手写dataview增删改查事件

using System;
using System.Data;
using System.Configuration;
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;

public partial class _Default : System.Web.UI.Page
{
    SqlConnection sqlcon;
    SqlCommand sqlcmd;
    string strcon = "server=.;database=db_04;uid=sa;pwd=;";
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            this.bind();
        }
    }
    public void bind()
    {
        string sqlstr = "select * from tb_Member";
        sqlcon = new SqlConnection(strcon);
        SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
        DataSet ds = new DataSet();
        sqlcon.Open();
        myda.Fill(ds, "tb_Member");
        GridView1.DataSource = ds;
        GridView1.DataKeyNames = new string[] { "id" };
        GridView1.DataBind();
        sqlcon.Close();
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        bind();
    }
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string sqlstr = "delete from tb_Member where id='"+GridView1.DataKeys[e.RowIndex].Value.ToString()+"'";
        sqlcon = new SqlConnection(strcon);
        sqlcmd = new SqlCommand(sqlstr, sqlcon);
        sqlcon.Open();
        sqlcmd.ExecuteNonQuery();
        sqlcon.Close();
        bind();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        sqlcon = new SqlConnection(strcon);
        string sqlstr = "update tb_Member set name='"
            + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',sex='"
            + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString().Trim() + "',nPlace='"
            + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where id='"
            + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
        sqlcmd = new SqlCommand(sqlstr, sqlcon);
        sqlcon.Open();
        sqlcmd.ExecuteNonQuery();
        sqlcon.Close();
        GridView1.EditIndex = -1;
        bind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        bind();
    }
}