment="Top" Height="26" Width="47"/>

<TextBox Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Id, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True,UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="100" />

<TextBox Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Name, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>
<TextBox Name="tb3" HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Salary, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>

<Button Content="Get" HorizontalAlignment="Left" Margin="10,190,0,0" VerticalAlignment="Top" Width="75" Click="Get_Click" />
<Button Content="Add" HorizontalAlignment="Left" Margin="10,230,0,0" VerticalAlignment="Top" Width="75" Click="Add_Click" />
<Button Content="Delete" HorizontalAlignment="Left" Margin="10,270,0,0" VerticalAlignment="Top" Width="75" Click="Delete_Click" />

<Label  Content="ID :" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="26" Width="27"/>
<Label  Content="Name :" HorizontalAlignment="Left" Margin="10,60,0,0" VerticalAlignment="Top" Height="26" Width="48"/>
<Label  Content="Salary :" HorizontalAlignment="Left" Margin="10,110,0,0" VerticalAlignment="Top" Height="26" Width="47"/>

<TextBox Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Id, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True,UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="100" />

<TextBox Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Name, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>
<TextBox Name="tb3" HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Salary, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>

<Button Content="Get" HorizontalAlignment="Left" Margin="10,190,0,0" VerticalAlignment="Top" Width="75" Click="Get_Click" />
<Button Content="Add" HorizontalAlignment="Left" Margin="10,230,0,0" VerticalAlignment="Top" Width="75" Click="Add_Click" />
<Button Content="Delete" HorizontalAlignment="Left" Margin="10,270,0,0" VerticalAlignment="Top" Width="75" Click="Delete_Click" />

<Label  Content="ID :" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="26" Width="27"/>
<Label  Content="Name :" HorizontalAlignment="Left" Margin="10,60,0,0" VerticalAlignment="Top" Height="26" Width="48"/>
<Label  Content="Salary :" HorizontalAlignment="Left" Margin="10,110,0,0" VerticalAlignment="Top" Height="26" Width="47"/>

<TextBox Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Id, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True,UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="100" />

<TextBox Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Name, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>
<TextBox Name="tb3" HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Salary, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>

<Button Content="Get" HorizontalAlignment="Left" Margin="10,190,0,0" VerticalAlignment="Top" Width="75" Click="Get_Click" />
<Button Content="Add" HorizontalAlignment="Left" Margin="10,230,0,0" VerticalAlignment="Top" Width="75" Click="Add_Click" />
<Button Content="Delete" HorizontalAlignment="Left" Margin="10,270,0,0" VerticalAlignment="Top" Width="75" Click="Delete_Click" />

这是.cs代码

<Label  Content="ID :" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="26" Width="27"/>
<Label  Content="Name :" HorizontalAlignment="Left" Margin="10,60,0,0" VerticalAlignment="Top" Height="26" Width="48"/>
<Label  Content="Salary :" HorizontalAlignment="Left" Margin="10,110,0,0" VerticalAlignment="Top" Height="26" Width="47"/>

<TextBox Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Id, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True,UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="100" />

<TextBox Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Name, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>
<TextBox Name="tb3" HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Salary, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>

<Button Content="Get" HorizontalAlignment="Left" Margin="10,190,0,0" VerticalAlignment="Top" Width="75" Click="Get_Click" />
<Button Content="Add" HorizontalAlignment="Left" Margin="10,230,0,0" VerticalAlignment="Top" Width="75" Click="Add_Click" />
<Button Content="Delete" HorizontalAlignment="Left" Margin="10,270,0,0" VerticalAlignment="Top" Width="75" Click="Delete_Click" />

 public partial class MainWindow : Window
{

ObservableCollection<User> Users = new ObservableCollection<User>();
public MainWindow()
{
    InitializeComponent();

