vs2008 如何远程读取https网页的代码
vs2008下面如何远程读取https网页的内容，普通的http页面没有任何问题，找了一下方法，说用HttpClient 可以读取，但是我vs2008里面不能添加引用system.net.http,哪位大咖有比较详细的解决方案。
原因
正在尝试使用 VS2008 使用 Restful API 并尝试添加 System.Net.Http dll 作为参考。但这在 VS2008 中仍然不起作用。知道为什么吗？
HttpClient 是在 .NET Framework 4.5 中引入的，因此您无法使用早期版本使用它。
再次在 VS2012 中创建了一个使用 System.Net.Http 功能的类库，后来尝试在 2008 年调用类库 dll。这也不起作用。
也不能将 4.5 程序集与早期版本一起使用。
解决方法
可以有其他方法可以使用 VS2008 使用 Restful API。
要在 4.5 的早期版本中实现它，您可以使用 WebRequest：
To achieve it with earlier versions of 4.5 you can use WebRequest:
C# example:
// Create a request using a URL that can receive a post.
WebRequest request = WebRequest.Create ("http://www.contoso.com/PostAccepter.aspx ");
// Set the Method property of the request to POST.
request.Method = "POST";
// Create POST data and convert it to a byte array.
string postData = "This is a test that posts this string to a Web server.";
byte[] byteArray = Encoding.UTF8.GetBytes (postData);
// Set the ContentType property of the WebRequest.
request.ContentType = "application/x-www-form-urlencoded";
// Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length;
// Get the request stream.
Stream dataStream = request.GetRequestStream ();
// Write the data to the request stream.
dataStream.Write (byteArray, 0, byteArray.Length);
// Close the Stream object.
dataStream.Close ();
// Get the response.
WebResponse response = request.GetResponse ();
// Display the status.
Console.WriteLine (((HttpWebResponse)response).StatusDescription);
// Get the stream containing content returned by the server.
dataStream = response.GetResponseStream ();
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader (dataStream);
// Read the content.
string responseFromServer = reader.ReadToEnd ();
// Display the content.
Console.WriteLine (responseFromServer);
// Clean up the streams.
reader.Close ();
dataStream.Close ();
response.Close ();
VB.NET example:
' Create a request using a URL that can receive a post.
Dim request As WebRequest = WebRequest.Create("http://www.contoso.com/PostAccepter.aspx ")
' Set the Method property of the request to POST.
request.Method = "POST"
' Create POST data and convert it to a byte array.
Dim postData As String = "This is a test that posts this string to a Web server."
Dim byteArray As Byte() = Encoding.UTF8.GetBytes(postData)
' Set the ContentType property of the WebRequest.
request.ContentType = "application/x-www-form-urlencoded"
' Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length
' Get the request stream.
Dim dataStream As Stream = request.GetRequestStream()
' Write the data to the request stream.
dataStream.Write(byteArray, 0, byteArray.Length)
' Close the Stream object.
dataStream.Close()
' Get the response.
Dim response As WebResponse = request.GetResponse()
' Display the status.
Console.WriteLine(CType(response, HttpWebResponse).StatusDescription)
' Get the stream containing content returned by the server.
dataStream = response.GetResponseStream()
' Open the stream using a StreamReader for easy access.
Dim reader As New StreamReader(dataStream)
' Read the content.
Dim responseFromServer As String = reader.ReadToEnd()
' Display the content.
Console.WriteLine(responseFromServer)
' Clean up the streams.
reader.Close()
dataStream.Close()
response.Close()
https请求的话参考这个
using System;
using System.IO;
using System.Net;
using System.Text;
namespace Examples.System.Net
{
public class WebRequestPostExample
{
public static void Main ()
{
// Create a request using a URL that can receive a post.
WebRequest request = WebRequest.Create ("https://www.contoso.com/PostAccepter.aspx ");
// Set the Method property of the request to POST.
request.Method = "POST";
// Create POST data and convert it to a byte array.
string postData = "This is a test that posts this string to a Web server.";
byte[] byteArray = Encoding.UTF8.GetBytes (postData);
// Set the ContentType property of the WebRequest.
request.ContentType = "application/x-www-form-urlencoded";
// Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length;
// Get the request stream.
Stream dataStream = request.GetRequestStream ();
// Write the data to the request stream.
dataStream.Write (byteArray, 0, byteArray.Length);
// Close the Stream object.
dataStream.Close ();
// Get the response.
WebResponse response = request.GetResponse ();
// Display the status.
Console.WriteLine (((HttpWebResponse)response).StatusDescription);
// Get the stream containing content returned by the server.
dataStream = response.GetResponseStream ();
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader (dataStream);
// Read the content.
string responseFromServer = reader.ReadToEnd ();
// Display the content.
Console.WriteLine (responseFromServer);
// Clean up the streams.
reader.Close ();
dataStream.Close ();
response.Close ();
}
}
}
如有问题及时沟通
命名空间用System.Net
using System.Net;
实例代码参考下面的例子：
https://blog.csdn.net/luanpeng825485697/article/details/78168162
建议采用WinINet实现，没有https的限制。实现代码我放在网盘，你下载使用就行。有帮助请采纳！
写了个小例子，你参考写就行：
需要代码下载一下：
链接: https://pan.baidu.com/s/1bmI499PJa2QZcqWpDKQULw 提取码: 33e5 复制这段内容后打开百度网盘手机App，操作更方便哦
除了.NET自带的网络请求库，一些好用的第三方库其实也不错，这里推荐Flurl和RestSharp。
C#访问https地址实例
https://blog.csdn.net/weixin_30501857/article/details/102276790