如何激活combobox第一次点击（Datagridview） [英] How to activate combobox on first click (Datagridview)

问题描述

在winforms中，您需要单击两次组合框以正确激活它 - 第一次对焦，第二次实际获取下拉列表。

我如何改变这种行为，使其在第一次点击激活？

编辑：哦上帝..我忘了这是为DATAGRIDVIEW组合框。我的错。对不起。

解决方案

我意识到这是一个老问题，但我想我会给我的解决方案给任何人，

虽然我找不到任何答案做这个...我找到了一个 answer 到帮助我的另一个问题。

这是我的解决方案：

  private void datagridview_CellEnter（object sender，DataGridViewCellEventArgs e）
 {
 bool validClick =（e.RowIndex！= -1& & e.ColumnIndex！= -1）; //确保点击的行/列有效。 
 var datagridview = sender as DataGridView; 
 
 //检查以确保单击的单元格是包含组合框的单元格
 if（datagridview.Columns [e.ColumnIndex]是DataGridViewComboBoxColumn&& validClick）
 { 
 datagridview.BeginEdit（true）; 
（（ComboBox）datagridview.EditingControl）.DroppedDown = true; 
} 
} 
  

上述代码必须绑定到

添加了列索引检查，以在选择整个行时防止崩溃。

感谢，上所有夜晚上述编辑

edit2：绑定到CellEnter而不是CellClick事件。

感谢您， HaraldDutch < a>为上述编辑

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.

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

Edit: Oh god.. I forgot that this is for DATAGRIDVIEW combobox. My mistake. Sorry.

解决方案

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.

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

This is my solution:

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;
        }
    }

The above code must be tied into the CellEnter event of the datagridview.

I hope this helps!

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

Thanks, Up All Night for the above edit

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

Thanks, HaraldDutch for the above edit

这篇关于如何激活combobox第一次点击（Datagridview）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！