如何在第一次单击时激活组合框 (Datagridview) [英] How to activate combobox on first click (Datagridview)

问题描述

在 winforms 中，您需要单击组合框两次才能正确激活它 - 第一次是聚焦它，第二次是实际获取下拉列表.

In winforms, you need to click the combobox twice to properly activate it - the first time to focus it, the second time to actually get the dropdown list.

如何更改此行为，使其在第一次点击时激活?

How do I change this behavior so that it activates on the very first click?

这是用于 DATAGRIDVIEW 组合框.

This is for DATAGRIDVIEW combobox.

推荐答案

我意识到这是一个老问题，但我想我会将我的解决方案提供给任何可能需要这样做的人.

I realize this is an old question, but I figured I would give my solution to anyone out there that may need to be able to do this.

虽然我找不到任何答案来做到这一点......我确实找到了一个不同的答案对我有帮助的问题.

While I couldn't find any answers to do exactly this... I did find an answer to a different question that helped me.

这是我的解决方案:

private void datagridview_CellEnter(object sender, DataGridViewCellEventArgs e)
    {
        bool validClick = (e.RowIndex != -1 && e.ColumnIndex != -1); //Make sure the clicked row/column is valid.
        var datagridview = sender as DataGridView;

        // Check to make sure the cell clicked is the cell containing the combobox 
        if(datagridview.Columns[e.ColumnIndex] is DataGridViewComboBoxColumn && validClick)
        {
            datagridview.BeginEdit(true);
            ((ComboBox)datagridview.EditingControl).DroppedDown = true;
        }
    }


private void datagridview_CurrentCellDirtyStateChanged(object sender, EventArgs e)
    {
        datagridview.CommitEdit(DataGridViewDataErrorContexts.Commit);
    }

以上代码必须绑定到datagridview的CellEnter事件中.

我希望这会有所帮助！

添加了列索引检查以防止在选择整行时崩溃.

edit: Added a column index check to prevent crashing when the entire row is selected.

谢谢，通宵进行上述编辑

edit2:代码现在与 CellEnter 而不是 CellClick 事件相关联.

edit2: Code is now to be tied to the CellEnter rather than the CellClick event.

谢谢，HaraldDutch 对上述编辑

edit3:任何更改都会立即提交，这将使您无需单击另一个单元格来更新当前组合框单元格.

edit3: Any changes will committed immediately, this will save you from clicking in another cell in order to update the current combobox cell.

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