dataGridView1_Paint修改显示字体颜色问题

Question

我在dataGridView1_Paint修改了显示字体的颜色，但运行多线程的时候winform会卡，出现假死，这是什么原因呢？
 private void dataGridView1_Paint(object sender, PaintEventArgs e)
        {
           
                for (int i = 0; i<=dataGridView1.Rows.Count - 1; i++)
                {
                    DataGridViewRow CurrRow = dataGridView1.Rows[i];
                    try
                    {
                        if (CurrRow.Cells[3].Value.ToString() == "未处理")
                        {
                            CurrRow.DefaultCellStyle.ForeColor = Color.Black;
        
                        }
                        if (CurrRow.Cells[3].Value.ToString()=="已处理")
                        {
                            CurrRow.DefaultCellStyle.ForeColor=Color.DodgerBlue;
                        }
                        if (CurrRow.Cells[3].Value.ToString() == "已回复")
                        {
                            CurrRow.DefaultCellStyle.ForeColor = Color.DodgerBlue;
                        }
 
                    }
                    catch (Exception ex)//异常处理
                    {
                        Console.WriteLine(ex.Message);
                    }
                }
            

Answer 1

每次增，减行都会导致重绘，这效率太低了。建议绑定数据之后，直接对 DataGridView.Rows 编译修改颜色，不用写到 Paint 事件里。