GridView实现先执行 后绑定问题

前台页面

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="PModel" onrowcommand="GridView1_RowCommand">
 <Columns>
 <asp:TemplateField HeaderText="操作">
 　　<ItemTemplate>
　　　　<asp:LinkButton ID="lbtn_delete" CommandName="GvDel" runat="server">删除</asp:LinkButton>
 　　</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

后台页面

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

    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "GvDel")
        {
            GridViewRow drv = (GridViewRow)((LinkButton)e.CommandSource).NamingContainer;

            string orderNum = this.GridView1.Rows[drv.RowIndex].Cells[1].Text.ToString();
            SqlParameter[] para = new SqlParameter[] { new SqlParameter("@ordernum",orderNum )};
            ExecutionADO exe = new ExecutionADO();
            exe.ExecutionParameter("IsDelete", para);

            bind();
            ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('删除成功！')</script>");
        }
    }

    public void bind()
    {
        string sqlStr = "SELECT PModel,OrderNum,PTName FROM Product AS P INNER JOIN [ProductType] AS PT ON P.PTId=PT.PTID WHERE P.Isdelete=0";
        DataSet myds = ExecutionADO.dataSet(sqlStr);
            GridView1.DataSource = myds;
            GridView1.DataKeyNames = new string[] { "PModel" };
            GridView1.DataBind();
    }

}

类库代码

///<summary>
    /// 存储过程执行sql语句 无返回值
    ///</summary>
    ///<param name="sqlPS">存储过程名字</param>
    ///<param name="para">SqlParameter对象</param>
publicvoid ExecutionParameter(string sqlPS, SqlParameter[] para)
    {
        using (SqlConnection conn =new SqlConnection(connectionString))
        {
            using (SqlCommand comm =new SqlCommand(sqlPS, conn))
            {
                try
                {
                    conn.Open();

                    comm.CommandType = CommandType.StoredProcedure;

                    comm.Parameters.AddRange(para);
                    comm.ExecuteNonQuery();
                }
                catch (SqlException e)
                {
                    conn.Close();
                    thrownew Exception(e.Message);
                }
                finally
                {
                    conn.Close();
                    comm.Parameters.Clear();
                }

            }
        }
    }

///<summary>
    /// 返回一个数据集
    ///</summary>
    ///<param name="sqlStr">sql语句</param>
    ///<returns></returns>
publicstatic DataSet dataSet(string sqlStr)
    {
        SqlDataAdapter da =new SqlDataAdapter();
        DataSet ds =new DataSet();
        using (SqlConnection connection =new SqlConnection(connectionString))
        {
            using (SqlCommand cmd =new SqlCommand(sqlStr, connection))
            {
                try
                {

                    cmd.CommandType = CommandType.Text;
                    cmd.CommandText = sqlStr;
                    da.SelectCommand = cmd;
                    da.Fill(ds);
                }
                catch (Exception e)
                {
                    thrownew Exception(e.Message);
                }
                finally
                {
                    connection.Close();
                }
            }

            return ds;
        }
    }