asp. Net to search products and realize paging function

The effect is as follows ：

  <form id="form1" runat="server">
        <div class="row custom-content-search">
            <div class="col-sm-2 col-md-2"></div>
              <div  class="col-sm-10 col-md-10">
                <div class="input-group search">
           
                    <asp:TextBox ID="TextBox1" CssClass="form-control" runat="server" Width="685px" Height="35px"></asp:TextBox>
                    <asp:Button ID="Button1" CssClass="input-group-addon" runat="server" Text=" Search for " Height="35px" Width="50px" OnClick="Button1_Click" />
                 
                </div>
              </div>
            <div class="col-sm-2 col-md-2"></div>
        </div>
        <div class="row" style="margin-top:20px;">
            <div class="col-sm-1 col-md-1"></div>
        <div class="col-sm-2 col-md-2" >
         
            <table cellpadding="0" cellspacing="0" class="auto-style3" >                
                    <%
                       
                        if (drs != null)
                        {
    
		                    int i= 0;
                            foreach (System.Data.DataRow dr in drs)
                            {
    
		                        i++;
		                        if(i%5==1)
		                        {
    
                                     
                    %>
                                    <tr>
	                <%
	                            }
	                %>
                                        
                            <td>       
                                     
                              <a href="../GoodsDetials.aspx?id=<%=dr["good_id"]%>" onclick="SetID(<%=dr["good_id"] %>)"><%-- <asp:Image ID="img" runat="server" Width="195px" Height="195px" ImageUrl="~/images/new/1.jpg"/>--%>
                                  <img Width="195px" Height="195px"  alt="" src="<%=dr["good_path"].ToString().Replace("~","..") %>" />
                              </a>                                   
                                  <span style=" color:#3f90ca; font-size:18px;"> <%=dr["good_name"] %>    </span>                         
                            </td>
                            <td><span style="margin-right:20px;"></span></td>
                    <%
                            if(i%5==0 || i==drs.Count)
		                    {
    
                    %>
                                </tr><tr> <td>&nbsp;</td></tr>
	                <%
	                         }	           
                            }
                        }  
                    %>                                        
                    </table>               
       </div>      
   </div>
        <div class="row">
             <div class="col-sm-4 col-md-4"></div>
            <div class="col-sm-3 col-md-3" style="margin-top:15px; margin-bottom:15px; background-color:#cbe6fa; margin-left:50px; ">
                 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  common <asp:Label ID="TotalPageIndex" runat="server" Text="1"></asp:Label> page &nbsp;
                  Current <asp:Label ID="CurPageIndex" runat="server" Text="1"></asp:Label> page &nbsp;
                 <asp:LinkButton ID="UpPage" runat="server" OnClick="UpPage_Click"> The previous page </asp:LinkButton>
                 <asp:LinkButton ID="DownPage" runat="server" OnClick="DownPage_Click"> The next page </asp:LinkButton>
            </div>
            <div class="col-sm-5 col-md-5"></div>
        </div>
    </form>

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class ShowPage_search : System.Web.UI.Page
{
    
    Operation op = new Operation();
    protected DataRowCollection drs = null; // Bind global variables of page data 
    protected void Page_Load(object sender, EventArgs e)
    {
    
       
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
    
            DataBind(1);// The binding page data is loaded for the first time 
    }
    private void DataBind(int PageIndex)
    {
    
        int PageSize = 10;// Define the total number of data per page 
        // Query data 
        string search = TextBox1.Text.ToString();
       
        DataSet ds = op.SelectInfo22(search, PageIndex, PageSize);
        if (ds != null && ds.Tables.Count > 0)
        {
    
            int Count = 0;           
            int.TryParse(ds.Tables[0].Rows[0][0].ToString(), out Count);// Get the total number of data pieces   
            drs = ds.Tables[1].Rows;
            // Calculate paging data 
            int GetTotalPageIndex = (Count / PageSize) + ((Count % PageSize) > 0 ? 1 : 0);
            this.TotalPageIndex.Text = GetTotalPageIndex.ToString();
            this.CurPageIndex.Text = PageIndex.ToString();
            if (PageIndex == 1 && PageIndex == GetTotalPageIndex)
            {
    
                SetPageState(0);// If the current total number of pages is 1 The style called when the page is opened 
            }
            else if (PageIndex == 1)
            {
    
                SetPageState(1);// If the current style is the first page 
            }
            else if (PageIndex == GetTotalPageIndex)
            {
    
                SetPageState(2);// If the current style is the last page 
            }
            else
            {
    
                SetPageState(3);// The style called if the current page number is other than the first and last pages 
            }
        }
    }
    /// <summary>
    ///  Processing method on the previous page 
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void UpPage_Click(object sender, EventArgs e)
    {
    
        // Take out the current page number 
        int CurIndex = Convert.ToInt32(this.CurPageIndex.Text);
        CurIndex--;// Subtract the current page number 1
        DataBind(CurIndex);// Data binding 
    }
    /// <summary>
    ///  Processing method on the next page 
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void DownPage_Click(object sender, EventArgs e)
    {
    
        // Take out the current page number 
        int CurIndex = Convert.ToInt32(this.CurPageIndex.Text);
        CurIndex++;// Add... To the current page number 1
        DataBind(CurIndex);// Data binding 
    }
    /// <summary>
    ///  Set paging style 
    /// </summary>
    /// <param name="SetIndex"></param>
    public void SetPageState(int SetIndex)
    {
    
        // Set different styles according to different page numbers 
        if (SetIndex == 0)
        {
    
            this.UpPage.Enabled = false;
            this.DownPage.Enabled = false;
            this.UpPage.Style["color"] = "#808080";
            this.DownPage.Style["color"] = "#808080";
        }
        else if (SetIndex == 1)
        {
    
            this.UpPage.Enabled = false;
            this.DownPage.Enabled = true;
            this.UpPage.Style["color"] = "#808080";
            this.DownPage.Style["color"] = "#23527c";
        }
        else if (SetIndex == 2)
        {
    
            this.UpPage.Enabled = true;
            this.DownPage.Enabled = false;
            this.UpPage.Style["color"] = "#23527c";
            this.DownPage.Style["color"] = "#808080";
        }
        else
        {
    
            this.UpPage.Enabled = true;
            this.DownPage.Enabled = true;
            this.UpPage.Style["color"] = "#23527c";
            this.DownPage.Style["color"] = "#23527c";
        }
    }
}

 /// <summary>
    ///  Query product information by page 
    /// </summary>
    /// <param name="PageIndex"> Current page index sequence number </param>
    /// <param name="PageSize"> Each page shows the number of records </param>
    ///  Query the first column of the entire table count(1)   Query current page 
    /// <returns> Return query results DataSet Data sets </returns>
    public DataSet SelectInfo22(string search, int PageIndex, int PageSize)
    {
    
        int StartIndex = ((PageIndex - 1) * PageSize) + 1;
        int EndIndex = PageIndex * PageSize;
        SqlParameter[] parms = {
    
            data.MakeInParam("@info", SqlDbType.VarChar, 30, "%"+search+"%")
        };
        return data.RunProcReturn("select count(1) from good_info where good_name like @info ;" +
            "select * from(SELECT good_id, good_name, good_path, Row_Number() over(ORDER BY good_id DESC) as rowIndex " +
            "FROM good_info where good_name like @info) as Tab " +
            "where rowIndex between " + StartIndex + " and " + EndIndex, parms, "good_info");
    }