从DataGrid中选择DataGridCell
本文关键字:DataGridCell 选择 DataGrid | 更新日期: 2023-09-27 18:29:48
我有一个DataGrid
WPF控件,我想获得一个特定的DataGridCell
。我知道行和列索引。我该怎么做?
我需要DataGridCell
,因为我必须访问它的内容。因此,如果我(例如)有一列DataGridTextColum
,我的Content将是一个TextBlock
对象。
您可以使用类似的代码来选择一个单元格:
var dataGridCellInfo = new DataGridCellInfo(
dataGrid.Items[rowNo], dataGrid.Columns[colNo]);
dataGrid.SelectedCells.Clear();
dataGrid.SelectedCells.Add(dataGridCellInfo);
dataGrid.CurrentCell = dataGridCellInfo;
我看不到直接更新特定单元格内容的方法,所以为了更新特定单元格的内容,我会执行以下
// gets the data item bound to the row that contains the current cell
// and casts to your data type.
var item = dataGrid.CurrentItem as MyDataItem;
if(item != null){
// update the property on your item associated with column 'n'
item.MyProperty = "new value";
}
// assuming your data item implements INotifyPropertyChanged the cell will be updated.
您可以简单地使用这个扩展方法-
public static DataGridRow GetSelectedRow(this DataGrid grid)
{
return (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(grid.SelectedItem);
}
您可以通过现有的行和列id:获得DataGrid的一个单元格
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;
}
grid.ScrollIntoView
是实现这一功能的关键,以防DataGrid被虚拟化,并且所需的单元格当前不在视图中。
查看此链接了解详细信息-获取WPF DataGrid行和单元格
这是我使用的代码:
/// <summary>
/// Get the cell of the datagrid.
/// </summary>
/// <param name="dataGrid">The data grid in question</param>
/// <param name="cellInfo">The cell information for a row of that datagrid</param>
/// <param name="cellIndex">The row index of the cell to find. </param>
/// <returns>The cell or null</returns>
private DataGridCell TryToFindGridCell(DataGrid dataGrid, DataGridCellInfo cellInfo, int cellIndex = -1)
{
DataGridRow row;
DataGridCell result = null;
if (dataGrid != null && cellInfo != null)
{
if (cellIndex < 0)
{
row = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(cellInfo.Item);
}
else
{
row = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(cellIndex);
}
if (row != null)
{
int columnIndex = dataGrid.Columns.IndexOf(cellInfo.Column);
if (columnIndex > -1)
{
DataGridCellsPresenter presenter = this.FindVisualChild<DataGridCellsPresenter>(row);
if (presenter != null)
{
result = presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex) as DataGridCell;
}
else
{
result = null;
}
}
}
}
return result;
}`
这假设DataGrid已经加载(执行其自己的loaded处理程序)。