asp.NetでJquery+Ajax+Jsonを用いてリフレッシュページのないインスタンスコードを実現

    

    

    

    



    

    

    <br>    var pageIndex =0;     
 <br>    var pageSize =10;     
 <br>    $(function () {<br>        InitTable(0);    
 <br>        
 <br>        $("#Pagination").pagination(<%=pageCount %>,{<br>            callback:PageCallback,<br>            prev_text:'   ',       
 <br>            next_text:'   ',       
 <br>            items_per_page:pageSize,  
 <br>            num_display_entries:6,    
 <br>            current_page:pageIndex,   
 <br>            num_edge_entries:2        
 <br>        });<p></p><p>        
 <p>         


    

    
        
            
            
            
        
    
    

    

    

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Text;

using System.Net;

using System.IO;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class AjaxJson : System.Web.UI.Page
{
    public string pageCount = string.Empty; //    
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string url = "/SupplyAJAX.aspx";
            string strResult = GetRequestJsonString(url, "type=getcount");
            pageCount = strResult.ToString();
        }
    }
    #region     ashx     
    /// 

    ///     ashx     
    /// 

    ///   
    ///   
    /// 
    public static string GetRequestJsonString(string relativePath, string data)
    {
        string requestUrl = GetRequestUrl(relativePath, data);

        try
        {
            WebRequest request = WebRequest.Create(requestUrl);
            request.Method = "GET";
            StreamReader jsonStream = new StreamReader(request.GetResponse().GetResponseStream());
            string jsonObject = jsonStream.ReadToEnd();
            return jsonObject;
        }
        catch
        {
            return string.Empty;
        }
    }
    public static string GetRequestUrl(string relativePath, string data)
    {
        string absolutePath = HttpContext.Current.Request.Url.AbsoluteUri;
        string hostNameAndPort = HttpContext.Current.Request.Url.Authority;
        string applicationDir = HttpContext.Current.Request.ApplicationPath;
        StringBuilder sbRequestUrl = new StringBuilder();
        sbRequestUrl.Append(absolutePath.Substring(0, absolutePath.IndexOf(hostNameAndPort)));
        sbRequestUrl.Append(hostNameAndPort);
        sbRequestUrl.Append(applicationDir);
        sbRequestUrl.Append(relativePath);
        if (!string.IsNullOrEmpty(data))
        {
            sbRequestUrl.Append("?");
            sbRequestUrl.Append(data);
        }
        return sbRequestUrl.ToString();
    }
    #endregion 
}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data;

using System.Web.UI;

using System.Web.UI.WebControls;

//    

using System.Web.Script.Serialization;

using System.Text;


public partial class SupplyAJAX : System.Web.UI.Page
{
    protected static List StudentList = new List();
    protected static int RecordCount = 0;
    protected static DataTable dt = CreateDT();
    protected void Page_Load(object sender, EventArgs e)
    {
        switch (Request["type"])
        {
            case "show":
                #region     
                //      
                int pageIndex;
                int.TryParse(Request["pageIndex"], out pageIndex);
                //      
                int PageSize = Convert.ToInt32(Request["pageSize"]);
                if (pageIndex == 0)
                {
                    pageIndex = 1;
                }
                #endregion 
                DataTable PagedDT = GetPagedTable(dt, pageIndex, PageSize);
                List list = new List();
                foreach (DataRow dr in PagedDT.Rows)
                {
                    Student c = new Student();
                    c.Id = (Int32)dr["Id"];
                    c.Name = dr["Name"].ToString();
                    c.Sex = dr["Sex"].ToString();
                    list.Add(c);  
                }
                string json = new JavaScriptSerializer().Serialize(list);//     ，  error 
                StringBuilder Builder = new StringBuilder();
                Builder.Append("{");
                Builder.Append("\"recordcount\":" + RecordCount + ",");
                Builder.Append("\"data\":");
                Builder.Append(json);
                Builder.Append("}");
                Response.ContentType = "application/json";
                Response.Write(Builder.ToString());
                break;
            case "getcount":
                Response.Write(dt.Rows.Count);
                break;
            case "add":
                break;
            case "update":
                break;
            case "delete":
                break;
        }
        Response.End();
    }
    #region     
    private static DataTable CreateDT()
    {
        DataTable dt = new DataTable();
        dt.Columns.Add(new DataColumn("Id", typeof(int)) { DefaultValue = 0 });
        dt.Columns.Add(new DataColumn("Name", typeof(string)) { DefaultValue = "1" });
        dt.Columns.Add(new DataColumn("Sex", typeof(string)) { DefaultValue = " " });
        for (int i = 1; i <= 1000; i++)
        {
            dt.Rows.Add(i, "  " + i.ToString().PadLeft(4, '0'));
        }
        RecordCount = dt.Rows.Count;
        return dt;
    }
    #endregion 
    /// 
  
    ///  DataTable    ,    1  
    /// 
  
    ///   
    ///   
    ///   
    ///   
    public static DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize)  
    {  
        if (PageIndex == 0)  
            return dt;  
        DataTable newdt = dt.Copy();  
        newdt.Clear();    
        int rowbegin = (PageIndex - 1) * PageSize;  
        int rowend = PageIndex * PageSize;  
        if (rowbegin >= dt.Rows.Count)  
            return newdt;  
        if (rowend > dt.Rows.Count)  
            rowend = dt.Rows.Count;  
        for (int i = rowbegin; i <= rowend - 1; i++)  
        {  
            DataRow newdr = newdt.NewRow();  
            DataRow dr = dt.Rows[i];  
            foreach (DataColumn column in dt.Columns)  
            {  
                newdr[column.ColumnName] = dr[column.ColumnName];  
            }  
            newdt.Rows.Add(newdr);  
        }  
        return newdt;  
    }  

    /// 
  
    ///        
    /// 
  
    ///        
    ///       
    ///   
    public static int getPageCount(int sumCount, int pageSize)  
    {  
        int page = sumCount / pageSize;  
        if (sumCount % pageSize > 0)  
        {  
            page = page + 1;  
        }  
        return page;  
    }  
  

    public struct Student
    {
        public int Id;
        public string Name;
        public string Sex;
    }  
}