如何在DataGridTextColumn的工具提示中显示IDataErrorInfo的错误？ [英] How to display IDataErrorInfo's error in tooltip on DataGridTextColumn?

问题描述

 < Style TargetType = {x：Type TextBox}x：Key =TextBoxValidationStyle> 
< Style.Triggers> 
< Trigger Property =Validation.HasErrorValue =true> 
< Setter Property =ToolTip
 Value ={Binding RelativeSource = {RelativeSource Self}，
 Path =（Validation.Errors）[0] .ErrorContent}/> 
< / Trigger> 
< /Style.Triggers> 
< / Style> 
  

但它只适用于文本框，如何使用DataGridTextColumn做类似的事？

解决方案

只需使用 DataGridTextColumn.ElementStyle 和/或 DataGridTextColumn.EditingElementStyle ，例如：

 < DataGridTextColumn MinWidth =80...> 
< DataGridTextColumn.ElementStyle> 
< Style TargetType ={x：Type TextBlock}> 
< Style.Triggers> 
< Trigger Property =Validation.HasErrorValue =true> 
< Setter Property =ToolTip
 Value ={Binding RelativeSource = {RelativeSource Self}，
 Path =（Validation.Errors）[0] .ErrorContent}/> 
< / Trigger> 
< /Style.Triggers> 
< / Style> 
< /DataGridTextColumn.ElementStyle> 
< / DataGridTextColumn> 
  

With textbox, it works well when I put the following xml in App.xml :

    <Style TargetType="{x:Type TextBox}" x:Key="TextBoxValidationStyle">
        <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>

But it only works for textbox, how to do a similar thing with DataGridTextColumn ?

解决方案

Simply use DataGridTextColumn.ElementStyle and/or DataGridTextColumn.EditingElementStyle, for example:

<DataGridTextColumn MinWidth="80" ...>
    <DataGridTextColumn.ElementStyle>
    <Style TargetType="{x:Type TextBlock}">
            <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>
    </DataGridTextColumn.ElementStyle>
</DataGridTextColumn>

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