Question

我会尽力清楚..在这里我正在研究数据网格。在datagrid中，一列是可编辑的，因为我将DataGridTextColumn传递给它，并在用户向其输入数据并写回数据库时保存数据。我正在使用datagrid_celleditending事件保存到数据库，我也使用datagridcelleditendingeventargs来执行此操作。这样做并且工作正常。我已经添加了新的功能，这样用户不会在datagrid中输入数据，而是输入一个文本框，这个文本框将在datagrid上给出，并且输入数据到单元格我正在与datagrid单元格同步，我可以在其中查看数据（就像excel上面有一个大条，你可以在那里写数据，也可以在datagrid中看到）。我这样做是通过使用textbox_keyup事件。现在我想触发datagrid_celleditending事件args的事件。我尝试使用路由事件实现，但它无法正常工作。

希望我不要混淆，请帮助..

这是一大堆代码..

private void dataGrid_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
    {
        DataRowView rowView = e.Row.Item as DataRowView;
        rowBeingEdited = rowView;
        //Here my logic to write to database will come
        .........
        .........      
   }

//当我在datagrid中更改时，上面的事件工作正常我想在文本框中输入不是datagrid的一部分的数据时触发这个

   private void tb_Comments_KeyUp(object sender, KeyEventArgs e)
    {
        if (rowBeingEdited != null)
        {
            rowBeingEdited.Row["Comments"] = tb_Comments.Text;
           //here i wanted to go to the above event and fire it..how can i do it??
        }

     }

Answer 1

DataGrid的SelectionUnit设置为什么？这适用于SelectionUnit =“CellOrRowHeader”，否则最后必须稍微更改一些内容。无论如何，下面的代码将一个单元格置于编辑模式，然后提交它以激活CellEditEnding事件。

public void EnterCellEditEndingForCell(DataGridColumn column, DataRowView dataRowView)
{
    int selectedRowIndex = -1;
    // c_dataGrid.Items.IndexOf(dataRowView)
    // sometimes break and return -1.
    for (int i = 0; i < c_dataGrid.Items.Count; i++)
    {
        DataRowView rowView = c_dataGrid.Items[i] as DataRowView;
        if (rowView == dataRowView)
        {
            selectedRowIndex = i;
            break;
        }
    }
    int selectedColumnIndex = c_dataGrid.Columns.IndexOf(column);
    if (selectedRowIndex >= 0 && selectedColumnIndex >= 0)
    {
        DataGridCell dataGridCell = DataGridHelper.GetCell(c_dataGrid, selectedRowIndex, selectedColumnIndex);
        if (dataGridCell == null)
        {
            c_dataGrid.ScrollIntoView(dataRowView);
            dataGridCell = DataGridHelper.GetCell(c_dataGrid, selectedRowIndex, selectedColumnIndex);
        }
        dataGridCell.BringIntoView();
        dataGridCell.Focus();
        c_dataGrid.SelectedCells.Clear();
        DataGridCellInfo info = new DataGridCellInfo(dataGridCell);
        c_dataGrid.SelectedCells.Add(info);
        c_dataGrid.BeginEdit();
        c_dataGrid.CommitEdit(DataGridEditingUnit.Cell, true);
    }
}

DataGridHelper.cs，如果你没有它的实现

static class DataGridHelper
{
    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;
    }

    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;
    }
}

<强>更新如果您只选择了一个单元格（听起来像这样），那么就可以了。

private void tb_Comments_KeyUp(object sender, KeyEventArgs e) 
{ 
    if (rowBeingEdited != null) 
    { 
        rowBeingEdited.Row["Comments"] = tb_Comments.Text; 
        DataGridColumn columnBeingEdited= GetActiveDataGridColumn();
        EnterCellEditEndingForCell(columnBeingEdited, rowBeingEdited);
    } 
 } 

private DataGridColumn GetActiveDataGridColumn()
{
    if (c_dataGrid.SelectedCells.Count != 1)
    {
        return null;
    }
    return c_dataGrid.SelectedCells[0].Column;
}

从一个事件中解雇另一个事件

1 个答案: