Ref:

Implement Paging in Repeater control in ASP.Net

Populate ASP.Net ListView from database and Repeat columns horizontally using GroupTemplate

HTML

<asp:ListView ID="ListView1" runat="server" GroupItemCount="3" GroupPlaceholderID="groupPlaceHolder1"
    ItemPlaceholderID="itemPlaceHolder1">
    <LayoutTemplate>
        <table>
            <asp:PlaceHolder runat="server" ID="groupPlaceHolder1"></asp:PlaceHolder>
        </table>
    </LayoutTemplate>
    <GroupTemplate>
        <tr>
            <asp:PlaceHolder runat="server" ID="itemPlaceHolder1"></asp:PlaceHolder>
        </tr>
    </GroupTemplate>
    <ItemTemplate>
        <td>
            <table cellpadding="2" cellspacing="0" border="1" style="width: 200px; height: 100px;
                border: dashed 2px #04AFEF; background-color: #B0E2F5">
                <tr>
                    <td>
                        <b><u><span class="name">
                            <%# Eval("ContactName") %></span></u></b>
                    </td>
                </tr>
                <tr>
                    <td>
                        <b>CustomerId: </b><span class="city">
                            <%# Eval("CustomerId")%></span><br />
                        <b>CompanyName: </b><span class="postal">
                            <%# Eval("CompanyName")%></span><br />
                    </td>
                </tr>
            </table>
        </td>
    </ItemTemplate>
</asp:ListView>
<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;" : "" %>'></asp:LinkButton>
    </ItemTemplate>
</asp:Repeater>

Namespaces

using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections.Generic;

C#

private int PageSize = 9;
protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        this.GetCustomersPageWise(1);
    }
}

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();
            IDataReader idr = cmd.ExecuteReader();
            ListView1.DataSource = idr;
            ListView1.DataBind();
            idr.Close();
            con.Close();
            int recordCount = Convert.ToInt32(cmd.Parameters["@RecordCount"].Value);
            this.PopulatePager(recordCount, pageIndex);
        }
    }
}

private void PopulatePager(int recordCount, int currentPage)
{
    double dblPageCount = (double)((decimal)recordCount / Convert.ToDecimal(PageSize));
    int pageCount = (int)Math.Ceiling(dblPageCount);
    List<ListItem> pages = new List<ListItem>();
    if (pageCount > 0)
    {
        for (int i = 1; i <= pageCount; i++)
        {
            pages.Add(new ListItem(i.ToString(), i.ToString(), i != currentPage));
        }
    }
    rptPager.DataSource = pages;
    rptPager.DataBind();
}

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

Screenshot