我没有得到任何绑定错误,这段代码在另一个地方工作。我还没有发现我现在所做的与现在的代码不同,它不是那么多的代码。WPF错误模板没有显示
在UserControl.Resource:
<Style TargetType="TextBox">
<Setter Property="BorderBrush" Value="DarkBlue"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Margin" Value="0,1,0,1"/>
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<StackPanel Orientation="Horizontal">
<AdornedElementPlaceholder/>
<Grid Margin="2,0,0,0">
<Ellipse Width="20" Height="20" Fill="Red"/>
<TextBlock Foreground="White" Text="X" FontWeight="Bold"
HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid>
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="True">
<Setter Property="ToolTip"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(Validation.Errors)[0].ErrorContent}"/>
</Trigger>
</Style.Triggers>
</Style>
下面XAML中太:
<TextBlock Height="23" HorizontalAlignment="Left" Margin="22,90,0,0"
Text="Keywords" VerticalAlignment="Top"/>
<TextBox Height="23" HorizontalAlignment="Left" Margin="22,108,0,0"
VerticalAlignment="Top" Width="244">
<Binding Path="Tags" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged">
<Binding.ValidationRules>
<DataErrorValidationRule ValidatesOnTargetUpdated="False"/>
</Binding.ValidationRules>
</Binding>
</TextBox>
的按钮,在视图模型我时保存的Model.Tags
属性为长10个字符输入时,才会激活来自用户。当我输入10,11,然后返回8个字符时,按钮激活/禁用工作正常。所有的财产变化都被解雇了。
型号:
namespace TBM.Model
{
public class Document : EntityBase , IDataErrorInfo
{
public int Id { get; set; }
public string DocumentName { get; set; }
public string Tags { get; set; }
public byte[] DocumentData { get; set; }
public int PeriodId { get; set; }
string IDataErrorInfo.Error { get { return null; } }
string IDataErrorInfo.this[string propertyName]
{
get { return this.GetValidationError(propertyName); }
}
public bool IsValid
{
get
{
foreach (string property in ValidatedProperties)
if (GetValidationError(property) != null)
return false;
return true;
}
}
static readonly string[] ValidatedProperties = { "Tags", };
private string GetValidationError(string propertyName)
{
if (Array.IndexOf(ValidatedProperties, propertyName) < 0)
return null;
string error = null;
switch (propertyName)
{
case "Tags": error = this.IsTagsEmpty(Tags); break;
default:
Debug.Fail("Unexpected property being validated on Document: " + propertyName);
break;
}
return error;
}
private string IsTagsEmpty(string value)
{
if (value != null && value.Trim().Length >= 10)
return null;
else
return "The keywords must have at least 10 chars!";
}
}
}
视图模型:
public RelayCommand SaveDocumentCommand
{
get { return _saveDocumentCommand ?? (_saveDocumentCommand =
new RelayCommand(() => SaveDocument(),() => CanSaveDocument())); }
}
private bool CanSaveDocument()
{
return _document.IsValid;
}
//...
什么不起作用与红色椭圆ErrorTemplate没有显示呢?
更新:下面的代码恰好在TEST项目中起作用。但在我的生产性项目中,它找不到资源?为什么这个?
<TextBlock Height="23" HorizontalAlignment="Left" Margin="22,89,0,0"
Text="Keywords" VerticalAlignment="Top"/>
<TextBox Style="{StaticResource bla}" Height="23" HorizontalAlignment="Left"
Margin="22,109,0,0" VerticalAlignment="Top" Width="244">
<Binding Path="Tags" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged">
<Binding.ValidationRules>
<DataErrorValidationRule ValidatesOnTargetUpdated="False"
ValidationStep="UpdatedValue"/>
</Binding.ValidationRules>
</Binding>
</TextBox>
<UserControl.Resources>
<Style x:Name="bla" TargetType="TextBox">
<Setter Property="BorderBrush" Value="DarkBlue"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Margin" Value="0,1,0,1"/>
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<StackPanel Orientation="Horizontal">
<AdornedElementPlaceholder/>
<Grid Margin="2,0,0,0">
<Ellipse Width="20" Height="20" Fill="Red"/>
<TextBlock Foreground="White" Text="X" FontWeight="Bold"
HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid>
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="True">
<Setter Property="ToolTip"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(Validation.Errors)[0].ErrorContent}"/>
</Trigger>
</Style.Triggers>
</Style>
</UserControl.Resources>
验证总是返回我期望的值。因此该按钮被启用/禁用。 – Elisabeth 2010-10-26 07:26:03
我把你的代码放到一个用户控件中,并且IsEnabled属性绑定到IsValid,并且它一切都很完美。您是否尝试过在用户界面上运行snoop,以确保您没有与椭圆重叠的东西。有没有其他的TextBox风格过度?尝试将代码从您的项目中取出并存入测试应用程序,并确保它在那里工作。 – benPearce 2010-10-26 22:21:32
是的,我仍然想测试它在一个额外的项目中孤立。尽管我仍然在左侧留出了大约30像素的空间,但不可见......该死的也许是保证金...稍后再检查一下。 Ooooh snoop不喜欢它并不像预期的那样工作...... Afair没有其他文本框隐式样式或显式样式。我让你知道laters ... – Elisabeth 2010-10-27 10:49:34