    Users.Add(new User() { Id = 101, Name = "allen", Salary = 10 });
    Users.Add(new User() { Id = 102, Name = "scott", Salary = 20 });
    Users.Add(new User() { Id = 103, Name = "mickey", Salary = 30 });
    Users.Add(new User() { Id = 104, Name = "micheal", Salary = 40 });
    Users.Add(new User() { Id = 105, Name = "fletch", Salary = 50 });
    Users.Add(new User() { Id = 106, Name = "etcher", Salary = 60 });

    dgsample.ItemsSource = Users;

}
private void DG1_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
    switch (e.Column.Header.ToString())
    {
        case "Id":

            e.Column.Visibility = Visibility.Hidden;
            break;
        case "Name":
            e.Column.Visibility = Visibility.Hidden;
            break;
        case "Salary":
            e.Column.Visibility = Visibility.Hidden;
            break;
    }
}

private void Get_Click(object sender, RoutedEventArgs e)
{


    int index;
    if (int.TryParse(this.tb1.Text, out index))
    {
        User currentUser = Users.FirstOrDefault(Select => Select.Id == int.Parse(tb1.Text));
        if (currentUser != null)
        {
            this.tb2.Text = currentUser.Name;
            this.tb3.Text = currentUser.Salary.ToString();
        }
        else
            MessageBox.Show("User with the provided ID does not Exist", "Error");
    }
    else
        MessageBox.Show("ID entered is not valid number", "Error");





}



private void Add_Click(object sender, RoutedEventArgs e)
{


    if (!tb1.Text.Equals(""))
    {
        var adduser = Users.Where(User => User.Id == int.Parse(tb1.Text));

        if (!adduser.Any())
        {
            Users.Add(new User() { Id = int.Parse(tb1.Text), Name = tb2.Text, Salary = int.Parse(tb3.Text) });
        }

        else

            MessageBox.Show("Someone already has that ID.");

    }

}

private void Delete_Click(object sender, RoutedEventArgs e)
{
    int index;
    if (int.TryParse(this.tb1.Text, out index))
    {
        User currentUser = Users.FirstOrDefault(Select => Select.Id == int.Parse(tb1.Text));
        if (currentUser != null)
        {
            Users.Remove(currentUser);
        }
        else
            MessageBox.Show("User with the provided ID does not Exist", "Error");
    }
    else
        MessageBox.Show("ID entered is not valid number", "Error");

}

公共部分类主窗口：窗口
{
ObservableCollection用户=新的ObservableCollection（）；
公共主窗口（）
{
初始化组件（）；
添加（新用户（）{Id=101，Name=“allen”，Salary=10}）；
添加（新用户（）{Id=102，Name=“scott”，Salary=20}）；
添加（新用户（）{Id=103，Name=“mickey”，Salary=30}）；
添加（新用户（）{Id=104，Name=“micheal”，Salary=40}）；
添加（新用户（）{Id=105，Name=“fletch”，Salary=50}）；
添加（新用户（）{Id=106，Name=“etcher”，Salary=60}）；
dgsample.ItemsSource=用户；
}
私有void DG1_AutoGeneratingColumn（对象发送方，DataGridAutoGeneratingColumnEventArgs e）
{
开关（例如Column.Header.ToString（））
{
案例“Id”：
e、 Column.Visibility=Visibility.Hidden；
打破
案例“名称”：
e、 Column.Visibility=Visibility.Hidden；
打破
案例“工资”：
e、 Column.Visibility=Visibility.Hidden；
打破
}
}
私有void Get_Click（对象发送方，路由目标）
{
整数指数；
if（int.TryParse（this.tb1.Text，out索引））
{
User currentUser=Users.FirstOrDefault（Select=>Select.Id==int.Parse（tb1.Text））；
如果（currentUser！=null）
{
this.tb2.Text=currentUser.Name；
this.tb3.Text=currentUser.Salary.ToString（）；
}
其他的
Show（“提供ID的用户不存在”，“错误”）；
}
其他的
MessageBox.Show（“输入的ID不是有效的数字”，“错误”）；
}
私有无效添加\单击（对象发送者，路由目标）
{
如果（！tb1.Text.Equals（“”）
{
var adduser=Users.Where（User=>User.Id==int.Parse（tb1.Text））；
如果（！adduser.Any（））
{
Add（newuser（）{Id=int.Parse（tb1.Text），Name=tb2.Text，Salary=int.Parse（tb3.Text）}）；
}
其他的
Show（“某人已经拥有该ID”）；
}
}
私有无效删除\单击（对象发送者，路由目标）
{
整数指数；
if（int.TryParse（this.tb1.Text，out索引））
{
User currentUser=Users.FirstOrDefault（Select=>Select.Id==int.Parse（tb1.Text））；
如果（currentUser！=null）
{
删除（当前用户）；
}
其他的
Show（“提供ID的用户不存在”，“错误”）；
}
其他的
MessageBox.Show（“输入的ID不是有效的数字”，“错误”）；
}

