■ 바인딩 유효성 검사를 구현하는 방법을 보여준다.
▶ SampleData.cs
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namespace TestProject { /// <summary> /// 샘플 데이터 /// </summary> public class SampleData { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 나이 1 - Age1 /// <summary> /// 나이 1 /// </summary> public int Age1 { get; set; } #endregion #region 나이 2 - Age2 /// <summary> /// 나이 2 /// </summary> public int Age2 { get; set; } #endregion #region 나이 3 - Age3 /// <summary> /// 나이 3 /// </summary> public int Age3 { get; set; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - SampleData() /// <summary> /// 생성자 /// </summary> public SampleData() { Age1 = 0; Age2 = 0; } #endregion } } |
▶ AgeRangeRule.cs
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using System; using System.Globalization; using System.Windows.Controls; namespace TestProject { /// <summary> /// 나이 범위 규칙 /// </summary> public class AgeRangeRule : ValidationRule { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 최소 - Minimum /// <summary> /// 최소 /// </summary> public int Minimum { get; set; } #endregion #region 최대 - Maximum /// <summary> /// 최대 /// </summary> public int Maximum { get; set; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 검증하기 - Validate(value, cultureInfo) /// <summary> /// 검증하기 /// </summary> /// <param name="value">값</param> /// <param name="cultureInfo">문화 정보</param> /// <returns>검증 결과</returns> public override ValidationResult Validate(object value, CultureInfo cultureInfo) { int age = 0; try { if(((string)value).Length > 0) { age = int.Parse((string)value); } } catch(Exception exception) { return new ValidationResult(false, "Illegal characters or " + exception.Message); } if((age < Minimum) || (age > Maximum)) { return new ValidationResult(false, "Please enter an age in the range: " + Minimum + " - " + Maximum + "."); } return new ValidationResult(true, null); } #endregion } } |
▶ MainWindow.xaml
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<Window x:Class="TestProject.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:TestProject" Width="900" Height="600" Title="TestProject" FontFamily="나눔고딕코딩" FontSize="16"> <Window.Resources> <local:SampleData x:Key="SampleDataKey" /> <ControlTemplate x:Key="ValidationTemplateKey"> <DockPanel> <TextBlock Margin="0 5 0 0" Foreground="Red" FontWeight="Bold"> ! </TextBlock> <AdornedElementPlaceholder /> </DockPanel> </ControlTemplate> <Style x:Key="ErrorTextBoxStyleKey" TargetType="{x:Type TextBox}"> <Style.Triggers> <Trigger Property="Validation.HasError" Value="true"> <Setter Property="ToolTip" Value="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=(Validation.Errors)[0].ErrorContent}" /> </Trigger> </Style.Triggers> </Style> </Window.Resources> <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center"> <TextBlock Margin="10" FontSize="18" FontWeight="Bold" Text="Enter a number between 21-130 or there will be a validation error :" /> <StackPanel Orientation="Horizontal"> <Label Margin="20 0 0 0" Target="{Binding ElementName=textBox1}"> TextBox with _custom ErrorTemplate and ToolTip : </Label> <TextBox Name="textBox1" Style="{StaticResource ErrorTextBoxStyleKey}" Validation.ErrorTemplate="{StaticResource ValidationTemplateKey}" Margin="10 0 0 0" Width="50" Height="25" VerticalContentAlignment="Center"> <TextBox.Text> <Binding Source="{StaticResource SampleDataKey}" Path="Age1" UpdateSourceTrigger="PropertyChanged"> <Binding.ValidationRules> <local:AgeRangeRule Minimum="21" Maximum="130" /> </Binding.ValidationRules> </Binding> </TextBox.Text> </TextBox> </StackPanel> <StackPanel Orientation="Horizontal"> <Label Margin="20 0 0 0" Target="{Binding ElementName=textBox2}"> TextBox with _default ErrorTemplate : </Label> <TextBox Name="textBox2" Grid.Row="3" Grid.Column="1" Margin="10 0 0 0" Width="50" Height="25" VerticalContentAlignment="Center"> <TextBox.Text> <Binding Source="{StaticResource SampleDataKey}" Path="Age2" UpdateSourceTrigger="PropertyChanged"> <Binding.ValidationRules> <local:AgeRangeRule Minimum="21" Maximum="130" /> </Binding.ValidationRules> </Binding> </TextBox.Text> </TextBox> </StackPanel> <TextBlock Margin="10" FontSize="18" FontWeight="Bold" Text="The following TextBox uses the ExceptionValidationRule and UpdateSourceExceptionFilter handler :" /> <StackPanel Orientation="Horizontal"> <Label Margin="20 0 0 0" Target="{Binding ElementName=textBox3}"> TextBox with UpdateSourceExceptionFilter _handler : </Label> <TextBox Name="textBox3" Style="{StaticResource ErrorTextBoxStyleKey}" Margin="10 0 0 0" Width="50" Height="25" Validation.ErrorTemplate="{StaticResource ValidationTemplateKey}" VerticalContentAlignment="Center"> <TextBox.Text> <Binding Source="{StaticResource SampleDataKey}" Path="Age3" UpdateSourceTrigger="PropertyChanged"> <Binding.ValidationRules> <ExceptionValidationRule /> </Binding.ValidationRules> </Binding> </TextBox.Text> </TextBox> <CheckBox Name="checkBox" VerticalAlignment="Center" Margin="10 0 0 0"> Enable Custom Handler (see ToolTip) </CheckBox> </StackPanel> </StackPanel> </Window> |
▶ MainWindow.xaml.cs
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using System; using System.Windows; using System.Windows.Controls; using System.Windows.Data; namespace TestProject { /// <summary> /// 메인 윈도우 /// </summary> public partial class MainWindow : Window { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainWindow() /// <summary> /// 생성자 /// </summary> public MainWindow() { InitializeComponent(); this.checkBox.Checked += checkBox_Checked; this.checkBox.Unchecked += checkBox_Unchecked; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 체크 박스 체크시 처리하기 - checkBox_Checked(sender, e) /// <summary> /// 체크 박스 체크시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void checkBox_Checked(object sender, RoutedEventArgs e) { BindingExpression bindingExpression = this.textBox3.GetBindingExpression(TextBox.TextProperty); Binding parentBinding = bindingExpression.ParentBinding; parentBinding.UpdateSourceExceptionFilter = ReturnExceptionHandler; bindingExpression.UpdateSource(); } #endregion #region 체크 박스 체크 해제시 처리하기 - checkBox_Unchecked(sender, e) /// <summary> /// 체크 박스 체크 해제시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void checkBox_Unchecked(object sender, RoutedEventArgs e) { Binding binding = BindingOperations.GetBinding(this.textBox3, TextBox.TextProperty); binding.UpdateSourceExceptionFilter -= ReturnExceptionHandler; BindingExpression bindingExpression = BindingOperations.GetBindingExpression(this.textBox3, TextBox.TextProperty); bindingExpression.UpdateSource(); } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 예외 반환 핸들러 - ReturnExceptionHandler(bindingExpression, exception) /// <summary> /// 예외 반환 핸들러 /// </summary> /// <param name="bindingExpression">바인딩 표현식</param> /// <param name="exception">예외</param> /// <returns>처리 결과</returns> private object ReturnExceptionHandler(object bindingExpression, Exception exception) => "This is from the UpdateSourceExceptionFilterCallBack."; #endregion } } |
