更改数据网格行单元格的颜色
本文关键字:单元格 颜色 网格 数据 数据网 | 更新日期: 2024-10-25 16:55:15
我有一个数据网格,通过将其绑定到数据表来填充。
有 100 行。
使用 c# 如何更改特定单元格的背景颜色?
例如,假设第 15 行和我想要的背景颜色是绿色。
数据网格
<DataGrid Name="grid" ItemsSource="{Binding}" Height="300" Width="900"
AutoGenerateColumns="True"
VerticalScrollBarVisibility="Disabled" HorizontalAlignment="Center" VerticalAlignment="Top" RowHeight="40">
<DataGrid.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Vertical" />
</ItemsPanelTemplate>
</DataGrid.ItemsPanel>
</DataGrid>
实际上,没有
访问 WPF 数据网格中单个行的方法,您不应该这样做!更好的方法是使用样式设置器
<Style TargetType="{x:Type DataGridCell}" x:Key="NumberCell">
<Style.Setters>
<Setter Property="Background" Value="{Binding backgroundColor></Setter>
</Style.Setters>
除非你不能这样做,否则还有其他选择:我前段时间在网上找到了这个解决方案,但不记得在哪里。
首先,我们需要一些辅助函数。只需添加此类
namespace YOURNAMESPACE.DataGridHelpers
/// <summary>
/// Extension methods for DataGrid
/// </summary>
public static class DataGridHelper
{
/// <summary>
/// Gets the visual child of an element
/// </summary>
/// <typeparam name="T">Expected type</typeparam>
/// <param name="parent">The parent of the expected element</param>
/// <returns>A visual child</returns>
public static T GetVisualChild<T>(Visual parent) where T : Visual
{
T child = default(T);
int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < numVisuals; i++)
{
Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
child = v as T;
if (child == null)
{
child = GetVisualChild<T>(v);
}
if (child != null)
{
break;
}
}
return child;
}
/// <summary>
/// Gets the specified cell of the DataGrid
/// </summary>
/// <param name="grid">The DataGrid instance</param>
/// <param name="row">The row of the cell</param>
/// <param name="column">The column index of the cell</param>
/// <returns>A cell of the DataGrid</returns>
public static DataGridCell GetCell(this DataGrid grid, DataGridRow row, int column)
{
if (row != null)
{
DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(row);
if (presenter == null)
{
grid.ScrollIntoView(row, grid.Columns[column]);
presenter = GetVisualChild<DataGridCellsPresenter>(row);
}
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
return cell;
}
return null;
}
/// <summary>
/// Gets the specified cell of the DataGrid
/// </summary>
/// <param name="grid">The DataGrid instance</param>
/// <param name="row">The row index of the cell</param>
/// <param name="column">The column index of the cell</param>
/// <returns>A cell of the DataGrid</returns>
public static DataGridCell GetCell(this DataGrid grid, int row, int column)
{
DataGridRow rowContainer = grid.GetRow(row);
return grid.GetCell(rowContainer, column);
}
/// <summary>
/// Gets the specified row of the DataGrid
/// </summary>
/// <param name="grid">The DataGrid instance</param>
/// <param name="index">The index of the row</param>
/// <returns>A row of the DataGrid</returns>
public static DataGridRow GetRow(this DataGrid grid, int index)
{
DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
if (row == null)
{
// May be virtualized, bring into view and try again.
grid.UpdateLayout();
grid.ScrollIntoView(grid.Items[index]);
row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
}
return row;
}
/// <summary>
/// Gets the selected row of the DataGrid
/// </summary>
/// <param name="grid">The DataGrid instance</param>
/// <returns></returns>
public static DataGridRow GetSelectedRow(this DataGrid grid)
{
return (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(grid.SelectedItem);
}
}
}
现在,您可以使用以下命令获取数据网格列0第15行:
var cell = dataGrid.GetCell( 15, 0);
并将颜色设置为绿色
cell.Background = Brushes.Green;
将处理程序添加到DataGrid
的LoadingRow
事件中,如下所示:
<DataGrid Name="grid" ItemsSource="{Binding}" Height="300" Width="900"
AutoGenerateColumns="True" VerticalAlignment="Top" RowHeight="40"
VerticalScrollBarVisibility="Disabled" HorizontalAlignment="Center"
LoadingRow="DataGrid_LoadingRow" >
<DataGrid.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Vertical" />
</ItemsPanelTemplate>
</DataGrid.ItemsPanel>
</DataGrid>
然后在后面的代码中:
int index = 0;
public void DataGrid_LoadingRow(object sender, DataGridRowEventArgs e)
{
var row = (DataRowView)e.Row.Item;
//If you want the content of a specific column of the current row
//var content = row.Row[0].ToString();
if (index == 15)
{
e.Row.Background = new SolidColorBrush(Colors.DeepSkyBlue);
e.Row.Foreground = new SolidColorBrush(Colors.Black);
}
index ++ ; //don't forget to increase the index
}