如何使 DataGridViewComboBoxColumn 选择对齐中心？答案

【问题标题】：How to make DataGridViewComboBoxColumn selections alignment center?如何使 DataGridViewComboBoxColumn 选择对齐中心？
【发布时间】：2018-08-10 02:02:01
【问题描述】：

我想在编辑模式下（单击下拉菜单时）对齐 DataGridViewComboBoxColumn 选择文本中心。我在这里找到了一种方法：Align Text in Combobox，来对齐组合框，并尝试将EditingControlShowing 事件添加到 DGV，并像上面的方法一样添加DrawItem 事件来对齐组合框，但它不起作用。代码如下：

private void MyDGV_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
    if (e.Control.GetType() == typeof(DataGridViewComboBoxEditingControl))
    {
        ComboBox cb = e.Control as ComboBox;
        if (cb != null)
        {
            cb.DrawItem += new DrawItemEventHandler(cbxDesign_DrawItem);
        }
    }
}
private void cbxDesign_DrawItem(object sender, DrawItemEventArgs e)
{
    // By using Sender, one method could handle multiple ComboBoxes
    ComboBox cbx = sender as ComboBox;
    if (cbx != null)
    {
        // Always draw the background
        e.DrawBackground();

        // Drawing one of the items?
        if (e.Index >= 0)
        {
            // Set the string alignment.  Choices are Center, Near and Far
            StringFormat sf = new StringFormat();
            sf.LineAlignment = StringAlignment.Center;
            sf.Alignment = StringAlignment.Center;

            // Set the Brush to ComboBox ForeColor to maintain any ComboBox color settings
            // Assumes Brush is solid
            Brush brush = new SolidBrush(cbx.ForeColor);

            // If drawing highlighted selection, change brush
            if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
                brush = SystemBrushes.HighlightText;

            // Draw the string
            e.Graphics.DrawString(cbx.Items[e.Index].ToString(), cbx.Font, brush, e.Bounds, sf);
        }
    }
}

有什么建议吗？谢谢！

【问题讨论】：

你知道你可以在Winforms中使用WPF控件吗？ WPF 控件提供更多样式、格式选项
您似乎漏掉了答案的一部分：诀窍是将 ComboBox 的 DrawMode-Property 设置为 OwnerDrawFixed 并订阅其事件 DrawItem。

标签： c# winforms datagridviewcomboboxcolumn

【解决方案1】：

在您的代码中，您需要添加这些属性才能使代码正常工作：

private void MyDGV_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
    if (e.Control.GetType() == typeof(DataGridViewComboBoxEditingControl))
    {
        ComboBox cb = e.Control as ComboBox;
        if (cb != null)
        {
            //add these 2
            cb.DrawMode = DrawMode.OwnerDrawFixed;
            cb.DropDownStyle = ComboBoxStyle.DropDownList;
            cb.DrawItem += new DrawItemEventHandler(cbxDesign_DrawItem);
        }
    }
}

【讨论】：