IDataErrorInfo 多 Validation.ErrorTemplate
IDateErrorInfo Multi Validation.ErrorTemplate
我已经对我的自定义控件 ViewModel
实施了 IDataErrorInfo
。一切正常(边框被绘制为红色,带有错误的工具提示正在显示),但我想知道是否有办法为错误和警告设置两个不同的 Validation.ErrorTemplate
s。
我的自定义控件样式(带有Validation.ErrorTemplate)
<Style TargetType="{x:Type controls:CustomTextBoxNumeric}">
<Setter Property="TextAlignment" Value="Right"/>
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<DockPanel LastChildFill="True">
<Border BorderBrush="Red" BorderThickness="1">
<AdornedElementPlaceholder />
</Border>
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="true">
<Setter Property="ToolTip"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(Validation.Errors).CurrentItem.ErrorContent}"/>
</Trigger>
</Style.Triggers>
</Style>
我的自定义控件 ViewModel(INotifyPropertyChanged 在基础 ViewModel 中实现)
public class CustomTextBoxNumericViewModel : BaseComponentViewModel, IDataErrorInfo
{
private decimal? decimalValue;
private bool hasErrors;
private bool hasWarnings;
public CustomTextBoxNumericViewModel()
{
}
[DataMember(EmitDefaultValue = false)]
public decimal? DecimalValue
{
get { return this.decimalValue; }
set { this.decimalValue = value; this.Changed("DecimalValue"); this.Changed("HasErrors"); }
}
[DataMember(EmitDefaultValue = false)]
public bool HasErrors
{
get { return this.hasErrors; }
set { this.hasErrors = value; this.Changed("HasErrors"); this.Changed("DecimalValue"); }
}
[DataMember(EmitDefaultValue = false)]
public bool HasWarnings
{
get { return this.hasWarnings; }
set { this.hasWarnings = value; this.Changed("HasWarnings"); this.Changed("DecimalValue"); }
}
#region IDataErrorInfo Implementation
public string Error
{
get
{
throw new NotImplementedException();
}
}
public string this[string propertyName]
{
get
{
if (propertyName == "DecimalValue")
{
if (HasErrors)
{
return this.ErrorsField;
}
if (HasWarnings)
{
return this.WarningsField;
}
if (DecimalValue < 0)
{
return "Must be greater than 0";
}
}
return string.Empty;
}
}
#endregion
}
我设法使用 ControlTemplate
资源解决了我的问题。
我的风格改为:
<Style TargetType="{x:Type controls:CustomTextBoxNumeric}">
<Setter Property="TextAlignment" Value="Right"/>
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<DockPanel LastChildFill="True">
<Border BorderBrush="Red" BorderThickness="1">
<AdornedElementPlaceholder />
</Border>
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="true">
<Setter Property="ToolTip"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(Validation.Errors).CurrentItem.ErrorContent}"/>
</Trigger>
<DataTrigger Binding="{Binding Path=ViewModel.HasWarnings, RelativeSource={RelativeSource Self}}" Value="True">
<Setter Property="Validation.ErrorTemplate" Value="{DynamicResource EntypoWarningTemplate}" />
</DataTrigger>
<DataTrigger Binding="{Binding Path=ViewModel.HasErrors, RelativeSource={RelativeSource Self}}" Value="True">
<Setter Property="Validation.ErrorTemplate" Value="{DynamicResource EntypoErrorTemplate}" />
</DataTrigger>
</Style.Triggers>
</Style>
ControlTemplates
:
<ControlTemplate x:Key="MyErrorTemplate" TargetType="{x:Type Control}">
<DockPanel LastChildFill="True">
<Border BorderBrush="Red" BorderThickness="1">
<AdornedElementPlaceholder />
</Border>
</DockPanel>
</ControlTemplate>
<ControlTemplate x:Key="MyWarningTemplate" TargetType="{x:Type Control}">
<DockPanel LastChildFill="True">
<Border BorderBrush="Orange" BorderThickness="1">
<AdornedElementPlaceholder />
