关于多条件查询、分页 数据源纷乱 please hlep me

/// <summary>
        /// 分页 数据绑定
        /// 还重载了PagedDataLoad方法，参数为List<Users>，作为数据源
        /// </summary>
        protected void PagedDataLoad()
        {
            try
            {
                //数据源
                PagedDataSource Pgds = new PagedDataSource();
                //数据源赋值
                Pgds.DataSource = manager.QueryAll();
                //设置允许分页
                Pgds.AllowPaging = true;
                //每页显示的行数
                Pgds.PageSize = 5;
                //显示总共页数
                lblTotalPage.Text = Pgds.PageCount.ToString();
                //当前页
                int CurrentPage;
                //请求页码为不为null设置当前页，否则为第一页
                if (Request.QueryString["Page"] != null)
                    CurrentPage = Convert.ToInt32(Request.QueryString["Page"]);
                else
                    CurrentPage = 1;
                //当前页索引为页码-1
                Pgds.CurrentPageIndex = CurrentPage - 1;
                //显示当前页码
                lblCurrentPage.Text = CurrentPage.ToString();
                //if(Pgds.PageCount)
                //如果不是第一页，通过参数Page设置上一页为当前页-1，否则不显示连接
                if (!Pgds.IsFirstPage)
                {    //Request.CurrentExecutionFilePath为当前请求虚拟路径
                    if (CurrentPage <= 0)
                    {
                        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "MyScript", "alert('不存在的页码！')", true);
                        return;
                    }
                    lnkPrev.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurrentPage - 1);
                    
                }
                //End If
                //如果不是最后一页，通过参数Page设置下一页为当前页+1，否则不显示连接
                if (!Pgds.IsLastPage)
                {
                    if (CurrentPage > Pgds.PageCount)
                    {
                        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "MyScript", "alert('不存在的页码！')", true);
                        return;
                    }
                    //Request.CurrentExecutionFilePath为当前请求虚拟路径
                    lnkNext.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurrentPage + 1);
                }

                //将当前页数保存到ViewState
                //ViewState["page"] = CurrentPage.ToString();
                //模板绑定数据源  
                Repeater1.DataSource = Pgds;
                Repeater1.DataBind();
            }
            catch (Exception ex)
            {
                this.Page.ClientScript.RegisterStartupScript(this.GetType(), "MyScript", "alert('" + ex.Message.ToString() + "')", true);
                return;
            }
        }
         /////////////多条件查询的查询按钮事件
        protected void btnSend_Click(object sender, EventArgs e)
        {
            
            if (txtID.Text.Trim() == "" && txtName.Text.Trim() == "" && txtRemark.Text.Trim() == "")
            {
                this.Page.ClientScript.RegisterStartupScript(this.GetType(), "MyScript", "alert('必须填其中一项！')", true);
                PagedDataLoad();
                return;
            }
            int id = 0;
            try
            {
                if (txtID.Text.Trim() != "")
                    id = Convert.ToInt32(txtID.Text.Trim());
            }
            catch (Exception ex)
            {
                this.Page.ClientScript.RegisterStartupScript(this.GetType(), "MyScript", "alert('ID应为大于0的自然整数,请重新输入！！')", true);
                txtID.Text = "";
                ExceptionManage.WriteLogFile(ex.ToString());
                return;
            }
            
            //从repeater中找到Timer控件，并停止异步回发。
            Timer timer = new Timer();
            for (int i = 0; i < Repeater1.Items.Count; i++)
            {
                timer = (Timer)Repeater1.Items[i].FindControl("Timer1");
            }
            timer.Enabled = false;

            List<Users> list = manager.QueryList(id, txtName.Text, txtRemark.Text);
            PagedDataLoad(list);
        }
/////////////////Timer_Tick 事件
protected void Time1_Tick(object sender, EventArgs e)
        {
            PagedDataLoad();
        }
///////////////////删除按钮事件
protected void BtnDel_Click(object sender, EventArgs e)
        {
            Button del = (Button)sender;
            int id = Convert.ToInt32(del.CommandArgument);
            int n = manager.Delete(id);
            if (n == 0)
            {
                Page.ClientScript.RegisterStartupScript(this.GetType(), "MyScript", "alert('删除失败！');", true);
            }
            else
            {
                Page.ClientScript.RegisterStartupScript(this.GetType(), "MyScript", "alert('删除成功！');", true);

            }
            PagedDataLoad();
        }