爲什麼不能在C＃代碼文件中使用Request.ServerVariables [「ALL_HTTP」]？

Question

我可以在％tags， 之間的.Aspx文件中使用Request.ServerVariables["ALL_HTTP"]，即<%=Request.ServerVariables["ALL_HTTP"]%> 但是.cs文件不會識別名稱空間。是什麼賦予了？我需要將這些變量放入我的代碼文件中的數組中。

Answer 1

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

using System.Collections.Specialized; 

public partial class _Default : System.Web.UI.Page 
{ 
    protected void Page_Load(object sender, EventArgs e) 
    { 

     NameValueCollection coll; 
     coll = Request.ServerVariables; 
     // Get names of all keys into a string array. 
     String[] arr1 = coll.AllKeys; 
     for (int loop1 = 0; loop1 < arr1.Length; loop1++) 
     { 
      Response.Write("Key: " + arr1[loop1] + "<br>"); 
      String[] arr2 = coll.GetValues(arr1[loop1]); 
      for (int loop2 = 0; loop2 < arr2.Length; loop2++) 
      { 
       Response.Write("Value " + loop2 + ": " + Server.HtmlEncode(arr2[loop2]) + "<br>"); 
      } 
     } 


    } 
}