GridView————绑定GridView时（RowDataBound）添加一些样式

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/// <summary>
    /// 绑定GridView时（RowDataBound）添加一些属性
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {

//行单元格从0开始数

        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Attributes.Add("onmouseover", "yes=this.style.backgroundColor; this.style.backgroundColor='red'");
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=yes");

//获取绑定行的book对象
Book book = (Book)e.Row.DataItem;

            //给价格的单元格添加color颜色
            if (book.UnitPrice < 80)
            {
                e.Row.Cells[8].Attributes.Add("style", "color:green");
                // e.Row.Cells[6].Text = "便宜";
            }
            else if (book.UnitPrice < 200)
            {
                e.Row.Cells[8].Attributes.Add("style", "color:yellow");
            }
            else
            {
                e.Row.Cells[8].Attributes.Add("style", "color:red");
            }
            this.sumPrice += Convert.ToSByte(book.UnitPrice); //累加价格（方便计算平均价格）

            //序号1，2，3......
            String num = Convert.ToString(e.Row.RowIndex + 1);
            e.Row.Cells[0].Text = num;

            //判断内容的字数是否大于20，如果大于，就是只显示20个字符+....
            if (book.ContentDescription.Length > 20)
            {
                e.Row.Cells[5].Text = book.ContentDescription.Substring(0, 20) + "...";
            }

//隐藏列

// e.Row.Cells[6].Attributes.Add("style", "display:none"); //隐藏数据列

        }
        else if (e.Row.RowType == DataControlRowType.Footer)   //判断是不是脚注行
        {

            e.Row.Cells[7].Text = "均价";
            float avgPrice = sumPrice / this.gvBook.Rows.Count;    //注：Rows不包含标头行和脚注行
            String money = String.Format("{0:C2}", avgPrice);   //格式化均价（以货币的形式显示）
            e.Row.Cells[8].Text = money;

}