在DataGridViewComboBoxColumn SelectedIndexChanged期间触发的事件

Question

我有DataGridView两个专栏.第一列是TextBoxCol(DataGridViewTextBoxColumn)第二列,第二列是ComboBoxCol(DataGridViewComboBoxColumn).

我怎样才能改变的值TextBoxCol时ComboBoxCol改变其选定的指标值？(这应该在选择的索引更改时发生ComboBoxCol.不是在离开列之后,如dataGridView_CellValueChanged)

我已经阅读了一个与我遇到的问题几乎相同的主题,但我不明白答案(根据复选标记应该是正确的).这是链接. - 几乎相同的主题

Answer 1

这个答案在几个地方浮动.使用DataGridViewEditingControlShowingEventHandler将触发比您想要的更多事件.在我的测试中,它多次触发了该事件.另外使用combo.SelectedIndexChanged - =事件不会真正删除事件,它们只是保持堆叠.无论如何,我找到了一个似乎有效的解决方案.我在下面包含一个代码示例:

// Add the events to listen for
dataGridView1.CellValueChanged += new DataGridViewCellEventHandler(dataGridView1_CellValueChanged);
dataGridView1.CurrentCellDirtyStateChanged += new EventHandler(dataGridView1_CurrentCellDirtyStateChanged);



// This event handler manually raises the CellValueChanged event 
// by calling the CommitEdit method. 
void dataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
    if (dataGridView1.IsCurrentCellDirty)
    {
        // This fires the cell value changed handler below
        dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
    }
}

private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
    // My combobox column is the second one so I hard coded a 1, flavor to taste
    DataGridViewComboBoxCell cb = (DataGridViewComboBoxCell)dataGridView1.Rows[e.RowIndex].Cells[1];
    if (cb.Value != null)
    {
         // do stuff
         dataGridView1.Invalidate();
    }
}

Answer 2

给出这两个简单的方法(top方法中的'1'是组合框列的索引)

您将修改的行将是setter行cel.Value =,因为您可以将其更改为您喜欢的任何内容.

    private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        if (dataGridView1.CurrentCell.ColumnIndex == 1 && e.Control is ComboBox)
        {
            ComboBox comboBox = e.Control as ComboBox;
            comboBox.SelectedIndexChanged -= LastColumnComboSelectionChanged;
            comboBox.SelectedIndexChanged += LastColumnComboSelectionChanged;
        }
    }

    private void LastColumnComboSelectionChanged(object sender, EventArgs e)
    {
        var currentcell = dataGridView1.CurrentCellAddress;
        var sendingCB = sender as DataGridViewComboBoxEditingControl;
        DataGridViewTextBoxCell cel = (DataGridViewTextBoxCell)dataGridView1.Rows[currentcell.Y].Cells[0];
        cel.Value = sendingCB.EditingControlFormattedValue.ToString();
    }