在 DataGrid 的第一列自动生成序号，如下图：
代码实现：
前台（ WebForm1.aspx ）：
1<asp:datagrid autogeneratecolumns="False" backcolor="White" bordercolor="#CCCCCC" borderstyle="None" borderwidth="1px" cellpadding="3" font-size="X-Small" id="grdCustomer" runat="server" style="Z-INDEX: 102; LEFT: 30px; POSITION: absolute; TOP: 152px">
2<selecteditemstyle backcolor="#669999" font-bold="True" forecolor="White">
3</selecteditemstyle>
4<alternatingitemstyle backcolor="#FFF2F2"></alternatingitemstyle>
5<itemstyle backcolor="#FAFFF9" forecolor="#000066"></itemstyle>
6<headerstyle backcolor="#006699" font-bold="True" forecolor="White"></headerstyle>
7<footerstyle backcolor="White" forecolor="#000066"></footerstyle>
8<columns>
9<asp:templatecolumn headertext=" 序号 ">
10<itemtemplate>
11<asp:label id="lable1" runat="server">```
12#GetCount()
13```</asp:label>
14</itemtemplate>
15</asp:templatecolumn>
16<asp:boundcolumn datafield="CustomerID" headertext=" 客户 ID"></asp:boundcolumn>
17<asp:boundcolumn datafield="CompanyName" headertext=" 公司名称 "></asp:boundcolumn>
18<asp:boundcolumn datafield="City" headertext=" 城市 "></asp:boundcolumn>
19<asp:boundcolumn datafield="Address" headertext=" 地址 "></asp:boundcolumn>
20</columns>
21</asp:datagrid>
后台（ WebForm1.aspx.cs ）：
int count;
private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
SqlConnection cnn = new SqlConnection();
cnn.ConnectionString = "data source=localhost;initial catalog=Northwind;password=;"
+"persist security info=True;user id=sa;workstation id=APJ062;packet size=4096";
string sqlstr = "select Top 10 CustomerID, CompanyName, City, Address from Customers";
cnn.Open();
SqlDataAdapter ad = new SqlDataAdapter(sqlstr,cnn);
DataTable dt = new DataTable();
ad.Fill(dt);
grdCustomer.DataSource = dt;
grdCustomer.DataBind();
}
// 自动记数函数，在前台调用
public int GetCount()
{
return ++count ;
}