Question

vb.net如何获取网页的cookie

Answer 1

这个问题有点意思，但题主表意不明，确切的说应该分Web端和客户端两种情况。
想来问到这个问题的不应该是开发Web端的，说说客户端的吧：
1、HttpWebRequest.CookieContainer
Cookies通过HttpResponse传给客户端，通过HttpRequest传回服务端，因此你可以
设置Response.Cookies集合的值修改Cookie

1

Response.Cookies("MyCookie")("Data") = myCookie

通过读取Request.Cookies集合的值得到Cookies的值

1

myCookie =Request.Cookies("MyCookie")("Data") & ""

2、本人自编的一个函数，放到一个模块里直接调用即可：

Dim myCookie As String
Public Function LoginAnGetCookie(ByRef sUser As String, ByRef sPass As String) As String()
On Error Resume Next
REM 登录网站并获得cookie
Dim url As String = "网站地址"
Dim postData As String = "sUser=" & sUser & "&sPass=" & sPass '假设传值的是这样的，实际中可用Fiddler抓取。
Dim wc As System.Net.WebClient = New System.Net.WebClient
Rem wc.Headers.Add("Cookie", myCookie) '可讲第一次获得的Cookie赋值给myCookie，然后在此处传值给网站即可
wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded")
wc.Headers.Add("UserAgent", "Mozilla/5.0(iPad; U; CPU iPhone OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B314 Safari/531.21.10)")
Dim sHtml As String = wc.UploadString(url, "POST", postData)
Dim arrAllKeys() As String = wc.ResponseHeaders.AllKeys
Dim sCookies As String = "Set-Cookie"
For i As Integer = 0 To arrAllKeys.Length - 1
If arrAllKeys(i).Equals("Set-Cookie") Then sCookies = wc.ResponseHeaders.Get(i)
Next i
Return New String() {sHtml, sCookies} '返回二维数组，其中LoginAnGetCookie(0)是网页源代码，LoginAnGetCookie(1)是登录后的Cookie
End Function