Question

我注意到在编辑单元格后按 Enter 键，使用向右或向左箭头在单元格之间移动，或使用鼠标光标单击另一个单元格时，CellEndEdit会激活。当我使用鼠标单击时，出现以下错误：

操作无效，因为它会导致重新调用 SetCurrentCellAddressCore函数。

如果仅在按下Enter键时才能激活DataGridView的事件CellEndEdit？

Answer 1

您可以使用控件的KeyDown或KeyPress事件来检测按下了哪个键。示例（仅当您在datagridview中编辑更多内容时才会这样做）：

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
if (e.Control is DataGridViewTextBoxEditingControl tb)
        {
            tb.KeyDown -= dataGridView1_KeyDown;
            tb.KeyDown += dataGridView1_KeyDown;
        }
   }


private void dataGridView1_KeyDown(object sender, KeyEventArgs e)
{
 if (e.KeyData == Keys.Enter)
{
}
}

Answer 2

    protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {

        if (keyData == Keys.Enter)
        {
            dataGridView1.EndEdit();
            if (dataGridView1 != null &&
                dataGridView1.SelectedCells != null &&
                dataGridView1.CurrentCell != null)
            {
                if (!(dataGridView1.RowCount == 10 && AllRowCellsEntered(dataGridView1, 9)))
                {
                    bool allEntered = true;
                    int col = dataGridView1.CurrentCell.ColumnIndex;
                    int row = dataGridView1.CurrentCell.RowIndex;
                    dataGridView1.EndEdit();
                    //check if all values in the current row are entered
                    allEntered = AllRowCellsEntered(dataGridView1, row);
                    if (allEntered)
                    {
                        if (row == dataGridView1.Rows.Count - 1)
                        {
                            dataGridView1.Rows.Add(1);
                            dataGridView1.Rows[row].Cells[0].Value = row + 1;
                            dataGridView1.Rows[row + 1].Cells[0].Value = row + 2;
                            dataGridView1.Rows[row].ReadOnly = true;
                            dataGridView1[0, row + 1].ReadOnly = true;
                            dataGridView1.CurrentCell = dataGridView1.Rows[row + 1].Cells[1];
                            return true;
                        }
                        else 
                        {
                            dataGridView1.CurrentCell = dataGridView1[1, dataGridView1.Rows.Count - 1];
                            return base.ProcessCmdKey(ref msg, keyData);
                        }                                          

                    }
                    else if (col == dataGridView1.Columns.Count - 1)
                    {
                        MessageBox.Show("you are in the last cell and not all values are entered,\n enter all values please!");
                    }
                    else
                    {
                        dataGridView1.CurrentCell = dataGridView1[col + 1, row];
                    }
                }
            }
        }

        return base.ProcessCmdKey(ref msg, keyData);            
    }
    private bool AllRowCellsEntered(DataGridView dataGridView, int row)
    {
        bool allEntered = true;
        for (int i = 1; i < dataGridView.Columns.Count; i++)
        {
            if (dataGridView.Rows[row].Cells[i].Value != null)
            {
                int result;
                if (!(int.TryParse(dataGridView.Rows[row].Cells[i].Value.ToString(), out result)))
                {
                    allEntered = false;
                   // dataGridView.Rows[row].Cells[i].Value = "";
                    break;
                }
            }
            else
            {
                allEntered = false;
                break;
            }
        }
        return allEntered;
    }
    private void Form1_Load(object sender, EventArgs e)
    {
        dataGridView1.Rows.Add();
        dataGridView1[0, 0].Value = 1;
        dataGridView1[0, 0].ReadOnly = true;
        dataGridView1.CurrentCell = dataGridView1[1, 0];

    }
    private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
    {

        if ((dataGridView1.CurrentCell != null))
        {
            if ((dataGridView1.CurrentCell.Value != null))
            {
                string _cellValue = dataGridView1.CurrentCell.Value.ToString();
                int _parsedCellValue = 0;
                {
                    if (!(Int32.TryParse(_cellValue, out _parsedCellValue)))
                    {
                        dataGridView1.CurrentCell.Value = null;
                    }
                }
            }
        }
        if (dataGridView1.Rows.Count == 10)
        {
            if (AllRowCellsEntered(dataGridView1, dataGridView1.Rows.Count - 1))
            {
                dataGridView1.ReadOnly = true;
                MessageBox.Show("done!");
                // all data entered to datagridview do what do you want!
            }
        }

    }

我写了这个，解决了我的问题，但我不知道我感觉有点长。任何建议

在按下Enter键时触发DataGridView的CellEndEdit事件

2 个答案: