在部分项目中我们用到GridView控件会涉及到列中数据统计，下面针对GridView中列的汇总做以说明；
1. 开始我们以northwind数据库为例从数据库中读取数据到页面
String connString = "server=.;user=sa;pwd=;database=northwind";
//汇总价格
double totalPrice = 0;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
using (SqlConnection sqlCon = new SqlConnection(connString))
{
String sql = "select top 10 productid,productname,unitprice from products";
using (SqlCommand cmd = new SqlCommand(sql, sqlCon))
{
sqlCon.Open();
SqlDataReader rs = cmd.ExecuteReader();
gvProducts.DataSource = rs;
gvProducts.DataBind();
}
}
}
}
2. 接下来书写OnRowDataBound 事件（在对行进行了数据绑定后激发）
if (e.Row.RowType == DataControlRowType.DataRow)
{
double price = double.Parse(e.Row.Cells[e.Row.Cells.Count - 1].Text);
totalPrice += price;
}
3. DataBound事件(控件被数据绑定后事件)
gvProducts.FooterRow.Cells[gvProducts.FooterRow.Cells.Count - 1].Text = totalPrice.ToString();
