protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

    {

      GridView1.EditIndex = e.NewEditIndex;

      this.shuaxin();

    }

   protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)

   {

    GridView1.EditIndex = -1;

    this.shuaxin();

   }

    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)

    {

      this.GridView1.EditIndex = e.RowIndex;

      string title = GridView1.DataKeys[e.RowIndex].Value.ToString();

      string cotent = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text;

 

      string strsql = "update activities set cotent='" + cotent + "'

               where title='" + title + "'";

      SqlConnection con = new SqlConnection(ConfigurationManager.

                ConnectionStrings["username"].ConnectionString);

      SqlCommand cmd = new SqlCommand(strsql, con);

      con.Open();

      cmd.ExecuteNonQuery();

      con.Close();

      GridView1.EditIndex = -1;

      this.shuaxin();

    }

    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)

    {

      string title = GridView1.DataKeys[e.RowIndex].Value.ToString();

 

      string delete = "delete activities where title='" + title + "'";

 

      SqlConnection con = new SqlConnection(ConfigurationManager.

                ConnectionStrings["username"].ConnectionString);

      SqlCommand cmd = new SqlCommand(delete, con);

      con.Open();

      cmd.ExecuteNonQuery();

      con.Close();

      GridView1.EditIndex = -1;

      this.shuaxin();  //自己写的链接数据库的方法；

    }

    private void shuaxin()

    {

      SqlConnection sqlcon = new SqlConnection(ConfigurationManager.

                 ConnectionStrings["username"].ConnectionString);

      sqlcon.Open();

      SqlDataAdapter da = new SqlDataAdapter(@"select * from activities", sqlcon);

      DataSet ds = new DataSet();

      da.Fill(ds);

      if (ds.Tables[0].Rows.Count > 0)

      {

        GridView1.DataSource = ds;

        GridView1.DataBind();

      }

      sqlcon.Close();

    }