public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
BindGrid();
}
}

private DataTable ReadGridView()
{
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("ProductID", typeof(string)));
dt.Columns.Add(new DataColumn("ProductName", typeof(string)));
dt.Columns.Add(new DataColumn("CategoryID", typeof(string)));
for (int i = 0; i < this.GridView1.Rows.Count; i++)
{
dr = dt.NewRow();
dr[0] = this.GridView1.Rows[i].Cells[0].Text.Trim();
dr[1] = this.GridView1.Rows[i].Cells[1].Text.Trim();
dr[2] = this.GridView1.Rows[i].Cells[2].Text.Trim();
dt.Rows.Add(dr);
}
return dt;
}
protected void Button1_Click(object sender, EventArgs e)
{
DataTable dt = ReadGridView();
//this.GridView1.DataSource = dt;
//this.GridView1.DataBind();
DataRow row = dt.NewRow();
row.ItemArray = new object[] { "oec2003","oec2003","oec2003" };
dt.Rows.InsertAt(row, 0);
dt.AcceptChanges();
this.GridView1.DataSource = dt;
this.GridView1.DataBind();
}

private void BindGrid()
{
string str = ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ToString();
using (SqlConnection con = new SqlConnection(str))
{
SqlCommand cmd = new SqlCommand("SELECT top 1 [ProductID], [ProductName], [CategoryID] FROM [Products]", con);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
sda.Fill(ds);
this.GridView1.DataSource = ds.Tables[0].DefaultView;
this.GridView1.DataBind();
sda.Dispose();
ds.Dispose();
}

}
}

html代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

数据库连接字串

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