WPF mvvm Listbox datatemplate验证 [英] WPF mvvm Listbox datatemplate Validation

问题描述

我使用带有DataTemplate的ListBox。在列表框数据项的每一行中，它将具有 2 复选框（IS_Like_Apple，IS_Like_Orange）。关于如何在每行项目的 中写入验证的任何想法？ （必须至少 1 复选框 >）。任何人都有 的想法吗？ btw，i '  m使用mvvm。 
这是我的datatemplate代码..  

 <   DataTemplate     x：Key   =  ListDataTemplate >  
 <  网格    TextBlock.FontSize   =  15    Horizo​​ntalAlignment   = 左 >  
 <   Grid.ColumnDefinitions  >  
 <   ColumnDefinition    宽度  = 自动    SharedSizeGroup   =  ID  /  >  
 <   ColumnDefinition    宽度  = 自动    SharedSizeGroup   = 名称  /  >  
 <   ColumnDefinition    < span class =code-attribute>宽度  = 自动    SharedSizeGroup   = 电子邮件  /  >  
 <   ColumnDefinition    宽度  = 自动    SharedSizeGroup   =  Like_Apple  /  >  
 <   ColumnDefinition    宽度  = 自动    SharedSizeGroup   =  Like_Orange  /  >  
 <   / Grid.ColumnDefinitions  >  
 <   TextBlock     Grid.Column   =  0 < span class =code-attribute>    文字  =  {绑定路径= WWID}      /  >  
 <   TextBlock     Grid.Column   =  1     文本  =  {Binding Path = Name}      /   >  
 <   TextBlock     Grid.Column   =  2     文字  =  {Binding Path = Email}    /  >  
 <   CheckBox     Grid.Column   =  3      IsChecked   =  {Binding Path = IS_Like_Apple}  /  >  
 <   CheckBox     Grid.Column   = < span class =code-keyword> 4      IsChecked   =  {Binding Path = IS_Like_Orange}  /  >  
 <   / Grid  >  
 <   / DataTemplate  >  

解决方案

您好，DataTemplate代码还不够！

为社区提供您的MVVM模型，等等...



Fisrt我想到的事情是：

- 你的模型必须继承IDataErrorInfo接口

I am using a ListBox with a DataTemplate. in each row of listbox data items, it will have 2 checkbox (IS_Like_Apple, IS_Like_Orange). Any idea on how to write the validation on checkbox in each row of items? (Must be minimum 1 checkbox is selected). Anyone have an idea for it? btw,i'm using mvvm.
this is my datatemplate code..

<DataTemplate x:Key="ListDataTemplate">
        <Grid TextBlock.FontSize="15" HorizontalAlignment="Left">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" SharedSizeGroup="ID"/>
                <ColumnDefinition Width="Auto" SharedSizeGroup="Name"/>
                <ColumnDefinition Width="Auto" SharedSizeGroup="Email"/>
                <ColumnDefinition Width="Auto" SharedSizeGroup="Like_Apple"/>
                <ColumnDefinition Width="Auto" SharedSizeGroup="Like_Orange"/>
            </Grid.ColumnDefinitions>
            <TextBlock Grid.Column="0"  Text="{Binding  Path=WWID}"  />
            <TextBlock Grid.Column="1"  Text="{Binding  Path=Name}"  />
            <TextBlock Grid.Column="2"  Text="{Binding  Path=Email}" />
            <CheckBox Grid.Column="3"  IsChecked="{Binding Path=IS_Like_Apple}"/>
            <CheckBox Grid.Column="4"  IsChecked="{Binding Path=IS_Like_Orange}"/>
        </Grid>
    </DataTemplate>

解决方案

Hi, DataTemplate code is not enough!
Provide community with your MVVM model, and so on...

Fisrt thing that comes to my mind is:
- your model must to inherit IDataErrorInfo interface.

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