在按鈕單擊驗證WPF

Question

我正在WPF應用程序。在我的應用程序中有保存數據的不同形式。我想在按鈕點擊或失去焦點時驗證數據。我想WPF驗證工作喜歡ASP.Net驗證。

我不知道頁面加載後表單生效。它應該僅在用戶失去焦點時或用戶單擊按鈕時進行驗證。

我在google上做了很多R & D.但我通過安裝解決方案發現了任何適當的設置。

請幫我一把。

Answer 1

在這個例子中，我向您展示與驗證兩個文本框...

XAML編碼......

<TextBlock Text="Throw Exception in Property" Grid.Column="1" Grid.Row="0" VerticalAlignment="Center" FontSize="22" Foreground="Chocolate" /> 
    <TextBlock Text="Name " Grid.Column="0" Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="15" Foreground="DarkGreen" /> 
    <TextBlock Text="Age" Grid.Column="0" Grid.Row="2" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="15" Foreground="DarkGreen" /> 

    <TextBox Name="txtName" Grid.Row="1" Grid.Column="2" HorizontalAlignment="Left" Width="170" Height="30" Background="Azure" Text="{Binding Path=pName,Mode=TwoWay,ValidatesOnExceptions=True}"/> 
    <TextBox Name="txtAge" Grid.Row="2" Grid.Column="2" HorizontalAlignment="Left" Width="170" Height="30" Background="Azure" Text="{Binding Path=pAge,Mode=TwoWay,ValidatesOnExceptions=True}"/> 
    <Button Name="btnSubmit" Content="Submit" Grid.Row="4" Height="30" Click="btnSubmit_Click"/> 

C＃編碼

private void Page_Loaded(object sender, RoutedEventArgs e) 
    { 
     Student s = new Student(); 
     this.DataContext = s; 
    } 

    public class Student : INotifyPropertyChanged 
    { 
     string name; 
     int age; 

     public string pName 
     { 
      get 
      { 
       return name; 
      } 

      set 
      { 
       if (string.IsNullOrWhiteSpace(value)) 
       { 
        throw new ArgumentException("Name field must be enterd."); 
       } 
       name = value; 
       OnPropertyChanged("pName"); 
      } 
     } 

     public int pAge 
     { 
      get 
      { 
       return age; 
      } 
      set 
      { 
       if(!Regex.IsMatch(value.ToString(),"[0-9]")) 
       { 
        throw new ArgumentException("Age field must be in number."); 
       } 

       if(value < 18 || value > 100) 
       { 
        throw new ArgumentException("Age field must be 18-100."); 
       } 

       age = value; 
       OnPropertyChanged("pAge"); 
      } 
     } 


     public event PropertyChangedEventHandler PropertyChanged; 

     public void OnPropertyChanged(string data) 
     { 
      if (PropertyChanged != null) 
      { 
       PropertyChanged(this,new PropertyChangedEventArgs(data)); 
      } 
     } 

    }