根据数据将多个Datatemplates应用于列表框Itemtemplate

Question

我确信这很简单,但我似乎无法弄清楚如何做到这一点.基本上我有一个来自天蓝色移动服务数据库的客户列表.到目前为止一切正常但我想根据数据为列表框中的每个项目设置项目模板.我有两个模板,一个用于公司,一个用于一个人.我的问题是如何应用每一个.

模板

<DataTemplate x:Key="CompanyItemTemplate">
    -------
</DataTemplate>

<DataTemplate x:Key="CustomerItemTemplate">
    -------
</DataTemplate>

码

CustomerListItems.ItemsSource = customeritems.OrderBy(customer => customer.CustomerName);

foreach (Customers customer in customeritems)
{
    if (customer.Company != "")
    {
        CustomerListItems.ItemTemplate = CompanyItemTemplate;
    }
    else
    {
        CustomerListItems.ItemTemplate = CustomerItemTemplate;
    }
}

Answer 1

您可以使用a 根据绑定到属性的数据DataTemplateSelector动态选择DataTemplate:

示例代码:

public class ImgStringTemplateSelector : DataTemplateSelector
{
  public DataTemplate ImageTemplate { get; set; }
  public DataTemplate StringTemplate { get; set; }

  public override DataTemplate SelectTemplate(object item, 
    DependencyObject container)
  {
    String path = (string)item;
    String ext = System.IO.Path.GetExtension(path);
    if (System.IO.File.Exists(path) && ext == ".jpg")
      return ImageTemplate;
    return StringTemplate;
  }
}

  <Window.Resources>
    <local:RelativeToAbsolutePathConverter x:Key="relToAbsPathConverter" />

    <DataTemplate x:Key="stringTemplate">
      <TextBlock Text="{Binding}"/>
    </DataTemplate>

    <DataTemplate x:Key="imageTemplate">
      <Image Source="{Binding Converter={StaticResource relToAbsPathConverter}}" 
             Stretch="UniformToFill" Width="200"/>
    </DataTemplate>

    <local:ImgStringTemplateSelector 
        ImageTemplate="{StaticResource imageTemplate}" 
        StringTemplate="{StaticResource stringTemplate}" 
        x:Key="imgStringTemplateSelector" />
  </Window.Resources>

  <Grid>
    <ListView ScrollViewer.CanContentScroll="False" 
              ItemsSource="{Binding ElementName=This, Path=PathCollection}" 
              ItemTemplateSelector="{StaticResource imgStringTemplateSelector}">
    </ListView>
  </Grid>
</Window>