这似乎与您在此处发布的相同问题重复

<Label  Content="ID :" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="26" Width="27"/>
<Label  Content="Name :" HorizontalAlignment="Left" Margin="10,60,0,0" VerticalAlignment="Top" Height="26" Width="48"/>
<Label  Content="Salary :" HorizontalAlignment="Left" Margin="10,110,0,0" VerticalAlignment="Top" Height="26" Width="47"/>

<TextBox Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Id, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True,UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="100" />

<TextBox Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Name, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>
<TextBox Name="tb3" HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Salary, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>

<Button Content="Get" HorizontalAlignment="Left" Margin="10,190,0,0" VerticalAlignment="Top" Width="75" Click="Get_Click" />
<Button Content="Add" HorizontalAlignment="Left" Margin="10,230,0,0" VerticalAlignment="Top" Width="75" Click="Add_Click" />
<Button Content="Delete" HorizontalAlignment="Left" Margin="10,270,0,0" VerticalAlignment="Top" Width="75" Click="Delete_Click" />

你试过我建议你解决的方法了吗。 这很简单，只需尝试复制并粘贴整个代码并运行它。

---

我只添加了一个文本框来显示对用户输入的数据的验证。您可以在应用程序中模拟相同的逻辑。

我只是自己重新尝试运行解决方案，效果非常好。您能否更详细地说明什么不起作用？您是否有任何错误（编译/运行时）？？您正在看到异常，因为您正在抛出异常以验证输入的数据。当您将从应用程序集运行应用程序而不是从VS运行应用程序时，这不是问题。是的，您只需将鼠标悬停在工具提示中显示的文本框上，就可以看到UI本身的错误。如果您想在某些ot中显示按照她的方式，你可以随时更新模板样式。默认情况下，当我执行它时，文本框中显示0。我如何删除它？你可以使用Null或String初始化属性。在声明时为空，你在与文本框绑定时使用该声明。无需为此编写任何代码…你共享你的代码，我将检查并编辑相同的代码。i assume您的文本框绑定到用户对象（SelectedItem）——如果是这样，您的用户对象应该实现INotifyDataErrorInfo

<Label  Content="ID :" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="26" Width="27"/>
<Label  Content="Name :" HorizontalAlignment="Left" Margin="10,60,0,0" VerticalAlignment="Top" Height="26" Width="48"/>
<Label  Content="Salary :" HorizontalAlignment="Left" Margin="10,110,0,0" VerticalAlignment="Top" Height="26" Width="47"/>

<TextBox Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Id, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True,UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="100" />

<TextBox Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Name, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>
<TextBox Name="tb3" HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap" Text="{Binding SelectedItem.Salary, ElementName=dgsample,ValidatesOnNotifyDataErrors=True,ValidatesOnExceptions=True,NotifyOnValidationError=True}" VerticalAlignment="Top" Width="100"/>

<Button Content="Get" HorizontalAlignment="Left" Margin="10,190,0,0" VerticalAlignment="Top" Width="75" Click="Get_Click" />
<Button Content="Add" HorizontalAlignment="Left" Margin="10,230,0,0" VerticalAlignment="Top" Width="75" Click="Add_Click" />
<Button Content="Delete" HorizontalAlignment="Left" Margin="10,270,0,0" VerticalAlignment="Top" Width="75" Click="Delete_Click" />