C# Post 请求求助

Cool_Breeze 发表于 2021-6-17 21:03

本帖最后由 Cool_Breeze 于 2021-6-17 21:32 编辑

Python 代码 Post 请求代码没有问题：
# -*- encoding = utf-8 -*-
import requests
import urllib.parse

header = {
'user-agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36'
}
form_data = {
"FileNo" : "44078",
"Description": "",
"WriteDate" : "",
"WriteDate1" : "2021-6-17",
"WriteBy" : "",
"submit" : "++"
}
res = requests.post('xxx.asp', data = form_data, headers=header)
print(res.cookies.values())

with open('test.html', 'wb') as f:
f.write(res.content)

转换为C# 代码失败：
using System;
using System.IO;
using System.Text;
using System.Collections;
using System.Net;

class Program
{
static void Main()
{

   HttpWebRequest pcbQuery = (HttpWebRequest)WebRequest.Create("xxx.asp");
   pcbQuery.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36";
   pcbQuery.Method = "POST";
   pcbQuery.ContentType = "text/html; charset=gb2312";

   string formData = ProducedFormDate("123");
   pcbQueryWriteFormDate(pcbQuery, formData);
   // return;
   using (StreamWriter fw = new StreamWriter("test.Html", false, Encoding.Default))
   {
         fw.Write(pcbQueryResulted((HttpWebResponse)pcbQuery.GetResponse()));
   }
}

// 返回Post表单信息
static string ProducedFormDate(string pcbNo)
{
   return string.Format("FileNo={0}&Description=&WriteDate=&WriteDate1={1}&WriteBy=&submit=++",
         pcbNo, DateTime.Today.ToString("yyyy-M-d"));
}

// 将表单信息写入流
static void pcbQueryWriteFormDate(HttpWebRequest httpWebRequest, string formData)
{
   Console.WriteLine(formData);
   Console.WriteLine(formData.Length);
   byte[] formDataBytes =Encoding.Default.GetBytes(formData);
   using (Stream fw = httpWebRequest.GetRequestStream())
   {
         fw.Write(formDataBytes, 0, formDataBytes.Length);
   }
   Console.WriteLine(httpWebRequest.ContentLength);
}

// 返回网页内容
static string pcbQueryResulted(HttpWebResponse Response)
{
   Stream resStream = Response.GetResponseStream();
   string result = "";
   using (StreamReader fr = new StreamReader(resStream, Encoding.Default))
   {
         result = fr.ReadToEnd();
   }
   return result;
}
}

yunruifuzhu 发表于 2021-6-17 21:03

ContentType 决定了你请求参数的类型

Cool_Breeze 发表于 2021-6-17 21:33

将第15行改为 pcbQuery.ContentType = "application/x-www-form-urlencoded; charset=gb2312";解决！

火之国 发表于 2021-6-17 21:38

Cool_Breeze 发表于 2021-6-17 21:33
将第15行改为 pcbQuery.ContentType = "application/x-www-form-urlencoded; cha ...

你自己采纳自己了:lol

zyh666 发表于 2021-6-17 22:02

用retrofit库简单{:17_1073:}

Cool_Breeze 发表于 2021-6-17 22:08

zyh666 发表于 2021-6-17 22:02
用retrofit库简单

感谢。还没有听说过！哈哈！

Cool_Breeze 发表于 2021-6-17 22:11

火之国发表于 2021-6-17 21:38
你自己采纳自己了

幸好解决的快。不然就浪费大佬们时间了！

Light紫星 发表于 2021-6-18 10:42

推荐easyhttp库

UNITST 发表于 2021-6-20 19:23

自己帮了自己可还行

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C# Post 请求求助