ok
this is Html:
<asp:LinkButton ID="Lbview" runat="server" CssClass="pakhsh" OnClick="Lbview_Click">other ptoduct</asp:LinkButton>
<asp:Label ID="Lblname" runat="server"></Label>
<asp:datalist id="DLMostanad" runat="server" repeatdirection="Vertical" cssclass="dLmostanad" visible="false">
                                <ItemTemplate>
                                    <div id="MainDL">
                                  <div id="MainDL1">
                                      <div id="MainDL11">
<asp:Label ID="Label3" runat="server" CssClass="lblcodeM" Text='<%# Eval("Code") %>'></asp:Label>
<asp:Label ID="Label4" runat="server" CssClass="lblnameM" Text='<%# Eval("Name") %>'></asp:Label>
                                      </div>                                                                 
                                  </div>
                                    </ItemTemplate>
                                </asp:datalist>
<asp:repeater id="rptPager3" runat="server" visible="false">
                                    <ItemTemplate>
                                        <asp:LinkButton ID="LinkButton3" runat="server" Text='<%#Eval("Text") %>' CommandArgument='<%# Eval("Value") %>'
                                            CssClass='<%# Eval("CssClass") %>' OnClick="Page_ChangedPLS" OnClientClick='<%# !Convert.ToBoolean(Eval("Enabled")) ? "return false;" : "" %>'></asp:LinkButton>
                                    </ItemTemplate>
                                </asp:repeater>
here is datalist with repeater that repeater contains datalist page number
and behincode:
 private int PageSize = 1;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            int data1 = Convert.ToInt32(Request.QueryString["Id"].ToString());
            ViewDocInfo(data1);
        }
    }
private void ViewDocInfo(int data1)
{
    using (SqlConnection conn = General.GetConnection())
    {
        using (SqlCommand _cmd = General.GetCommand("Documentry_ViewMostanadInfo", conn))
        {
            _cmd.Parameters.AddWithValue("@id", data1);
            conn.Open();
            SqlDataReader _dr = _cmd.ExecuteReader();
            while (_dr.Read())
            {
                Lblname.Text = _dr["Name"].ToString();
                Lblcode.Text = _dr["code"].ToString();
 
            }
        }
    }
}
 private void GetCustomersPageWiseView(int pageIndex)
    {
        using (SqlConnection conn = General.GetConnection())
        {
            using (SqlCommand cmd = General.GetCommand("GetCustomersPageWiseMC", conn))
            {
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@PageIndex", pageIndex);
                cmd.Parameters.AddWithValue("@PageSize", PageSize);
                cmd.Parameters.AddWithValue("@Topic", ddlmostanad.SelectedItem.Text);
                cmd.Parameters.AddWithValue("@Name", Lblname.Text);
                cmd.Parameters.Add("@RecordCount", SqlDbType.Int, 4);
                cmd.Parameters["@RecordCount"].Direction = ParameterDirection.Output;
                conn.Open();
                SqlDataReader idr = cmd.ExecuteReader();
                if (idr.HasRows)
                {
                    DLMostanad.DataSource = idr;
                    DLMostanad.DataBind();
                    rptPager3.Visible = true;
                }
                idr.Close();
                this.PopulatePagerPLS(Convert.ToInt32(cmd.Parameters["@RecordCount"].Value), pageIndex);
            }
        }
    }
protected void LBview_Click(object sender, EventArgs e)
 {
     Lblname.Visible = !((rptPager3.Visible=DLMostanad.Visible = true);
     this.GetCustomersPageWiseView(1);
 }
and these code are for repeater(datalist page number):
 private void PopulatePagerPLS(int recordCount, int currentPage)
    {
        double dblPageCount = (double)((decimal)recordCount / (decimal)PageSize);
        int pageCount = (int)Math.Ceiling(dblPageCount);
        List<PagerPage> pages = new List<PagerPage>();
        if (pageCount > 0)
        {
            pages.Add(new PagerPage(" اولین   ", "1", currentPage > 1, "button"));
            if (pageCount < 4)
            {
                for (int i = 1; i <= pageCount; i++)
                {
                    pages.Add(new PagerPage(i.ToString(), i.ToString(), i != currentPage));
                }
            }
            else if (currentPage < 4)
            {
                for (int i = 1; i <= 4; i++)
                {
                    pages.Add(new PagerPage(i.ToString(), i.ToString(), i != currentPage));
                }
                pages.Add(new PagerPage("...", (currentPage).ToString(), false, "button1"));
            }
            else if (currentPage > pageCount - 4)
            {
                pages.Add(new PagerPage("...", (currentPage).ToString(), false, "button1"));
                for (int i = currentPage - 1; i <= pageCount; i++)
                {
                    pages.Add(new PagerPage(i.ToString(), i.ToString(), i != currentPage));
                }
            }
            else
            {
                pages.Add(new PagerPage("...", (currentPage).ToString(), false));
                for (int i = currentPage - 2; i <= currentPage + 2; i++)
                {
                    pages.Add(new PagerPage(i.ToString(), i.ToString(), i != currentPage));
                }
                pages.Add(new PagerPage("...", (currentPage).ToString(), false));
            }
            pages.Add(new PagerPage(" آخرین  ", pageCount.ToString(), currentPage < pageCount, "button"));
        }
        rptPager3.DataSource = pages;
        rptPager3.DataBind();
    }
    protected void Page_ChangedPLS(object sender, EventArgs e)
    {
        int pageIndex = int.Parse((sender as LinkButton).CommandArgument);
        this.GetCustomersPageWiseView(1);
    }
here when I click on linkbutton(LbView) it shows datalist correctly with page number i.e below image:

in above image I show page number(with repeater) with red arrow untill now every things is ok but when I click on page number(2 or 3) it doesn't show any things it is this code:
 protected void Page_ChangedPLS(object sender, EventArgs e)
    {
        int pageIndex = int.Parse((sender as LinkButton).CommandArgument);
        this.GetCustomersPageWiseView(1);
    }
so I put breakpoint on  GetCustomersPageWiseView and see that when I click on page number value of  Lblname.Text is "" (nothing) becuse when I click on lbview button it will be Lblname.Text=false but I need Lblname.Text value in GetCustomersPageWiseView metod so when page is run before I click on LbView (linkbutton) I should save Lblname.text in some place to use it in GetCustomersPageWiseView metod
I hope  can explain clearly
best regards
neda