我如何获得DataGridView的组合框来显示其下拉列表中点击？

问题描述：

在我设置EditOnEnter是真实的，在的DataGridViewComboBoxCell 仍需要两次点击打开，如果我不点击组合框的向下箭头的一部分。

After I set "EditOnEnter" to be true, the DataGridViewComboBoxCell still takes two clicks to open if I don't click on the down arrow part of the combo box.

任何人有任何线索如何解决这一问题？我有我自己的的DataGridView 类，我用，这样我就可以很容易地与一些聪明的事件处理程序，希望解决这个问题的全系统。

Anyone have any clue how to fix this? I've got my own DataGridView class that I use, so I can easily fix this issue system-wide with a few smart event handlers I hope.

感谢。

答

既然你已经有的DataGridView 的编辑模式属性设置为EditOnEnter，你可以忽略它的 OnEditingControlShowing 的方法，以确保在下拉列表，一旦显示为一个组合框获得焦点：

Since you already have the DataGridView's EditMode property set to "EditOnEnter", you can just override its OnEditingControlShowing method to make sure the drop-down list is shown as soon as a combo box receives focus:

public class myDataGridView : DataGridView
{

    protected override void OnEditingControlShowing(DataGridViewEditingControlShowingEventArgs e)
    {
        base.OnEditingControlShowing(e);

        if (e.Control is ComboBox) {
            SendKeys.Send("{F4}");
        }
    }

}

每当你的的DataGridView编辑控件控件获得输入焦点，上述code检查，看它是否是一个组合框。如果是这样，它几乎presses 的F4键，这将导致下拉部分扩展（尝试当任何组合框的焦点！）。这是一个黑客的一点点，但它的工作原理就像一个魅力。

Whenever an edit control in your DataGridView control gets the input focus, the above code checks to see if it is a combo box. If so, it virtually "presses" the F4 key, which causes the drop-down portion to expand (try it when any combo box has the focus!). It's a little bit of a hack, but it works like a charm.

我如何获得DataGridView的组合框来显示其下拉列表中点击？

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