Question

我需要在其RowTemplateSelector中获取GridControl的行数，以便基于该数字更改行模板。我正在尝试使用传递给TemplateSelector的Select（）方法的容器字段。

Answer 1

您不需要conatiner对象-从DX文档中检出this示例：

public class RowTemplateSelector : DataTemplateSelector
{
    public DataTemplate EvenRowTemplate { get; set; }
    public DataTemplate OddRowTemplate { get; set; }
    public override DataTemplate SelectTemplate(object item, DependencyObject container) {

        RowData row = item as RowData; //<= mind this line of code!!!!

        if (row != null)
            return row.EvenRow ? EvenRowTemplate : OddRowTemplate;
        return base.SelectTemplate(item, container);
    }
}

使用RowData对象，您可以访问相应的View对象

DataViewBase view = row.View;

使用视图对象，您可以访问相应的网格对象

DataControlBase grid = view.DataControl;

有权访问DataControl意味着您有权访问其项源

object o = grid.ItemsSource;

从那里开始，转换并计算您的ItemsSource的实际类型即可。以下TemplateSelector根据项目计数是小于还是大于十而返回不同的模板：

public class RowTemplateSelector : DataTemplateSelector
{
    public DataTemplate SmallerThenTenTemplate { get; set; }
    public DataTemplate BiggerThenTenTemplate { get; set; }
    public override DataTemplate SelectTemplate(object item, DependencyObject container)
    {
        RowData row = item as RowData; //<= mind this line of code!!!!
        object itemSource = row.View.DataControl.ItemsSource;
        IEnumerable<YourModelType> sourceList = (IEnumerable<YourModelType>)itemSource;

        if (sourceList.Count() > 10)
            return BiggerThenTenTemplate;
        else
            return SmallerThenTenTemplate;
    }
}

如何获取行模板选择器中的行数-WPF-gridcontrol

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