我要处理一个值时，在组合框被改变了的DataGridView 细胞事件。

I want to handle the event when a value is changed in a ComboBox in a DataGridView cell.

还有的 CellValueChanged 事件，但一个不火，直到我点击别的地方的的DataGridView 里面。

There's the CellValueChanged event, but that one doesn't fire until I click somewhere else inside the DataGridView.

一个简单的组合框 SelectedValueChanged 不火后，立即选择了新的价值。

A simple ComboBox SelectedValueChanged does fire immediately after a new value is selected.

我如何添加一个监听到ComboBox这是细胞内？

How can I add a listener to the combobox that's inside the cell?

推荐答案

这是在code，这将触发选择的事件在DataGridView的组合框：

This is the code, which will fire the event of the selection in the comboBox in the dataGridView:

public Form1()
    {
        InitializeComponent();

        DataGridViewComboBoxColumn cmbcolumn = new DataGridViewComboBoxColumn();
        cmbcolumn.Name = "cmbColumn";
        cmbcolumn.HeaderText = "combobox column";
        cmbcolumn.Items.AddRange(new string[] { "aa", "ac", "aacc" });
        dataGridView1.Columns.Add(cmbcolumn);
        dataGridView1.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(dataGridView1_EditingControlShowing);
    }

    private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        ComboBox combo = e.Control as ComboBox;
        if (combo != null)
        {
            combo.SelectedIndexChanged -= new EventHandler(ComboBox_SelectedIndexChanged);
            combo.SelectedIndexChanged += new EventHandler(ComboBox_SelectedIndexChanged);
        }
    }

    private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
    {
        ComboBox cb = (ComboBox)sender;
        string item = cb.Text;
        if (item != null)
            MessageBox.Show(item);
    }