DataGrid列中的Column / Row索引 [英] Column/Row index in a DataGrid column

问题描述

我希望以下内容能让我在单元格中的列索引：

 < DataGridTemplateColumn Header =Rec。No 。 Width =100IsReadOnly =True> 
< DataGridTemplateColumn.CellTemplate> 
< DataTemplate> 
< TextBlock Text ={Binding Source = {RelativeSource AncestorType = DataGridCell}，Path = Column.DisplayIndex}/> 
< / DataTemplate> 
< /DataGridTemplateColumn.CellTemplate> 
< / DataGridTemplateColumn> 
  

但它没有。任何人都可以告诉我这里有什么问题？

我实际上正在寻找行索引（需要我的网格中的记录编号栏），但是由于 DataGridRow 似乎没有一个索引类的属性，我试图首先为列索引，它有 DisplayIndex 。但是即使这样也不行。

解决方案

绑定语法不正确。而不是来源，它应该是 RelativeSource ：

  Text ={Binding RelativeSource = {RelativeSource AncestorType = DataGridCell}，
 Path = Column.DisplayIndex}
  

---

而为了获得 RowIndex 的第二个问题，没有内置的属性例如DataGridRow上的 RowIndex

我建议在底层数据类中绑定一些属性

但是，您也可以手动获取rowIndex，方法是使 IValueConverter 到位。

$ b $公共类RowIndexConverter：IValueConverter
{
公共对象转换（对象值，类型targetType，对象参数，
系统）b

全球化文化信息文化） 
 {
 DependencyObject item =（DependencyObject）value; 
 ItemsControl ic = ItemsControl.ItemsControlFromItemContainer（item）; 
 
 return ic.ItemContainerGenerator.IndexFromContainer（item）; 
 
 
公共对象ConvertBack（对象值，类型targetType，对象参数，
 System.Globalization.CultureInfo文化）
 {
 return Binding.DoNothing ; 
} 
} 
  

XAML： p>

 < TextBlock 
 Text ={Binding RelativeSource = {RelativeSource AncestorType = DataGridRow}，
 Converter = StaticResource RowIndexConverter}}/> 
  

当然，您需要在XAML的资源部分声明Converter的实例来使用它。 p>

I was hoping the following would get me column index in the cell:

<DataGridTemplateColumn Header="Rec. No." Width="100" IsReadOnly="True">
     <DataGridTemplateColumn.CellTemplate>
         <DataTemplate>
              <TextBlock Text="{Binding Source={RelativeSource AncestorType=DataGridCell}, Path=Column.DisplayIndex}" />
         </DataTemplate>
     </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

But it didn't. Anyone can tell me what's wrong here?

I'm actually looking for the row index (need a Record No. column in my grid), but since DataGridRow doesn't apparently have an "index" kind of property, I tried to first do it for column index, which has got DisplayIndex. But even this one doesn't work.

解决方案

Binding syntax is incorrect. Instead of Source, it should be RelativeSource:

Text="{Binding RelativeSource={RelativeSource AncestorType=DataGridCell}, 
               Path=Column.DisplayIndex}"

---

And for second problem for getting RowIndex, there is no inbuilt property such as RowIndex on DataGridRow.

I would suggest to have some property in underlying data class and bind to that.

However, you can get rowIndex manually as well by having IValueConverter in place.

public class RowIndexConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, 
                          System.Globalization.CultureInfo culture)
    {
        DependencyObject item = (DependencyObject)value;
        ItemsControl ic = ItemsControl.ItemsControlFromItemContainer(item);

        return ic.ItemContainerGenerator.IndexFromContainer(item);
    }

    public object ConvertBack(object value, Type targetType, object parameter, 
                              System.Globalization.CultureInfo culture)
    {
        return Binding.DoNothing;
    }
}

XAML:

<TextBlock
     Text="{Binding RelativeSource={RelativeSource AncestorType=DataGridRow}, 
                          Converter={StaticResource RowIndexConverter}}"/>

Ofcourse, you need to declare instance of Converter under resources section of your XAML to use that.

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