vb.net - Extracting numbers from a PostRequest -


i posting web form using postreq() in vb.net.

the response contains string, "sessionid=wxyz", wxyz 4 digits. how can extract these numbers?

here's code:

public sub btn1_click(byval sender system.object, byval e system.eventargs) handles btn1.click     dim postdata string = "some post data"     dim url string = "http://localhost/form.php"     dim tempcookies new cookiecontainer     dim encoding new utf8encoding     dim bytedata byte() = encoding.getbytes(postdata)     dim postreq httpwebrequest = directcast(webrequest.create(url), httpwebrequest)     postreq.method = "post"     postreq.keepalive = true     postreq.cookiecontainer = tempcookies     postreq.contenttype = "application/x-www-form-urlencoded"     postreq.referer = url     postreq.useragent = "mozilla/5.0 (windows; u; windows nt 6.1; ru; rv:1.9.2.3) gecko/20100401 firefox/4.0 (.net clr 3.5.30729)"     postreq.contentlength = bytedata.length      dim postreqstream stream = postreq.getrequeststream()     postreqstream.write(bytedata, 0, bytedata.length)     postreqstream.close()     dim postresponse httpwebresponse      postresponse = directcast(postreq.getresponse(), httpwebresponse)     tempcookies.add(postresponse.cookies)     logincookie = tempcookies     dim postreqreader new streamreader(postresponse.getresponsestream())      dim thepage string = postreqreader.readtoend     dim r new system.text.regularexpressions.regex("sessionid=....")     end sub

just put part in group, can value using groups property of match object:

dim r new regex("sessionid=(\d{4})") dim id string = r.match(thepage).groups(1).value

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