我正在开发 WPF 应用程序。在我的应用程序中,有不同的表格可以保存数据。我想在按钮单击或失去控制焦点时验证数据。我希望 WPF 验证像 ASP.Net 验证一样工作。
我不知道页面加载后表单验证。它应该仅在用户失去控制焦点或用户单击按钮时验证。
我在google上做了很多研发。但我确实通过设置解决方案找到了任何正确的设置。
请帮帮我。
问问题
1199 次
1 回答
-1
In this example I show you two text box with validation...
XAML Coding......
<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# Coding
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));
}
}
}
于 2013-04-17T19:30:33.313 回答