c# - Getting value of cell in DataGrid in WPF

Question

For WinForms it's:

var value = DataGridView.Rows[0].Cells[0].Value

Is there any way to get it in WPF?

Answer 1

我认为最好的方法是使用 Items 属性并直接访问您的数据项：

var dataItem = dataGrid.Items[0] as ...;

但是您可以使用此类获取单元格并使用 GetValue() 方法访问值（更像您的示例）。

从这里获取的代码：datagrid get cell index

static class DataGridHelper {
    static public DataGridCell GetCell(DataGrid dg, int row, int column) {
        DataGridRow rowContainer = GetRow(dg, row);

        if (rowContainer != null) {
            DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);

            // try to get the cell but it may possibly be virtualized
            DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            if (cell == null) {
                // now try to bring into view and retreive the cell
                dg.ScrollIntoView(rowContainer, dg.Columns[column]);
                cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            }
            return cell;
        }
        return null;
    }

    static public DataGridRow GetRow(DataGrid dg, int index) {
        DataGridRow row = (DataGridRow)dg.ItemContainerGenerator.ContainerFromIndex(index);
        if (row == null) {
            // may be virtualized, bring into view and try again
            dg.ScrollIntoView(dg.Items[index]);
            row = (DataGridRow)dg.ItemContainerGenerator.ContainerFromIndex(index);
        }
        return row;
    }

    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;
    }
}

Answer 2

通常，您不需要这样做。在 WPF 中，datagrid 旨在与数据绑定一起使用，这意味着存在与单元格具有相同值的底层集合或对象，因此您需要直接访问该集合/对象。如果您需要访问单元格值，您可能需要重新考虑您的设计。