Problem with paging when search is avalible

Question

hi. i am not sure how to solve this issue with paging when search is avalible. it is for a webshop so at first i get products default, then visotors can lets say do a search for brands. but my problem becomes that my paging cause a postback everytime i change page. how is it done to avoid that problem. here is my code i use

protected void Page_Load(object sender, EventArgs e)
    {
        if ((Request.QueryString["Page"] != null))
        {
            CurrentPage = int.Parse(Request.QueryString["Page"]);
        }
        if (!Page.IsPostBack)
        {
            BindMachinaryDetails(8);
        }
    }

void BindMachinaryDetails(int catid)//mchar
    {
        var col = (ICollection)ObjectFactory.GetInstance<IReceiverService>().GetAll();
        if (col.Count > 0)
        {
            var objPds = new PagedDataSource
            {
                DataSource = col,
                AllowPaging = true,
                PageSize = 3,
                CurrentPageIndex = (CurrentPage - 1)
            };

            CreatePaging(col.Count);
            rpMachDet.DataSource = objPds;
            rpMachDet.DataBind();
        }
    }

public void CreatePaging(int TotalRecords)
    {
        int TotalPages;
        int StartPage;
        int VisiblePages;

        if (TotalRecords % RecordsPerPage == 0)
        {
            TotalPages = (TotalRecords / RecordsPerPage); //total pages
        }
        else
        {
            TotalPages = (TotalRecords / RecordsPerPage) + 1;
        }

        //TotalMessages.Text = "Page <b>" + CurrentPage + "</b> of <b>" + TotalPages + "</b>";

        //RecordsCount.Text = "<b>" + TotalRecords + "</b> Records";
        int i;

        int Page;
        int.TryParse(Request.QueryString["Page"], out Page);

        string NavigationText = "";



        if (Request.QueryString["Page"] == null || Page == 1 || Page == 2 || Page == 3)
        {
            StartPage = 1;
        }
        else
        {
            StartPage = Page - 3;
        }


        if (CurrentPage > 1)
        {
            var lbnFirst = new LinkButton{ID = "first", };

            NavigationText += "<a href=" + Request.ServerVariables["SCRIPT_NAME"] + "?Page=" + (1) + ">First</a>";
            NavigationText += "<a href=" + Request.ServerVariables["SCRIPT_NAME"] + "?Page=" + (CurrentPage - 1) + ">< </a> "; //Previous
        }

        //visa visible pages
        if (Page < 3)
        {
            VisiblePages = 7;
        }
        else
        {
            VisiblePages = StartPage + 6;
        }


        for (i = StartPage; i <= VisiblePages; i++)
        {
            if (CurrentPage == i)
            {
                NavigationText += "<b>" + i + "</b> ";
            }
            else
            {
                NavigationText += "<a href=" + Request.ServerVariables["SCRIPT_NAME"] + "?Page=" + i + ">" + i + "</a> ";
            }
        }
        if (CurrentPage < TotalPages)
        {
            NavigationText += "<a href=" + Request.ServerVariables["SCRIPT_NAME"] + "?Page=" + (CurrentPage + 1) + "> ></a> "; //Next
            NavigationText += "<a href=" + Request.ServerVariables["SCRIPT_NAME"] + "?Page=" + TotalPages + "> Last</a>";
        }

        PagingLabel.Text = NavigationText;
    }