</Border>
</DockPanel>
</ControlTemplate>
我已经对我的自定义控件 ViewModel
实施了 IDataErrorInfo
。一切正常(边框被绘制为红色,带有错误的工具提示正在显示),但我想知道是否有办法为错误和警告设置两个不同的 Validation.ErrorTemplate
s。
我的自定义控件样式(带有Validation.ErrorTemplate)
<Style TargetType="{x:Type controls:CustomTextBoxNumeric}">
<Setter Property="TextAlignment" Value="Right"/>
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<DockPanel LastChildFill="True">
<Border BorderBrush="Red" BorderThickness="1">
<AdornedElementPlaceholder />
</Border>
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="true">
<Setter Property="ToolTip"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(Validation.Errors).CurrentItem.ErrorContent}"/>
</Trigger>
</Style.Triggers>
</Style>
我的自定义控件 ViewModel(INotifyPropertyChanged 在基础 ViewModel 中实现)
public class CustomTextBoxNumericViewModel : BaseComponentViewModel, IDataErrorInfo
{
private decimal? decimalValue;
private bool hasErrors;
private bool hasWarnings;
public CustomTextBoxNumericViewModel()
{
}
[DataMember(EmitDefaultValue = false)]
public decimal? DecimalValue
{
get { return this.decimalValue; }
set { this.decimalValue = value; this.Changed("DecimalValue"); this.Changed("HasErrors"); }
}
[DataMember(EmitDefaultValue = false)]
public bool HasErrors
{
get { return this.hasErrors; }
set { this.hasErrors = value; this.Changed("HasErrors"); this.Changed("DecimalValue"); }
}
[DataMember(EmitDefaultValue = false)]
public bool HasWarnings
{
get { return this.hasWarnings; }
set { this.hasWarnings = value; this.Changed("HasWarnings"); this.Changed("DecimalValue"); }
}
#region IDataErrorInfo Implementation
public string Error
{
get
{
throw new NotImplementedException();
}
}
public string this[string propertyName]
{
get
{
if (propertyName == "DecimalValue")
{
if (HasErrors)
{
return this.ErrorsField;
}
if (HasWarnings)
{
return this.WarningsField;
}
if (DecimalValue < 0)
{
return "Must be greater than 0";
}
}
return string.Empty;
}
}
#endregion
}
我设法使用 ControlTemplate
资源解决了我的问题。
我的风格改为:
<Style TargetType="{x:Type controls:CustomTextBoxNumeric}">
<Setter Property="TextAlignment" Value="Right"/>
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<DockPanel LastChildFill="True">
<Border BorderBrush="Red" BorderThickness="1">
<AdornedElementPlaceholder />
</Border>
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="true">
<Setter Property="ToolTip"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(Validation.Errors).CurrentItem.ErrorContent}"/>
</Trigger>
<DataTrigger Binding="{Binding Path=ViewModel.HasWarnings, RelativeSource={RelativeSource Self}}" Value="True">
<Setter Property="Validation.ErrorTemplate" Value="{DynamicResource EntypoWarningTemplate}" />
</DataTrigger>
<DataTrigger Binding="{Binding Path=ViewModel.HasErrors, RelativeSource={RelativeSource Self}}" Value="True">
<Setter Property="Validation.ErrorTemplate" Value="{DynamicResource EntypoErrorTemplate}" />
</DataTrigger>
</Style.Triggers>
</Style>
ControlTemplates
:
<ControlTemplate x:Key="MyErrorTemplate" TargetType="{x:Type Control}">
<DockPanel LastChildFill="True">
<Border BorderBrush="Red" BorderThickness="1">
<AdornedElementPlaceholder />
</Border>
</DockPanel>
</ControlTemplate>
<ControlTemplate x:Key="MyWarningTemplate" TargetType="{x:Type Control}">
<DockPanel LastChildFill="True">
<Border BorderBrush="Orange" BorderThickness="1">
<AdornedElementPlaceholder />
</Border>
</DockPanel>
</ControlTemplate>