如何获取行模板选择器中的行数 - wpf - gridcontrol

Question

我需要在其 RowTemplateSelect 中获取 GridControl 的行数，或者根据该数字更改行模板。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-object - 查看 DX-docs 中的 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-object可以访问对应的View-object

DataViewBase view = row.View;

使用View-object可以访问对应的Grid-object

DataControlBase grid = view.DataControl;

可以访问 DataControl 意味着您可以访问它的 item-source

object o = grid.ItemsSource;

接下来就是转换和计算 ItemsSource 的实际类型的问题。以下 TemplateSelector returns 不同的模板取决于 item-count 是小于还是大于十：

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

How to get the number of rows in a row template selector - wpf - gridcontrol

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