Question

搜索时我发现，行号可以很容易地设置为RowHeader：

void datagrid_LoadingRow(object sender, DataGridRowEventArgs e) 
{ 
     e.Row.Header = e.Row.GetIndex(); 
}

它在RowHeader中设置行号。但我想将行号显示在第一列

任何人都可以帮助我如何实现这一目标？感谢

Answer 1

可能有一种更简单的方法可以做到这一点，但我通过在DataGridRow类上使用GetIndex（）方法来实现它。这会将索引返回到数据源，因此可能与您完全不同。

enter image description here

xaml

  <Window x:Class="WpfApplication1.MainWindow"
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            xmlns:sys="clr-namespace:System;assembly=mscorlib"
            xmlns:local="clr-namespace:WpfApplication1"
            Title="MainWindow" Height="350" Width="525">
        <DataGrid>
            <DataGrid.Columns>
                <DataGridTextColumn Binding="{Binding RelativeSource={RelativeSource AncestorType=DataGridRow}, Converter={local:RowToIndexConverter}}" />
            </DataGrid.Columns>
            <DataGrid.Items>
                <sys:String>a</sys:String>
                <sys:String>b</sys:String>
                <sys:String>c</sys:String>
                <sys:String>d</sys:String>
                <sys:String>e</sys:String>
            </DataGrid.Items>
        </DataGrid>
    </Window>

和转换器。

public class RowToIndexConverter : MarkupExtension, IValueConverter
{
    static RowToIndexConverter converter;

    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        DataGridRow row = value as DataGridRow;
        if (row != null)
            return row.GetIndex();
        else
            return -1;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (converter == null) converter = new RowToIndexConverter();
        return converter;
    }

    public RowToIndexConverter()
    {
    }
}

Answer 2

我使用了Andys示例，但我需要从后面的代码中使用它，所以他是我的代码，以防万一有人想要像google搜索一样有点荒谬。

C＃

    DataGrid dataGrid = new DataGrid();

    DataGridTextColumn column0 = new DataGridTextColumn();
    column0.Header = "#";

    Binding bindingColumn0 = new Binding();
    bindingColumn0.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(DataGridRow), 1);
    bindingColumn0.Converter = new RowToIndexConvertor();

    column0.Binding = bindingColumn0;

    dataGrid.Columns.Add(column0);

Andy的转换器，刚刚添加return row.GetIndex() - 1;以1开始计数，而不是0。

public class RowToIndexConvertor : MarkupExtension, IValueConverter
{
    static RowToIndexConvertor convertor;

    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        DataGridRow row = value as DataGridRow;

        if (row != null)
        {
            return row.GetIndex() + 1;
        }
        else
        {
            return -1;
        }
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (convertor == null)
        {
            convertor = new RowToIndexConvertor();
        }

        return convertor;
    }


    public RowToIndexConvertor()
    {

    }
}

也不要忘记使用

using System;
using System.Windows.Data;
using System.Windows.Controls;
using System.Windows.Markup;

如何在WPF Datagrid的第一列中显示行号

2 个答案: