gridview单元格编辑刷新问题
就是单击gridview的单元格进行编辑时，每单击一次单元格进行编辑时，页面都会刷新一次，怎样使单击单元格页面不再刷新
后台代码如下：
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.Drawing;
using System.Data.SqlClient;
public partial class Rdlcs_rp_nmjbqk : System.Web.UI.Page
{
  Ref.DAL.T_refugee_total DAL_T_refugee_total = new Ref.DAL.T_refugee_total();
  Ref.Model.T_refugee_total Mod_T_refugee_total = new Ref.Model.T_refugee_total();
  public string Report_ID
  {
  get
  {
  if (ViewState["Report_ID"] != null)
  {
  return ViewState["Report_ID"].ToString();
  }
  else
  {
  ViewState.Add("Report_ID", "");
  return ViewState["Report_ID"].ToString();
  }
  }
  set
  {
  ViewState["Report_ID"] = value;
  }
  }
  int _firstEditCellIndex = 2;
  protected void Page_Load(object sender, EventArgs e)
  {
  if (!IsPostBack)
  {
  InitPageInfo();
  }
  }
   
   
  private void InitPageInfo()
  {
  if (Report_ID.ToString() == "")
  {

  }
  else
  {
  Report_ID = Request.QueryString["id"].ToString();
  DataSet ds = new DataSet();
  string sql = "select * from T_refugee_total where Report_ID='" + Report_ID + "'";
  ds = Ref.DAL.DbHelperSQL.Query(sql);
  this.GridView1.DataSource = ds;
  this.GridView1.DataBind();
  }
  }
  protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
  {
  if (e.Row.RowType == DataControlRowType.DataRow)
  {
  LinkButton _singleClickButton = (LinkButton)e.Row.Cells[0].Controls[0];
  string _jsSingle = ClientScript.GetPostBackClientHyperlink(
  _singleClickButton, "");

  for (int columnIndex = _firstEditCellIndex; columnIndex <
  e.Row.Cells.Count; columnIndex++)
  {
  string js = _jsSingle.Insert(_jsSingle.Length - 2,
  columnIndex.ToString());
  e.Row.Cells[columnIndex].Attributes["onclick"] = js;
  e.Row.Cells[columnIndex].Attributes["style"] +=
  "cursor:pointer;cursor:hand;";
  }
  }
  }
  protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
  {
  switch (e.CommandName)
  {
  case ("SingleClick"):
  int _rowIndex = int.Parse(e.CommandArgument.ToString());
  int _columnIndex = int.Parse(Request.Form["__EVENTARGUMENT"]);
  this.GridView1.SelectedIndex = _rowIndex;