C#後台擷取頁面資料

using System;  
using System.Collections.Generic;  
using System.Text;  
using System.Web;  

namespace pub.mo  
{  
public class request  
    {  
private request() { }  

/// <summary>  
/// 擷取session  
/// </summary>  
/// <param name="_session_name"></param>  
/// <returns></returns>
        public static string session(string _session_name)  
        {  
object obj = HttpContext.Current.Session[_session_name];  
return obj == null ? config.empty : obj.ToString();  
        }  

/// <summary>  
/// 得到Request.QueryString  
/// </summary>  
/// <param name="_str"></param>  
/// <returns></returns>
        public static string querystring(string _str)  
        {  
string s = HttpContext.Current.Request.QueryString[_str];  
return s == null ? config.empty : s;  
        }  

/// <summary>  
/// 得到Request.Form  
/// </summary>  
/// <param name="_str"></param>  
/// <returns></returns>
        public static string form(string _str)  
        {  
string s = HttpContext.Current.Request.Form[_str];  
return s == null ? config.empty : s;  
        }  

/// <summary>  
/// 得到Request.Cookies  
/// </summary>  
/// <param name="_str"></param>  
/// <returns></returns>
        public static string cookies(string _str)  
        {  
            HttpCookie hc = HttpContext.Current.Request.Cookies[_str];  
return hc == null ? config.empty : hc.Value;  
        }  

/// <summary>  
/// 獲得當前頁面的名稱  
/// </summary>  
/// <returns>當前頁面的名稱</returns>
        public static string page_name()  
        {  
string[] urlArr = HttpContext.Current.Request.Url.AbsolutePath.Split('/');  
return urlArr[urlArr.Length - 1].ToLower();  
        }  

/// <summary>  
/// 返回表單或Url參數的總個數  
/// </summary>  
/// <returns></returns>
        public static int param_count()  
        {  
return HttpContext.Current.Request.Form.Count + HttpContext.Current.Request.QueryString.Count;  
        }  

/// <summary>  
/// 得到 Request 的全部  
/// </summary>  
/// <param name="_str"></param>  
/// <returns></returns>
        public static string all(string _str)  
        {  
string s = HttpContext.Current.Request[_str];  
return s == null ? config.empty : s;  
        } 

#region 擷取id  
/// <summary>  
/// 常用 擷取ID 預設擷取URL id參數 不是數值時傳回值為0  
/// </summary>  
/// <returns></returns>
        public static int get_id()  
        {  
return fun.is_id(request.querystring("id"), 0);  
        }  

/// <summary>  
/// 常用 擷取ID 不是數值時傳回值為0  
/// </summary>  
/// <param name="_str"></param>  
/// <returns></returns>
        public static int get_id(string _str)  
        {  
return fun.is_id(request.querystring(_str), 0);  
        }  

/// <summary>  
/// 常用 擷取ID  
/// </summary>  
/// <param name="_str"></param>  
/// <param name="_return">不是數值時傳回值</param>  
/// <returns></returns>
        public static int get_id(string _str, int _return)  
        {  
return fun.is_id(request.querystring(_str), _return);  
        } 
#endregion  

    }  
}