在DataGrid的第一列自动生成序号，如下图：
代码实现：
前台（WebForm1.aspx）：
<asp:DataGrid id="grdCustomer" style="Z-INDEX: 102; LEFT: 30px; POSITION: absolute; TOP: 152px" runat="server" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" BackColor="White" CellPadding="3" Font-Size="X-Small" AutoGenerateColumns="False">
<SelectedItemStyle Font-Bold="True" ForeColor="White" BackColor="#669999">
</SelectedItemStyle>
<AlternatingItemStyle BackColor="#FFF2F2"></AlternatingItemStyle>
<ItemStyle ForeColor="#000066" BackColor="#FAFFF9"></ItemStyle>
<HeaderStyle Font-Bold="True" ForeColor="White" BackColor="#006699"></HeaderStyle>
<FooterStyle ForeColor="#000066" BackColor="White"></FooterStyle>
<Columns>
<asp:TemplateColumn HeaderText="序号">
<ItemTemplate>
<asp:label id="lable1" runat=server><%#GetCount()%></asp:label>
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="CustomerID" HeaderText="客户ID"></asp:BoundColumn>
<asp:BoundColumn DataField="CompanyName" HeaderText="公司名称"></asp:BoundColumn>
<asp:BoundColumn DataField="City" HeaderText="城市"></asp:BoundColumn>
<asp:BoundColumn DataField="Address" HeaderText="地址"></asp:BoundColumn>
</Columns>
</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 ;
}