No-refresh paging code implemented by JQuery and JSon

As shown in the picture
No-refresh paging can solve this problem. The video is playing on it. Next, I click on the next page to read the comments. Most websites now have no-refresh paging.
The source code is as follows (I use one page to display 10 records):
Four files are needed
One entity class file CategoryInfoModel.cs
One SqlHelper SQLHelper.cs
One AJAX server-side processing Program PagedService.ashx
A client calls page WSXFY.htm
CategoryInfoModel.cs and SQLHelper.cs. I won’t write them. Everyone knows what the file is
PagedService.ashx. The code is as follows

Copy code The code is as follows:

 
using System.Web.Script.Serialization; 
public void ProcessRequest(HttpContext context ) 
{ 
context.Response.ContentType = "text/plain"; 
string strAction = context.Request["Action"]; 
//Get the page number
if (strAction = = "GetPageCount") 
{ 
string strSQL = "SELECT COUNT(*) FROM CategoryInfo"; 
int intRecordCount = SqlHelper.ExecuteScalar(strSQL); 
int intPageCount = intRecordCount / 10; 
if (intRecordCount % 10 != 0) 
{ 
intPageCount ; 
} 
context.Response.Write(intPageCount); 
}//Get the data of each page
else if (strAction == "GetPageData") 
{ 
string strPageNum = context.Request["PageNum"]; 
int intPageNum = Convert.ToInt32(strPageNum); 
int intStartRowIndex = (intPageNum - 1 ) * 10 1; 
int intEndRowIndex = (intPageNum) * 10 1; 
string strSQL = "SELECT * FROM ( SELECT ID,CategoryName,Row_Number() OVER(ORDER BY ID ASC) AS rownum FROM CategoryInfo) AS t"; 
strSQL = " WHERE t.rownum >= " intStartRowIndex " AND t.rownum <= " intEndRowIndex; 
DataSet ds = new DataSet(); 
SqlConnection conn = SqlHelper.GetConnection( ; 0; i < ds.Tables[0].Rows.Count; i ) 
{ 
CategoryInfoModel categoryinfo = new CategoryInfoModel(); 
categoryinfo.CategoryInfoID = Convert.ToInt32(ds.Tables[0] .Rows[i]["ID"]); 
categoryinfo.CategoryName = ds.Tables[0].Rows[i]["CategoryName"].ToString(); 
categoryinfo_list.Add(categoryinfo); 
} 
JavaScriptSerializer jss = new JavaScriptSerializer(); 
context.Response.Write(jss.Serialize(categoryinfo_list));//Serialize the entity collection into a javascript object 
} 
} 

 
WSXFY.htm The code is as follows

Copy the code The code is as follows:

No refresh paging

No-refresh paging code implemented by JQuery and JSon_jquery