How to use querystring with previous and next button while doing repeater pagination in GridView in ASP.Net

Hi Debug,

I have created a sample which full fill your requirement

HTML

<div>
        <asp:GridView ID="gvCustomers" runat="server" AutoGenerateColumns="false">
            <Columns>
                <asp:BoundField HeaderText="CustomerId" DataField="CustomerID" />
                <asp:BoundField HeaderText="ContactName" DataField="ContactName" />
                <asp:BoundField HeaderText="CompanyName" DataField="CompanyName" />
            </Columns>
        </asp:GridView>
        <br />
        <asp:Repeater ID="rptPager" runat="server">
            <ItemTemplate>
                <asp:LinkButton ID="lnkPage" runat="server" Text='<%#Eval("Text") %>' CommandArgument='<%# Eval("Value") %>'
                    CssClass='<%# Convert.ToBoolean(Eval("Enabled")) ? "page_enabled" : "page_disabled" %>'
                    OnClick="Page_Changed" OnClientClick='<%# !Convert.ToBoolean(Eval("Enabled")) ? "return false;" : "" %>'
                    PostBackUrl='<%# "~/CS.aspx?PageIndex="+Eval("Value")%>'></asp:LinkButton>
            </ItemTemplate>
        </asp:Repeater>
    </div>

C#

private int PageSize = 10;
public int index
{
    get { return Request.QueryString["PageIndex"] != null ? Convert.ToInt32(Request.QueryString["PageIndex"]) : 1; }
    set { index = value; }
}

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        this.GetCustomersPageWise(index);
    }
}

private void GetCustomersPageWise(int pageIndex)
{
    string constring = ConfigurationManager.ConnectionStrings["conString"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constring))
    {
        using (SqlCommand cmd = new SqlCommand("GetCustomersPageWise", con))
        {
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@PageIndex", pageIndex);
            cmd.Parameters.AddWithValue("@PageSize", PageSize);
            cmd.Parameters.Add("@RecordCount", SqlDbType.Int, 4);
            cmd.Parameters["@RecordCount"].Direction = ParameterDirection.Output;
            con.Open();
            using (IDataReader idr = cmd.ExecuteReader())
            {
                gvCustomers.DataSource = idr;
                gvCustomers.DataBind();
            }
            con.Close();
            int recordCount = Convert.ToInt32(cmd.Parameters["@RecordCount"].Value);
            this.PopulatePager(recordCount, pageIndex);
        }
    }
}

private void PopulatePager(int recordCount, int currentPage)
{
    List<ListItem> pages = new List<ListItem>();
    int startIndex, endIndex;
    int pagerSpan = 5;

    //Calculate the Start and End Index of pages to be displayed.
    double dblPageCount = (double)((decimal)recordCount / Convert.ToDecimal(PageSize));
    int pageCount = (int)Math.Ceiling(dblPageCount);
    startIndex = currentPage > 1 && currentPage + pagerSpan - 1 < pagerSpan ? currentPage : 1;
    endIndex = pageCount > pagerSpan ? pagerSpan : pageCount;
    if (currentPage > pagerSpan % 2)
    {
        if (currentPage == 2)
        {
            endIndex = 5;
        }
        else
        {
            endIndex = currentPage + 2;
        }
    }
    else
    {
        endIndex = (pagerSpan - currentPage) + 1;
    }

    if (endIndex - (pagerSpan - 1) > startIndex)
    {
        startIndex = endIndex - (pagerSpan - 1);
    }

    if (endIndex > pageCount)
    {
        endIndex = pageCount;
        startIndex = ((endIndex - pagerSpan) + 1) > 0 ? (endIndex - pagerSpan) + 1 : 1;
    }

    //Add the First Page Button.
    if (currentPage > 1)
    {
        pages.Add(new ListItem("First", "1"));
    }

    //Add the Previous Button.
    if (currentPage > 1)
    {
        pages.Add(new ListItem("Previous", (currentPage - 1).ToString()));
    }

    for (int i = startIndex; i <= endIndex; i++)
    {
        pages.Add(new ListItem(i.ToString(), i.ToString(), i != currentPage));
    }

    //Add the Next Button.
    if (currentPage < pageCount)
    {
        pages.Add(new ListItem("Next", (currentPage + 1).ToString()));
    }

    //Add the Last Button.
    if (currentPage != pageCount)
    {
        pages.Add(new ListItem("Last", pageCount.ToString()));
    }
    rptPager.DataSource = pages;
    rptPager.DataBind();
}

protected void Page_Changed(object sender, EventArgs e)
{
    int pageIndex = int.Parse((sender as LinkButton).CommandArgument);
    this.GetCustomersPageWise(index);
}

Screenshot