與通用處理器

Question

接口我在C＃這樣的通用處理器：

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

namespace RequestResponse 
{ 
    public class Handler : IHttpHandler 
    { 
     public void ProcessRequest(HttpContext context) 
     { 
      context.Response.ContentType = "text/plain"; 
      string function = context.Request.QueryString["function"]; 

      Methods m = new Methods(); 

      if(function.Equals("addition")) 
      { 
       int num1 = Convert.ToInt32(context.Request.QueryString["num1"]); 
       int num2 = Convert.ToInt32(context.Request.QueryString["num2"]); 
       int answer = m.addition(num1, num2); 
       context.Response.Write(answer); 
      } 

      if (function.Equals("subtraction")) 
      { 
       int num1 = Convert.ToInt32(context.Request.QueryString["num1"]); 
       int num2 = Convert.ToInt32(context.Request.QueryString["num2"]); 
       int answer = m.subtraction(num1, num2); 
       context.Response.Write(answer); 
      } 

      if(function.Equals("reverseString")) 
      { 
       string text = context.Request.QueryString["text"]; 
       text = m.reverseString(text); 
       context.Response.Write(text); 
      } 

      if (function.Equals("CalculateMD5Hash")) 
      { 
       string text = context.Request.QueryString["text"]; 
       text = m.CalculateMD5Hash(text); 
       context.Response.Write(text); 
      } 
     } 

     public bool IsReusable 
     { 
      get 
      { 
       return false; 
      } 
     } 
    } 
} 

我也有這個客戶端應用程序：

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

namespace Client 
{ 
    public partial class HomePage : System.Web.UI.Page 
    { 
     protected void Page_Load(object sender, EventArgs e) 
     { 
      if (TextBox_Function.Text.Equals("addition")) 
      { 
       int num1 = Convert.ToInt32(TextBox_Num1.Text); 
       int num2 = Convert.ToInt32(TextBox_Num2.Text); 
       HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:4000/Handler.ashx?function=" + TextBox_Function.Text + "&num1=" + num1 + "&num2=" + num2); 
       HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
       String answer = response.ToString(); 
       Session["answer"] = answer; 
       Response.Redirect("Results.aspx"); 
      } 

      if (TextBox_Function.Text.Equals("subtraction")) 
      { 
       int num1 = Convert.ToInt32(TextBox_Num1.Text); 
       int num2 = Convert.ToInt32(TextBox_Num2.Text); 
       HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:4000/Handler.ashx?function=" + TextBox_Function.Text + "&num1=" + num1 + "&num2=" + num2); 
       HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
       String answer = response.ToString(); 
       Session["answer"] = answer; 
       Response.Redirect("Results.aspx"); 
      } 

      if (TextBox_Function.Text.Equals("reverseString")) 
      { 
       String text = TextBox_Text.Text; 
       HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:4000/Handler.ashx?function=" + TextBox_Function.Text + "&text=" + text); 
       HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
       String answer = response.ToString(); 
       Session["answer"] = answer; 
       Response.Redirect("Results.aspx"); 
      } 

      if (TextBox_Function.Text.Equals("CalculateMD5Hash")) 
      { 
       String text = TextBox_Text.Text; 
       HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:4000/Handler.ashx?function=" + TextBox_Function.Text + "&text=" + text); 
       HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
       String answer = response.ToString(); 
       Session["answer"] = answer; 
       Response.Redirect("Results.aspx"); 
      } 
     } 
    } 
} 

現在，讓我們假設在我的客戶端應用程序，我提供「添加」作爲功能，「3」作爲num1和「5」作爲num2。

爲什麼答案生成（存儲在變量答案）是：

System.Net.HttpWebResponse

我在做什麼錯？請耐心等待，因爲我從未以這種方式在兩個應用程序之間進行通信。

Answer 1

的問題是在這裏：

HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
String answer = response.ToString(); 

你只是呼籲HttpWebResponseToString()，而想必你真正想要做的就是得到響應的主體內容 - 你」 d做這樣的事情：

// It's important to dispose of responses... 
using (var response = request.GetResponse()) 
{ 
    using (var reader = new StreamReader(response.GetResponseStream())) 
    { 
     string answer = reader.ReadToEnd(); 
    } 
}