设置DataGridViewComboBoxCell中项目的字体颜色

Question

如何为DataGridViewComboBoxCell中的不同项设置字体颜色？例如，如果我有10个项目，我如何将项目3和5变成红色，而将其他项目变成黑色？

编辑：这是一个winform应用程序，DataGridViewComboBox不是数据绑定

edit2：也许我可以在editcontrolshow中这样做？

   private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
   {
            if (dataGridView1.Columns[dataGridView1.CurrentCell.ColumnIndex].Name == "MyCombo")
            {
                DataGridViewComboBoxCell comboCell = (DataGridViewComboBoxCell)dataGridView1.CurrentCell;
                for (int i = 0; i < comboCell.Items.Count; ++i)
                {
                    string contract = comboCell.Items[i].ToString();
                    if (contract.ToUpper().Contains("NO"))
                    {
                        // can I set this item have a red font color???
                    }
                }
}

Answer 1

对于行执行以下操作-挂钩OnRowDataBound事件，然后执行

ASPX（网格）:

    <asp:.... OnRowDataBound="RowDataBound"..../>

代码背后：

    protected void RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowIndex == -1)
        {
            return;
        }
        if(e.Row.Cells[YOUR_COLUMN_INDEX].Text=="NO"){
             e.Row.BackColor=Color.Red;   
        }
    }

对于WinForms:

hook the **DataBindingComplete** event and do stuff in it:
     private void dataGridView1_DataBindingComplete(object sender, 
                       DataGridViewBindingCompleteEventArgs e)
    {
        if (e.ListChangedType != ListChangedType.ItemDeleted)
        {
            DataGridViewCellStyle red = dataGridView1.DefaultCellStyle.Clone();
            red.BackColor=Color.Red;
            foreach (DataGridViewRow r in dataGridView1.Rows)
            {
                if (r.Cells["FollowedUp"].Value.ToString()
                       .ToUpper().Contains("NO"))
                {
                    r.DefaultCellStyle = red;
                }
            }
        }
    }

Answer 2

您需要手动绘制组合框项目。尝试以下操作（基于此MSDN文章）：

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
    // Note this assumes there is only one ComboBox column in the grid!
    var comboBox = e.Control as ComboBox;
    if (comboBox == null)
        return;
    comboBox.DrawMode = DrawMode.OwnerDrawFixed;
    comboBox.DrawItem -= DrawGridComboBoxItem;
    comboBox.DrawItem += DrawGridComboBoxItem;
}
private void DrawGridComboBoxItem(object sender, DrawItemEventArgs e)
{
    e.DrawBackground();
    if (e.Index != -1)
    {
        // Determine which foreground color to use
        var itemValue = actionsColumn.Items[e.Index] as string;
        bool isNo = String.Equals("no", itemValue, StringComparison.CurrentCultureIgnoreCase);
        Color color = isNo ? Color.Red : e.ForeColor;
        using (var brush = new SolidBrush(color))
            e.Graphics.DrawString(itemValue, e.Font, brush, e.Bounds);
    }
    e.DrawFocusRectangle();
}