Simple implementation of ASP. NET non refresh paging

The following are all the steps to realize the non-refresh paging function shared with you. Welcome to learn.

1. Create a new paging stored procedure:

CREATE procedure [dbo].[P_Pager] 
(@PageNumber int, 
@PageSize int) 
as 
 declare @sql nvarchar(4000) 
  set @sql = 'select top ' + Convert(varchar, @PageSize)  + ' * from T_Test where [type]=1 and id not in (select top ' + Convert(varchar, (@PageNumber - 1) * @PageSize) + ' id from T_Test order by id desc) order by id desc' 
 exec sp_executesql @sql 
GO 

2. Set the Ajax control

If you want to achieve no refresh, you will definitely use Ajax. First, you must put in the essential:

< asp:ScriptManager ID="ScriptManager1" runat="server" >
< /asp:ScriptManager >
Then embed the Repeater control into UpdatePanel:

<asp:UpdatePanel ID="UpdatePanel1" runat="server"> 
      <ContentTemplate> 
          <ul> 
            <asp:Repeater ID="Repeater1" runat="server"> 
              <ItemTemplate> 
                <li> 
                  <p> 
                    <span><%#Eval("username") %> : </span><%#Eval("content").ToString())) %></p> 
                  <p> 
                    <em> Published at:  
                      <%#Eval("addtime") %> 
                    </em> 
                  </p> 
                </li> 
              </ItemTemplate> 
            </asp:Repeater> 
          </ul> 
          <p> 
               Total records: <asp:Literal ID="ltlCount" runat="server"></asp:Literal></p> 
            <p> 
              <webdiyer:AspNetPager ID="AspNetPager1" runat="server" AlwaysShow="true" PageIndexBoxType="DropDownList" > 
              </webdiyer:AspNetPager> 
            </p> 
          </div> 
      </ContentTemplate> 
    </asp:UpdatePanel> 

3. AspNetPager paging control

You can see that the above code has a paging control, I believe this paging control everyone is no stranger, I will not introduce more. You must have AspNetPager. dll, then reference it in the project, introducing this 1 piece of code in the header:

< %@ Register Assembly="AspNetPager" Namespace="Wuqi.Webdiyer" TagPrefix="webdiyer" % >
At this time, the paging control should be available. Finally, bind the data under 1 in the background, and bind the AspNetPager control at the same time. The complete background code is as follows:

using System; 
using System.Collections.Generic; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Data; 
using Wuqi.Webdiyer; 
using System.Data.SqlClient; 
  
public partial class AjaxPager : System.Web.UI.Page 
{ 
  int currentPageNumber;// Current page number   
  int pageSize = 5;// Number of records displayed per page  
  protected void Page_Load(object sender, EventArgs e) 
  { 
    if (!IsPostBack) 
    { 
      currentPageNumber = 1; 
      ViewState["currentPageNumber"] = currentPageNumber; 
      BindData(); 
    } 
    AspNetPager1.PageChanged += new EventHandler(AspNetPager1_PageChanged); // Defining Control Paging Events  
  } 
  
  // Get the total number of records  
  private int GetCount() 
  { 
    string sql = "select COUNT(*) from T_Test"; 
    DataTable dt = GetTable(sql, CommandType.Text, values); 
    if (dt.Rows.Count > 0) 
    { 
      return Convert.ToInt32(dt.Rows[0][0]); 
    } 
    else 
    { 
      return 0; 
    } 
  } 
    
  // Bind data  
  private void BindData() 
  { 
    ltlCount.Text = GetCount().ToString(); 
    currentPageNumber = Convert.ToInt32(ViewState["currentPageNumber"]); 
    SqlParameter[] values = { new SqlParameter("@PageNumber", currentPageNumber), new SqlParameter("@PageSize", pageSize) }; 
      
    DataTable dt = GetTable("P_Pager", CommandType.StoredProcedure, values); // Calling stored procedures  
    if (dt.Rows.Count > 0) 
    { 
      AspNetPager1.PageSize = pageSize; 
      AspNetPager1.RecordCount = GetCount(); 
      AspNetPager1.CurrentPageIndex = currentPageNumber; 
      this.Repeater1.DataSource = dt.DefaultView; 
      this.Repeater1.DataBind(); 
    } 
  } 
  
  // Paging event   
  void AspNetPager1_PageChanged(object sender, EventArgs e) 
  { 
    currentPageNumber = AspNetPager1.CurrentPageIndex; 
    ViewState["currentPageNumber"] = currentPageNumber; 
    BindData(); 
  } 
    
   //  Read stored procedure returns table 
  private DataTable GetTable(string sql, CommandType t, params SqlParameter[] values) 
  { 
    using (SqlConnection conn = new SqlConnection("Data Source=127.0.0.1;Initial Catalog=testDB;Persist Security Info=True;User ID=sa;Password=123456")) 
    { 
      SqlCommand comm = new SqlCommand(sql, conn); 
      comm.CommandType = t; 
      if (values != null && values.Length > 0) 
        comm.Parameters.AddRange(values); 
      SqlDataAdapter da = new SqlDataAdapter(comm); 
      DataSet ds = new DataSet(); 
      try 
      { 
        conn.Open(); 
        da.Fill(ds); 
        return ds.Tables[0]; 
      } 
      catch (Exception) 
      { 
        return null; 
      } 
      finally 
      { 
        conn.Close(); 
        conn.Dispose(); 
      } 
    } 
  } 
} 

At this point, it is basically done. Although it is relatively simple, it is worth collecting and learning knowledge points such as stored procedures, Ajax, paging controls, etc. I hope my article is to attract more attention and let everyone provide better methods, which is the motivation for me to learn.