Winfrom 的Click、RowPrePaint两个函数用法

gridview 的SelectedIndexChanging 可以在Winform里的Click里实现

例如行的变化，获取行变化的值

 if (dataGridView1.Rows.Count > 0)
 {
                string str = dataGridView1.SelectedRows[0].Cells["WOID"].Value.ToString();
                label1.Text = str;

}

gridview 的RowDataBound 可以在Winform里的RowPrePaint里实现

例如在某值范围内改变字体颜色或行背景颜色

 if (e.RowIndex >= dataGridView1.Rows.Count - 1)
            {
                return;
            }
            DataGridViewRow dgr = dataGridView1.Rows[e.RowIndex];
            try
            {
                if (Convert.ToInt32(dgr.Cells["WOID"].Value.ToString()) > 4)
                {
                    dgr.DefaultCellStyle.ForeColor = System.Drawing.Color.Red;
                    dgr.DefaultCellStyle.BackColor = System.Drawing.Color.Blue;
                }
            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }