实现效果:

知识运用:
DataGridViewRow类的公共属性DefaultCellStyle的BackColor属性
public Color BackColor {get; set;}
实现代码:
private void button1_Click(object sender, EventArgs e)
{
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
if (i % 2 == 0)
dataGridView1.Rows[i].DefaultCellStyle.BackColor = Color.LightYellow;
}
}
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