using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using weblibrary.data;

public partial class _Default : System.Web.UI.Page
{
    private SqlDataAdapter da;
    private DataSet ds = new DataSet();
    protected void Page_Load(object sender, EventArgs e)
    {
        getInfo();
      
    }

    private void getInfo()
    {
        string str = "Data Source = .;Initial Catalog = library; User Id = sa;Password = 123";
        string sql = "select * from LB_FLXX";
        SqlConnection conn = new SqlConnection(str);
        da = new SqlDataAdapter(sql, conn);
        da.Fill(ds, "t");
        GridView1.DataSource = ds.Tables["t"];
        GridView1.DataBind();
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        getInfo();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        SqlCommandBuilder cb = new SqlCommandBuilder(da);
        da.Update(ds, "t");
        GridView1.EditIndex = -1;
        getInfo();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        getInfo();
    }
}

[[it] 本帖最后由 yph1331 于 2008-11-6 14:04 编辑 [/it]]

问题已解决谢谢

现在用的是：
string sql = "update LB_FLXX set L_FLMC = @L_FLMC where L_FLBH = @L_FLBH";
        SqlCommand cmd = new SqlCommand(sql, conn);
        string name = ((TextBox)(this.GridView1.Rows[e.RowIndex].Cells[1].FindControl("TextBox2"))).Text.Trim();
        int num = Convert.ToInt32(((TextBox)(this.GridView1.Rows[e.RowIndex].Cells[0].FindControl("TextBox1"))).Text.Trim());
        cmd.Parameters.AddWithValue("@L_FLBH", num);
        cmd.Parameters.AddWithValue("@L_FLMC", name);
        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
        }
        catch
        {
            Response.Write("数据库操作失败!");
        }
        finally
        {
            conn.Close();
        }
        GridView1.EditIndex = -1;
        getInfo();
不过用  SqlCommandBuilder cb = new SqlCommandBuilder(da);
        da.Update(ds, "t");
还是不行，错误提示：未将对象引用设置到对象的实例。